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llvm-project/llvm/test/Transforms/InstCombine/minmax-fold.ll
Juneyoung Lee 9d70dbdc2b [InstCombine] use poison as placeholder for undemanded elems 
Currently undef is used as a don’t-care vector when constructing a vector using a series of insertelement.
However, this is problematic because undef isn’t undefined enough.
Especially, a sequence of insertelement can be optimized to shufflevector, but using undef as its placeholder makes shufflevector a poison-blocking instruction because undef cannot be optimized to poison.
This makes a few straightforward optimizations incorrect, such as:

```
;  https://bugs.llvm.org/show_bug.cgi?id=44185

define <4 x float> @insert_not_undef_shuffle_translate_commute(float %x, <4 x float> %y, <4 x float> %q) {
  %xv = insertelement <4 x float> %q, float %x, i32 2
  %r = shufflevector <4 x float> %y, <4 x float> %xv, <4 x i32> { 0, 6, 2, undef }
  ret <4 x float> %r ; %r[3] is undef
}
=>
define <4 x float> @insert_not_undef_shuffle_translate_commute(float %x, <4 x float> %y, <4 x float> %q) {
  %r = insertelement <4 x float> %y, float %x, i32 1
  ret <4 x float> %r ; %r[3] = %y[3], incorrect if %y[3] = poison
}

Transformation doesn't verify!
ERROR: Target is more poisonous than source
```

I’d like to suggest
1. Using poison as insertelement’s placeholder value (IRBuilder::CreateVectorSplat should be patched too)
2. Updating shufflevector’s semantics to return poison element if mask is undef

Note that poison is currently lowered into UNDEF in SelDag, so codegen part is okay.
m_Undef() matches PoisonValue as well, so existing optimizations will still fire.

The only concern is hidden miscompilations that will go incorrect when poison constant is given.
A conservative way is copying all tests having `insertelement undef` & replacing it with `insertelement poison` & run Alive2 on it, but it will create many tests and people won’t like it. :(

Instead, I’ll simply locally maintain the tests and run Alive2.
If there is any bug found, I’ll report it.

Relevant links: https://bugs.llvm.org/show_bug.cgi?id=43958 , http://lists.llvm.org/pipermail/llvm-dev/2019-November/137242.html

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D93586
2020-12-28 08:58:15 +09:00

1466 lines
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -instcombine < %s | FileCheck %s
; This is the canonical form for a type-changing min/max.
define i64 @t1(i32 %a) {
; CHECK-LABEL: @t1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[A:%.*]], 5
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 5
; CHECK-NEXT: [[TMP3:%.*]] = sext i32 [[TMP2]] to i64
; CHECK-NEXT: ret i64 [[TMP3]]
;
%1 = icmp slt i32 %a, 5
%2 = select i1 %1, i32 %a, i32 5
%3 = sext i32 %2 to i64
ret i64 %3
}
; Check this is converted into canonical form, as above.
define i64 @t2(i32 %a) {
; CHECK-LABEL: @t2(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[A:%.*]], 5
; CHECK-NEXT: [[NARROW:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 5
; CHECK-NEXT: [[TMP2:%.*]] = sext i32 [[NARROW]] to i64
; CHECK-NEXT: ret i64 [[TMP2]]
;
%1 = icmp slt i32 %a, 5
%2 = sext i32 %a to i64
%3 = select i1 %1, i64 %2, i64 5
ret i64 %3
}
; Same as @t2, with flipped operands and zext instead of sext.
define i64 @t3(i32 %a) {
; CHECK-LABEL: @t3(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[A:%.*]], 5
; CHECK-NEXT: [[NARROW:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 5
; CHECK-NEXT: [[TMP2:%.*]] = zext i32 [[NARROW]] to i64
; CHECK-NEXT: ret i64 [[TMP2]]
;
%1 = icmp ult i32 %a, 5
%2 = zext i32 %a to i64
%3 = select i1 %1, i64 5, i64 %2
ret i64 %3
}
; Same again, with trunc.
define i32 @t4(i64 %a) {
; CHECK-LABEL: @t4(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i64 [[A:%.*]], 5
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i64 [[A]], i64 5
; CHECK-NEXT: [[TMP3:%.*]] = trunc i64 [[TMP2]] to i32
; CHECK-NEXT: ret i32 [[TMP3]]
;
%1 = icmp slt i64 %a, 5
%2 = trunc i64 %a to i32
%3 = select i1 %1, i32 %2, i32 5
ret i32 %3
}
; Same as @t3, but with mismatched signedness between icmp and zext.
define i64 @t5(i32 %a) {
; CHECK-LABEL: @t5(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[A:%.*]], 5
; CHECK-NEXT: [[NARROW:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 5
; CHECK-NEXT: [[TMP2:%.*]] = zext i32 [[NARROW]] to i64
; CHECK-NEXT: ret i64 [[TMP2]]
;
%1 = icmp slt i32 %a, 5
%2 = zext i32 %a to i64
%3 = select i1 %1, i64 5, i64 %2
ret i64 %3
}
define float @t6(i32 %a) {
; CHECK-LABEL: @t6(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[A:%.*]], 0
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 0
; CHECK-NEXT: [[TMP3:%.*]] = sitofp i32 [[TMP2]] to float
; CHECK-NEXT: ret float [[TMP3]]
;
%1 = icmp slt i32 %a, 0
%2 = select i1 %1, i32 %a, i32 0
%3 = sitofp i32 %2 to float
ret float %3
}
define i16 @t7(i32 %a) {
; CHECK-LABEL: @t7(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[A:%.*]], -32768
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 -32768
; CHECK-NEXT: [[TMP3:%.*]] = trunc i32 [[TMP2]] to i16
; CHECK-NEXT: ret i16 [[TMP3]]
;
%1 = icmp slt i32 %a, -32768
%2 = trunc i32 %a to i16
%3 = select i1 %1, i16 %2, i16 -32768
ret i16 %3
}
; Just check for no infinite loop. InstSimplify liked to
; "simplify" -32767 by removing all the sign bits,
; which led to a canonicalization fight between different
; parts of instcombine.
define i32 @t8(i64 %a, i32 %b) {
; CHECK-LABEL: @t8(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i64 [[A:%.*]], -32767
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i64 [[A]], i64 -32767
; CHECK-NEXT: [[TMP3:%.*]] = trunc i64 [[TMP2]] to i32
; CHECK-NEXT: [[TMP4:%.*]] = icmp slt i32 [[B:%.*]], 42
; CHECK-NEXT: [[TMP5:%.*]] = select i1 [[TMP4]], i32 42, i32 [[TMP3]]
; CHECK-NEXT: [[TMP6:%.*]] = icmp ne i32 [[TMP5]], [[B]]
; CHECK-NEXT: [[TMP7:%.*]] = zext i1 [[TMP6]] to i32
; CHECK-NEXT: ret i32 [[TMP7]]
;
%1 = icmp slt i64 %a, -32767
%2 = select i1 %1, i64 %a, i64 -32767
%3 = trunc i64 %2 to i32
%4 = icmp slt i32 %b, 42
%5 = select i1 %4, i32 42, i32 %3
%6 = icmp ne i32 %5, %b
%7 = zext i1 %6 to i32
ret i32 %7
}
; Ensure this doesn't get converted to a min/max.
define i64 @t9(i32 %a) {
; CHECK-LABEL: @t9(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[A:%.*]], -1
; CHECK-NEXT: [[TMP2:%.*]] = sext i32 [[A]] to i64
; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[TMP1]], i64 [[TMP2]], i64 4294967295
; CHECK-NEXT: ret i64 [[TMP3]]
;
%1 = icmp sgt i32 %a, -1
%2 = sext i32 %a to i64
%3 = select i1 %1, i64 %2, i64 4294967295
ret i64 %3
}
define float @t10(i32 %x) {
; CHECK-LABEL: @t10(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], 255
; CHECK-NEXT: [[R1:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 255
; CHECK-NEXT: [[TMP2:%.*]] = sitofp i32 [[R1]] to float
; CHECK-NEXT: ret float [[TMP2]]
;
%f_x = sitofp i32 %x to float
%cmp = icmp sgt i32 %x, 255
%r = select i1 %cmp, float %f_x, float 255.0
ret float %r
}
define float @t11(i64 %x) {
; CHECK-LABEL: @t11(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i64 [[X:%.*]], 255
; CHECK-NEXT: [[R1:%.*]] = select i1 [[TMP1]], i64 [[X]], i64 255
; CHECK-NEXT: [[TMP2:%.*]] = sitofp i64 [[R1]] to float
; CHECK-NEXT: ret float [[TMP2]]
;
%f_x = sitofp i64 %x to float
%cmp = icmp sgt i64 %x, 255
%r = select i1 %cmp, float %f_x, float 255.0
ret float %r
}
; Reuse the first 2 bitcasts as the select operands.
define <4 x i32> @bitcasts_fcmp_1(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @bitcasts_fcmp_1(
; CHECK-NEXT: [[T0:%.*]] = bitcast <2 x i64> [[A:%.*]] to <4 x float>
; CHECK-NEXT: [[T1:%.*]] = bitcast <2 x i64> [[B:%.*]] to <4 x float>
; CHECK-NEXT: [[T2:%.*]] = fcmp olt <4 x float> [[T1]], [[T0]]
; CHECK-NEXT: [[TMP1:%.*]] = select <4 x i1> [[T2]], <4 x float> [[T0]], <4 x float> [[T1]]
; CHECK-NEXT: [[T5:%.*]] = bitcast <4 x float> [[TMP1]] to <4 x i32>
; CHECK-NEXT: ret <4 x i32> [[T5]]
;
%t0 = bitcast <2 x i64> %a to <4 x float>
%t1 = bitcast <2 x i64> %b to <4 x float>
%t2 = fcmp olt <4 x float> %t1, %t0
%t3 = bitcast <2 x i64> %a to <4 x i32>
%t4 = bitcast <2 x i64> %b to <4 x i32>
%t5 = select <4 x i1> %t2, <4 x i32> %t3, <4 x i32> %t4
ret <4 x i32> %t5
}
; Switch cmp operand order.
define <4 x i32> @bitcasts_fcmp_2(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @bitcasts_fcmp_2(
; CHECK-NEXT: [[T0:%.*]] = bitcast <2 x i64> [[A:%.*]] to <4 x float>
; CHECK-NEXT: [[T1:%.*]] = bitcast <2 x i64> [[B:%.*]] to <4 x float>
; CHECK-NEXT: [[T2:%.*]] = fcmp olt <4 x float> [[T0]], [[T1]]
; CHECK-NEXT: [[TMP1:%.*]] = select <4 x i1> [[T2]], <4 x float> [[T0]], <4 x float> [[T1]]
; CHECK-NEXT: [[T5:%.*]] = bitcast <4 x float> [[TMP1]] to <4 x i32>
; CHECK-NEXT: ret <4 x i32> [[T5]]
;
%t0 = bitcast <2 x i64> %a to <4 x float>
%t1 = bitcast <2 x i64> %b to <4 x float>
%t2 = fcmp olt <4 x float> %t0, %t1
%t3 = bitcast <2 x i64> %a to <4 x i32>
%t4 = bitcast <2 x i64> %b to <4 x i32>
%t5 = select <4 x i1> %t2, <4 x i32> %t3, <4 x i32> %t4
ret <4 x i32> %t5
}
; Integer cmp should have the same transforms.
define <4 x float> @bitcasts_icmp(<2 x i64> %a, <2 x i64> %b) {
; CHECK-LABEL: @bitcasts_icmp(
; CHECK-NEXT: [[T0:%.*]] = bitcast <2 x i64> [[A:%.*]] to <4 x i32>
; CHECK-NEXT: [[T1:%.*]] = bitcast <2 x i64> [[B:%.*]] to <4 x i32>
; CHECK-NEXT: [[T2:%.*]] = icmp slt <4 x i32> [[T1]], [[T0]]
; CHECK-NEXT: [[TMP1:%.*]] = select <4 x i1> [[T2]], <4 x i32> [[T0]], <4 x i32> [[T1]]
; CHECK-NEXT: [[T5:%.*]] = bitcast <4 x i32> [[TMP1]] to <4 x float>
; CHECK-NEXT: ret <4 x float> [[T5]]
;
%t0 = bitcast <2 x i64> %a to <4 x i32>
%t1 = bitcast <2 x i64> %b to <4 x i32>
%t2 = icmp slt <4 x i32> %t1, %t0
%t3 = bitcast <2 x i64> %a to <4 x float>
%t4 = bitcast <2 x i64> %b to <4 x float>
%t5 = select <4 x i1> %t2, <4 x float> %t3, <4 x float> %t4
ret <4 x float> %t5
}
; SMIN(SMIN(X, 11), 92) -> SMIN(X, 11)
define i32 @test68(i32 %x) {
; CHECK-LABEL: @test68(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[X:%.*]], 11
; CHECK-NEXT: [[COND:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 11
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp slt i32 11, %x
%cond = select i1 %cmp, i32 11, i32 %x
%cmp3 = icmp slt i32 92, %cond
%retval = select i1 %cmp3, i32 92, i32 %cond
ret i32 %retval
}
define <2 x i32> @test68vec(<2 x i32> %x) {
; CHECK-LABEL: @test68vec(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt <2 x i32> [[X:%.*]], <i32 11, i32 11>
; CHECK-NEXT: [[COND:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[X]], <2 x i32> <i32 11, i32 11>
; CHECK-NEXT: ret <2 x i32> [[COND]]
;
%cmp = icmp slt <2 x i32> <i32 11, i32 11>, %x
%cond = select <2 x i1> %cmp, <2 x i32> <i32 11, i32 11>, <2 x i32> %x
%cmp3 = icmp slt <2 x i32> <i32 92, i32 92>, %cond
%retval = select <2 x i1> %cmp3, <2 x i32> <i32 92, i32 92>, <2 x i32> %cond
ret <2 x i32> %retval
}
; MIN(MIN(X, 24), 83) -> MIN(X, 24)
define i32 @test69(i32 %x) {
; CHECK-LABEL: @test69(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[X:%.*]], 24
; CHECK-NEXT: [[COND:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 24
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ult i32 24, %x
%cond = select i1 %cmp, i32 24, i32 %x
%cmp3 = icmp ult i32 83, %cond
%retval = select i1 %cmp3, i32 83, i32 %cond
ret i32 %retval
}
; SMAX(SMAX(X, 75), 36) -> SMAX(X, 75)
define i32 @test70(i32 %x) {
; CHECK-LABEL: @test70(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], 75
; CHECK-NEXT: [[COND:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 75
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp slt i32 %x, 75
%cond = select i1 %cmp, i32 75, i32 %x
%cmp3 = icmp slt i32 %cond, 36
%retval = select i1 %cmp3, i32 36, i32 %cond
ret i32 %retval
}
; MAX(MAX(X, 68), 47) -> MAX(X, 68)
define i32 @test71(i32 %x) {
; CHECK-LABEL: @test71(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[X:%.*]], 68
; CHECK-NEXT: [[COND:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 68
; CHECK-NEXT: ret i32 [[COND]]
;
%cmp = icmp ult i32 %x, 68
%cond = select i1 %cmp, i32 68, i32 %x
%cmp3 = icmp ult i32 %cond, 47
%retval = select i1 %cmp3, i32 47, i32 %cond
ret i32 %retval
}
; SMIN(SMIN(X, 92), 11) -> SMIN(X, 11)
define i32 @test72(i32 %x) {
; CHECK-LABEL: @test72(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[X:%.*]], 11
; CHECK-NEXT: [[RETVAL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 11
; CHECK-NEXT: ret i32 [[RETVAL]]
;
%cmp = icmp sgt i32 %x, 92
%cond = select i1 %cmp, i32 92, i32 %x
%cmp3 = icmp sgt i32 %cond, 11
%retval = select i1 %cmp3, i32 11, i32 %cond
ret i32 %retval
}
define <2 x i32> @test72vec(<2 x i32> %x) {
; CHECK-LABEL: @test72vec(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt <2 x i32> [[X:%.*]], <i32 11, i32 11>
; CHECK-NEXT: [[RETVAL:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[X]], <2 x i32> <i32 11, i32 11>
; CHECK-NEXT: ret <2 x i32> [[RETVAL]]
;
%cmp = icmp sgt <2 x i32> %x, <i32 92, i32 92>
%cond = select <2 x i1> %cmp, <2 x i32> <i32 92, i32 92>, <2 x i32> %x
%cmp3 = icmp sgt <2 x i32> %cond, <i32 11, i32 11>
%retval = select <2 x i1> %cmp3, <2 x i32> <i32 11, i32 11>, <2 x i32> %cond
ret <2 x i32> %retval
}
; MIN(MIN(X, 83), 24) -> MIN(X, 24)
define i32 @test73(i32 %x) {
; CHECK-LABEL: @test73(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[X:%.*]], 24
; CHECK-NEXT: [[RETVAL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 24
; CHECK-NEXT: ret i32 [[RETVAL]]
;
%cmp = icmp ugt i32 %x, 83
%cond = select i1 %cmp, i32 83, i32 %x
%cmp3 = icmp ugt i32 %cond, 24
%retval = select i1 %cmp3, i32 24, i32 %cond
ret i32 %retval
}
; SMAX(SMAX(X, 36), 75) -> SMAX(X, 75)
define i32 @test74(i32 %x) {
; CHECK-LABEL: @test74(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[X:%.*]], 75
; CHECK-NEXT: [[RETVAL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 75
; CHECK-NEXT: ret i32 [[RETVAL]]
;
%cmp = icmp slt i32 %x, 36
%cond = select i1 %cmp, i32 36, i32 %x
%cmp3 = icmp slt i32 %cond, 75
%retval = select i1 %cmp3, i32 75, i32 %cond
ret i32 %retval
}
; MAX(MAX(X, 47), 68) -> MAX(X, 68)
define i32 @test75(i32 %x) {
; CHECK-LABEL: @test75(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[X:%.*]], 68
; CHECK-NEXT: [[RETVAL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 68
; CHECK-NEXT: ret i32 [[RETVAL]]
;
%cmp = icmp ult i32 %x, 47
%cond = select i1 %cmp, i32 47, i32 %x
%cmp3 = icmp ult i32 %cond, 68
%retval = select i1 %cmp3, i32 68, i32 %cond
ret i32 %retval
}
; The next 10 tests are value clamping with constants:
; https://llvm.org/bugs/show_bug.cgi?id=31693
; (X <s C1) ? C1 : SMIN(X, C2) ==> SMAX(SMIN(X, C2), C1)
define i32 @clamp_signed1(i32 %x) {
; CHECK-LABEL: @clamp_signed1(
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[X:%.*]], 255
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 255
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[MIN]], 15
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MIN]], i32 15
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp slt i32 %x, 255
%min = select i1 %cmp2, i32 %x, i32 255
%cmp1 = icmp slt i32 %x, 15
%r = select i1 %cmp1, i32 15, i32 %min
ret i32 %r
}
; (X >s C1) ? C1 : SMAX(X, C2) ==> SMIN(SMAX(X, C2), C1)
define i32 @clamp_signed2(i32 %x) {
; CHECK-LABEL: @clamp_signed2(
; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i32 [[X:%.*]], 15
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 15
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[MAX]], 255
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MAX]], i32 255
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp sgt i32 %x, 15
%max = select i1 %cmp2, i32 %x, i32 15
%cmp1 = icmp sgt i32 %x, 255
%r = select i1 %cmp1, i32 255, i32 %max
ret i32 %r
}
; (X >s C1) ? SMIN(X, C2) : C1 ==> SMAX(SMIN(X, C2), C1)
define i32 @clamp_signed3(i32 %x) {
; CHECK-LABEL: @clamp_signed3(
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[X:%.*]], 255
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 255
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[MIN]], 15
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MIN]], i32 15
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp slt i32 %x, 255
%min = select i1 %cmp2, i32 %x, i32 255
%cmp1 = icmp sgt i32 %x, 15
%r = select i1 %cmp1, i32 %min, i32 15
ret i32 %r
}
; (X <s C1) ? SMAX(X, C2) : C1 ==> SMIN(SMAX(X, C1), C2)
define i32 @clamp_signed4(i32 %x) {
; CHECK-LABEL: @clamp_signed4(
; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i32 [[X:%.*]], 15
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 15
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[MAX]], 255
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MAX]], i32 255
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp sgt i32 %x, 15
%max = select i1 %cmp2, i32 %x, i32 15
%cmp1 = icmp slt i32 %x, 255
%r = select i1 %cmp1, i32 %max, i32 255
ret i32 %r
}
; (X <u C1) ? C1 : UMIN(X, C2) ==> UMAX(UMIN(X, C2), C1)
define i32 @clamp_unsigned1(i32 %x) {
; CHECK-LABEL: @clamp_unsigned1(
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i32 [[X:%.*]], 255
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 255
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[MIN]], 15
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MIN]], i32 15
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp ult i32 %x, 255
%min = select i1 %cmp2, i32 %x, i32 255
%cmp1 = icmp ult i32 %x, 15
%r = select i1 %cmp1, i32 15, i32 %min
ret i32 %r
}
; (X >u C1) ? C1 : UMAX(X, C2) ==> UMIN(UMAX(X, C2), C1)
define i32 @clamp_unsigned2(i32 %x) {
; CHECK-LABEL: @clamp_unsigned2(
; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 [[X:%.*]], 15
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 15
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[MAX]], 255
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MAX]], i32 255
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp ugt i32 %x, 15
%max = select i1 %cmp2, i32 %x, i32 15
%cmp1 = icmp ugt i32 %x, 255
%r = select i1 %cmp1, i32 255, i32 %max
ret i32 %r
}
; (X >u C1) ? UMIN(X, C2) : C1 ==> UMAX(UMIN(X, C2), C1)
define i32 @clamp_unsigned3(i32 %x) {
; CHECK-LABEL: @clamp_unsigned3(
; CHECK-NEXT: [[CMP2:%.*]] = icmp ult i32 [[X:%.*]], 255
; CHECK-NEXT: [[MIN:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 255
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[MIN]], 15
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MIN]], i32 15
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp ult i32 %x, 255
%min = select i1 %cmp2, i32 %x, i32 255
%cmp1 = icmp ugt i32 %x, 15
%r = select i1 %cmp1, i32 %min, i32 15
ret i32 %r
}
; (X <u C1) ? UMAX(X, C2) : C1 ==> UMIN(UMAX(X, C2), C1)
define i32 @clamp_unsigned4(i32 %x) {
; CHECK-LABEL: @clamp_unsigned4(
; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 [[X:%.*]], 15
; CHECK-NEXT: [[MAX:%.*]] = select i1 [[CMP2]], i32 [[X]], i32 15
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[MAX]], 255
; CHECK-NEXT: [[R:%.*]] = select i1 [[TMP1]], i32 [[MAX]], i32 255
; CHECK-NEXT: ret i32 [[R]]
;
%cmp2 = icmp ugt i32 %x, 15
%max = select i1 %cmp2, i32 %x, i32 15
%cmp1 = icmp ult i32 %x, 255
%r = select i1 %cmp1, i32 %max, i32 255
ret i32 %r
}
; Check that clamp is recognized and there is no infinite
; loop because of reverse cmp transformation:
; (icmp sgt smin(PositiveA, B) 0) -> (icmp sgt B 0)
define i32 @clamp_check_for_no_infinite_loop1(i32 %i) {
; CHECK-LABEL: @clamp_check_for_no_infinite_loop1(
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[I:%.*]], 255
; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[CMP1]], i32 [[I]], i32 255
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[SEL1]], 0
; CHECK-NEXT: [[RES:%.*]] = select i1 [[TMP1]], i32 [[SEL1]], i32 0
; CHECK-NEXT: ret i32 [[RES]]
;
%cmp1 = icmp slt i32 %i, 255
%sel1 = select i1 %cmp1, i32 %i, i32 255
%cmp2 = icmp slt i32 %i, 0
%res = select i1 %cmp2, i32 0, i32 %sel1
ret i32 %res
}
; Check that there is no infinite loop in case of:
; (icmp slt smax(NegativeA, B) 0) -> (icmp slt B 0)
define i32 @clamp_check_for_no_infinite_loop2(i32 %i) {
; CHECK-LABEL: @clamp_check_for_no_infinite_loop2(
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[I:%.*]], -255
; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[CMP1]], i32 [[I]], i32 -255
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[SEL1]], 0
; CHECK-NEXT: [[RES:%.*]] = select i1 [[TMP1]], i32 [[SEL1]], i32 0
; CHECK-NEXT: ret i32 [[RES]]
;
%cmp1 = icmp sgt i32 %i, -255
%sel1 = select i1 %cmp1, i32 %i, i32 -255
%cmp2 = icmp slt i32 %i, 0
%res = select i1 %cmp2, i32 %sel1, i32 0
ret i32 %res
}
; Check that there is no infinite loop because of reverse cmp transformation:
; (icmp slt smax(PositiveA, B) 2) -> (icmp eq B 1)
define i32 @clamp_check_for_no_infinite_loop3(i32 %i) {
; CHECK-LABEL: @clamp_check_for_no_infinite_loop3(
; CHECK-NEXT: [[I2:%.*]] = icmp sgt i32 [[I:%.*]], 1
; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i32 [[I]], i32 1
; CHECK-NEXT: br i1 true, label [[TRUELABEL:%.*]], label [[FALSELABEL:%.*]]
; CHECK: truelabel:
; CHECK-NEXT: [[I5:%.*]] = icmp slt i32 [[I3]], 2
; CHECK-NEXT: [[I6:%.*]] = select i1 [[I5]], i32 [[I3]], i32 2
; CHECK-NEXT: [[I7:%.*]] = shl nuw nsw i32 [[I6]], 2
; CHECK-NEXT: ret i32 [[I7]]
; CHECK: falselabel:
; CHECK-NEXT: ret i32 0
;
%i2 = icmp sgt i32 %i, 1
%i3 = select i1 %i2, i32 %i, i32 1
%i4 = icmp sgt i32 %i3, 0
br i1 %i4, label %truelabel, label %falselabel
truelabel: ; %i<=1, %i3>0
%i5 = icmp slt i32 %i3, 2
%i6 = select i1 %i5, i32 %i3, i32 2
%i7 = shl nuw nsw i32 %i6, 2
ret i32 %i7
falselabel:
ret i32 0
}
; The next 3 min tests should canonicalize to the same form...and not infinite loop.
define double @PR31751_umin1(i32 %x) {
; CHECK-LABEL: @PR31751_umin1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[X:%.*]], 2147483647
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 2147483647
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp slt i32 %x, 0
%sel = select i1 %cmp, i32 2147483647, i32 %x
%conv = sitofp i32 %sel to double
ret double %conv
}
define double @PR31751_umin2(i32 %x) {
; CHECK-LABEL: @PR31751_umin2(
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[X:%.*]], 2147483647
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[X]], i32 2147483647
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp ult i32 %x, 2147483647
%sel = select i1 %cmp, i32 %x, i32 2147483647
%conv = sitofp i32 %sel to double
ret double %conv
}
define double @PR31751_umin3(i32 %x) {
; CHECK-LABEL: @PR31751_umin3(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[X:%.*]], 2147483647
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 2147483647
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp ugt i32 %x, 2147483647
%sel = select i1 %cmp, i32 2147483647, i32 %x
%conv = sitofp i32 %sel to double
ret double %conv
}
; The next 3 max tests should canonicalize to the same form...and not infinite loop.
define double @PR31751_umax1(i32 %x) {
; CHECK-LABEL: @PR31751_umax1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[X:%.*]], -2147483648
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 -2147483648
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp sgt i32 %x, -1
%sel = select i1 %cmp, i32 2147483648, i32 %x
%conv = sitofp i32 %sel to double
ret double %conv
}
define double @PR31751_umax2(i32 %x) {
; CHECK-LABEL: @PR31751_umax2(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[X:%.*]], -2147483648
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[X]], i32 -2147483648
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp ugt i32 %x, 2147483648
%sel = select i1 %cmp, i32 %x, i32 2147483648
%conv = sitofp i32 %sel to double
ret double %conv
}
define double @PR31751_umax3(i32 %x) {
; CHECK-LABEL: @PR31751_umax3(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[X:%.*]], -2147483648
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 -2147483648
; CHECK-NEXT: [[CONV:%.*]] = sitofp i32 [[SEL]] to double
; CHECK-NEXT: ret double [[CONV]]
;
%cmp = icmp ult i32 %x, 2147483648
%sel = select i1 %cmp, i32 2147483648, i32 %x
%conv = sitofp i32 %sel to double
ret double %conv
}
; The icmp/select form a canonical smax, so don't hide that by folding the final bitcast into the select.
define float @bitcast_scalar_smax(float %x, float %y) {
; CHECK-LABEL: @bitcast_scalar_smax(
; CHECK-NEXT: [[BCX:%.*]] = bitcast float [[X:%.*]] to i32
; CHECK-NEXT: [[BCY:%.*]] = bitcast float [[Y:%.*]] to i32
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[BCX]], [[BCY]]
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[BCX]], i32 [[BCY]]
; CHECK-NEXT: [[BCS:%.*]] = bitcast i32 [[SEL]] to float
; CHECK-NEXT: ret float [[BCS]]
;
%bcx = bitcast float %x to i32
%bcy = bitcast float %y to i32
%cmp = icmp sgt i32 %bcx, %bcy
%sel = select i1 %cmp, i32 %bcx, i32 %bcy
%bcs = bitcast i32 %sel to float
ret float %bcs
}
; FIXME: Create a canonical umax by bitcasting the select.
define float @bitcast_scalar_umax(float %x, float %y) {
; CHECK-LABEL: @bitcast_scalar_umax(
; CHECK-NEXT: [[BCX:%.*]] = bitcast float [[X:%.*]] to i32
; CHECK-NEXT: [[BCY:%.*]] = bitcast float [[Y:%.*]] to i32
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[BCX]], [[BCY]]
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], float [[X]], float [[Y]]
; CHECK-NEXT: ret float [[SEL]]
;
%bcx = bitcast float %x to i32
%bcy = bitcast float %y to i32
%cmp = icmp ugt i32 %bcx, %bcy
%sel = select i1 %cmp, float %x, float %y
ret float %sel
}
; PR32306 - https://bugs.llvm.org/show_bug.cgi?id=32306
; The icmp/select form a canonical smin, so don't hide that by folding the final bitcast into the select.
define <8 x float> @bitcast_vector_smin(<8 x float> %x, <8 x float> %y) {
; CHECK-LABEL: @bitcast_vector_smin(
; CHECK-NEXT: [[BCX:%.*]] = bitcast <8 x float> [[X:%.*]] to <8 x i32>
; CHECK-NEXT: [[BCY:%.*]] = bitcast <8 x float> [[Y:%.*]] to <8 x i32>
; CHECK-NEXT: [[CMP:%.*]] = icmp slt <8 x i32> [[BCX]], [[BCY]]
; CHECK-NEXT: [[SEL:%.*]] = select <8 x i1> [[CMP]], <8 x i32> [[BCX]], <8 x i32> [[BCY]]
; CHECK-NEXT: [[BCS:%.*]] = bitcast <8 x i32> [[SEL]] to <8 x float>
; CHECK-NEXT: ret <8 x float> [[BCS]]
;
%bcx = bitcast <8 x float> %x to <8 x i32>
%bcy = bitcast <8 x float> %y to <8 x i32>
%cmp = icmp slt <8 x i32> %bcx, %bcy
%sel = select <8 x i1> %cmp, <8 x i32> %bcx, <8 x i32> %bcy
%bcs = bitcast <8 x i32> %sel to <8 x float>
ret <8 x float> %bcs
}
; FIXME: Create a canonical umin by bitcasting the select.
define <8 x float> @bitcast_vector_umin(<8 x float> %x, <8 x float> %y) {
; CHECK-LABEL: @bitcast_vector_umin(
; CHECK-NEXT: [[BCX:%.*]] = bitcast <8 x float> [[X:%.*]] to <8 x i32>
; CHECK-NEXT: [[BCY:%.*]] = bitcast <8 x float> [[Y:%.*]] to <8 x i32>
; CHECK-NEXT: [[CMP:%.*]] = icmp slt <8 x i32> [[BCX]], [[BCY]]
; CHECK-NEXT: [[SEL:%.*]] = select <8 x i1> [[CMP]], <8 x float> [[X]], <8 x float> [[Y]]
; CHECK-NEXT: ret <8 x float> [[SEL]]
;
%bcx = bitcast <8 x float> %x to <8 x i32>
%bcy = bitcast <8 x float> %y to <8 x i32>
%cmp = icmp slt <8 x i32> %bcx, %bcy
%sel = select <8 x i1> %cmp, <8 x float> %x, <8 x float> %y
ret <8 x float> %sel
}
; Check that we look through cast and recognize min idiom.
define zeroext i8 @look_through_cast1(i32 %x) {
; CHECK-LABEL: @look_through_cast1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[X:%.*]], 511
; CHECK-NEXT: [[RES1:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 511
; CHECK-NEXT: [[TMP2:%.*]] = trunc i32 [[RES1]] to i8
; CHECK-NEXT: ret i8 [[TMP2]]
;
%cmp1 = icmp slt i32 %x, 511
%x_trunc = trunc i32 %x to i8
%res = select i1 %cmp1, i8 %x_trunc, i8 255
ret i8 %res
}
; Check that we look through cast but min is not recognized.
define zeroext i8 @look_through_cast2(i32 %x) {
; CHECK-LABEL: @look_through_cast2(
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[X:%.*]], 510
; CHECK-NEXT: [[X_TRUNC:%.*]] = trunc i32 [[X]] to i8
; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP1]], i8 [[X_TRUNC]], i8 -1
; CHECK-NEXT: ret i8 [[RES]]
;
%cmp1 = icmp slt i32 %x, 510
%x_trunc = trunc i32 %x to i8
%res = select i1 %cmp1, i8 %x_trunc, i8 255
ret i8 %res
}
define <2 x i8> @min_through_cast_vec1(<2 x i32> %x) {
; CHECK-LABEL: @min_through_cast_vec1(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt <2 x i32> [[X:%.*]], <i32 510, i32 511>
; CHECK-NEXT: [[RES1:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[X]], <2 x i32> <i32 510, i32 511>
; CHECK-NEXT: [[TMP2:%.*]] = trunc <2 x i32> [[RES1]] to <2 x i8>
; CHECK-NEXT: ret <2 x i8> [[TMP2]]
;
%cmp = icmp slt <2 x i32> %x, <i32 510, i32 511>
%x_trunc = trunc <2 x i32> %x to <2 x i8>
%res = select <2 x i1> %cmp, <2 x i8> %x_trunc, <2 x i8> <i8 254, i8 255>
ret <2 x i8> %res
}
define <2 x i8> @min_through_cast_vec2(<2 x i32> %x) {
; CHECK-LABEL: @min_through_cast_vec2(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt <2 x i32> [[X:%.*]], <i32 511, i32 511>
; CHECK-NEXT: [[RES1:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[X]], <2 x i32> <i32 511, i32 511>
; CHECK-NEXT: [[TMP2:%.*]] = trunc <2 x i32> [[RES1]] to <2 x i8>
; CHECK-NEXT: ret <2 x i8> [[TMP2]]
;
%cmp = icmp slt <2 x i32> %x, <i32 511, i32 511>
%x_trunc = trunc <2 x i32> %x to <2 x i8>
%res = select <2 x i1> %cmp, <2 x i8> %x_trunc, <2 x i8> <i8 255, i8 255>
ret <2 x i8> %res
}
; Remove a min/max op in a sequence with a common operand.
; PR35717: https://bugs.llvm.org/show_bug.cgi?id=35717
; min(min(a, b), min(b, c)) --> min(min(a, b), c)
define i32 @common_factor_smin(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @common_factor_smin(
; CHECK-NEXT: [[CMP_AB:%.*]] = icmp slt i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[MIN_AB:%.*]] = select i1 [[CMP_AB]], i32 [[A]], i32 [[B]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[MIN_AB]], [[C:%.*]]
; CHECK-NEXT: [[MIN_ABC:%.*]] = select i1 [[TMP1]], i32 [[MIN_AB]], i32 [[C]]
; CHECK-NEXT: ret i32 [[MIN_ABC]]
;
%cmp_ab = icmp slt i32 %a, %b
%min_ab = select i1 %cmp_ab, i32 %a, i32 %b
%cmp_bc = icmp slt i32 %b, %c
%min_bc = select i1 %cmp_bc, i32 %b, i32 %c
%cmp_ab_bc = icmp slt i32 %min_ab, %min_bc
%min_abc = select i1 %cmp_ab_bc, i32 %min_ab, i32 %min_bc
ret i32 %min_abc
}
; max(max(a, b), max(c, b)) --> max(max(a, b), c)
define <2 x i32> @common_factor_smax(<2 x i32> %a, <2 x i32> %b, <2 x i32> %c) {
; CHECK-LABEL: @common_factor_smax(
; CHECK-NEXT: [[CMP_AB:%.*]] = icmp sgt <2 x i32> [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[MAX_AB:%.*]] = select <2 x i1> [[CMP_AB]], <2 x i32> [[A]], <2 x i32> [[B]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt <2 x i32> [[MAX_AB]], [[C:%.*]]
; CHECK-NEXT: [[MAX_ABC:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[MAX_AB]], <2 x i32> [[C]]
; CHECK-NEXT: ret <2 x i32> [[MAX_ABC]]
;
%cmp_ab = icmp sgt <2 x i32> %a, %b
%max_ab = select <2 x i1> %cmp_ab, <2 x i32> %a, <2 x i32> %b
%cmp_cb = icmp sgt <2 x i32> %c, %b
%max_cb = select <2 x i1> %cmp_cb, <2 x i32> %c, <2 x i32> %b
%cmp_ab_cb = icmp sgt <2 x i32> %max_ab, %max_cb
%max_abc = select <2 x i1> %cmp_ab_cb, <2 x i32> %max_ab, <2 x i32> %max_cb
ret <2 x i32> %max_abc
}
; min(min(b, c), min(a, b)) --> min(min(b, c), a)
define <2 x i32> @common_factor_umin(<2 x i32> %a, <2 x i32> %b, <2 x i32> %c) {
; CHECK-LABEL: @common_factor_umin(
; CHECK-NEXT: [[CMP_BC:%.*]] = icmp ult <2 x i32> [[B:%.*]], [[C:%.*]]
; CHECK-NEXT: [[MIN_BC:%.*]] = select <2 x i1> [[CMP_BC]], <2 x i32> [[B]], <2 x i32> [[C]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i32> [[MIN_BC]], [[A:%.*]]
; CHECK-NEXT: [[MIN_ABC:%.*]] = select <2 x i1> [[TMP1]], <2 x i32> [[MIN_BC]], <2 x i32> [[A]]
; CHECK-NEXT: ret <2 x i32> [[MIN_ABC]]
;
%cmp_bc = icmp ult <2 x i32> %b, %c
%min_bc = select <2 x i1> %cmp_bc, <2 x i32> %b, <2 x i32> %c
%cmp_ab = icmp ult <2 x i32> %a, %b
%min_ab = select <2 x i1> %cmp_ab, <2 x i32> %a, <2 x i32> %b
%cmp_bc_ab = icmp ult <2 x i32> %min_bc, %min_ab
%min_abc = select <2 x i1> %cmp_bc_ab, <2 x i32> %min_bc, <2 x i32> %min_ab
ret <2 x i32> %min_abc
}
; max(max(b, c), max(b, a)) --> max(max(b, c), a)
define i32 @common_factor_umax(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @common_factor_umax(
; CHECK-NEXT: [[CMP_BC:%.*]] = icmp ugt i32 [[B:%.*]], [[C:%.*]]
; CHECK-NEXT: [[MAX_BC:%.*]] = select i1 [[CMP_BC]], i32 [[B]], i32 [[C]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[MAX_BC]], [[A:%.*]]
; CHECK-NEXT: [[MAX_ABC:%.*]] = select i1 [[TMP1]], i32 [[MAX_BC]], i32 [[A]]
; CHECK-NEXT: ret i32 [[MAX_ABC]]
;
%cmp_bc = icmp ugt i32 %b, %c
%max_bc = select i1 %cmp_bc, i32 %b, i32 %c
%cmp_ba = icmp ugt i32 %b, %a
%max_ba = select i1 %cmp_ba, i32 %b, i32 %a
%cmp_bc_ba = icmp ugt i32 %max_bc, %max_ba
%max_abc = select i1 %cmp_bc_ba, i32 %max_bc, i32 %max_ba
ret i32 %max_abc
}
declare void @extra_use(i32)
define i32 @common_factor_umax_extra_use_lhs(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @common_factor_umax_extra_use_lhs(
; CHECK-NEXT: [[CMP_BC:%.*]] = icmp ugt i32 [[B:%.*]], [[C:%.*]]
; CHECK-NEXT: [[MAX_BC:%.*]] = select i1 [[CMP_BC]], i32 [[B]], i32 [[C]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[MAX_BC]], [[A:%.*]]
; CHECK-NEXT: [[MAX_ABC:%.*]] = select i1 [[TMP1]], i32 [[MAX_BC]], i32 [[A]]
; CHECK-NEXT: call void @extra_use(i32 [[MAX_BC]])
; CHECK-NEXT: ret i32 [[MAX_ABC]]
;
%cmp_bc = icmp ugt i32 %b, %c
%max_bc = select i1 %cmp_bc, i32 %b, i32 %c
%cmp_ba = icmp ugt i32 %b, %a
%max_ba = select i1 %cmp_ba, i32 %b, i32 %a
%cmp_bc_ba = icmp ugt i32 %max_bc, %max_ba
%max_abc = select i1 %cmp_bc_ba, i32 %max_bc, i32 %max_ba
call void @extra_use(i32 %max_bc)
ret i32 %max_abc
}
define i32 @common_factor_umax_extra_use_rhs(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @common_factor_umax_extra_use_rhs(
; CHECK-NEXT: [[CMP_BA:%.*]] = icmp ugt i32 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: [[MAX_BA:%.*]] = select i1 [[CMP_BA]], i32 [[B]], i32 [[A]]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i32 [[MAX_BA]], [[C:%.*]]
; CHECK-NEXT: [[MAX_ABC:%.*]] = select i1 [[TMP1]], i32 [[MAX_BA]], i32 [[C]]
; CHECK-NEXT: call void @extra_use(i32 [[MAX_BA]])
; CHECK-NEXT: ret i32 [[MAX_ABC]]
;
%cmp_bc = icmp ugt i32 %b, %c
%max_bc = select i1 %cmp_bc, i32 %b, i32 %c
%cmp_ba = icmp ugt i32 %b, %a
%max_ba = select i1 %cmp_ba, i32 %b, i32 %a
%cmp_bc_ba = icmp ugt i32 %max_bc, %max_ba
%max_abc = select i1 %cmp_bc_ba, i32 %max_bc, i32 %max_ba
call void @extra_use(i32 %max_ba)
ret i32 %max_abc
}
define i32 @common_factor_umax_extra_use_both(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @common_factor_umax_extra_use_both(
; CHECK-NEXT: [[CMP_BC:%.*]] = icmp ugt i32 [[B:%.*]], [[C:%.*]]
; CHECK-NEXT: [[MAX_BC:%.*]] = select i1 [[CMP_BC]], i32 [[B]], i32 [[C]]
; CHECK-NEXT: [[CMP_BA:%.*]] = icmp ugt i32 [[B]], [[A:%.*]]
; CHECK-NEXT: [[MAX_BA:%.*]] = select i1 [[CMP_BA]], i32 [[B]], i32 [[A]]
; CHECK-NEXT: [[CMP_BC_BA:%.*]] = icmp ugt i32 [[MAX_BC]], [[MAX_BA]]
; CHECK-NEXT: [[MAX_ABC:%.*]] = select i1 [[CMP_BC_BA]], i32 [[MAX_BC]], i32 [[MAX_BA]]
; CHECK-NEXT: call void @extra_use(i32 [[MAX_BC]])
; CHECK-NEXT: call void @extra_use(i32 [[MAX_BA]])
; CHECK-NEXT: ret i32 [[MAX_ABC]]
;
%cmp_bc = icmp ugt i32 %b, %c
%max_bc = select i1 %cmp_bc, i32 %b, i32 %c
%cmp_ba = icmp ugt i32 %b, %a
%max_ba = select i1 %cmp_ba, i32 %b, i32 %a
%cmp_bc_ba = icmp ugt i32 %max_bc, %max_ba
%max_abc = select i1 %cmp_bc_ba, i32 %max_bc, i32 %max_ba
call void @extra_use(i32 %max_bc)
call void @extra_use(i32 %max_ba)
ret i32 %max_abc
}
; This would assert. Don't assume that earlier min/max types match a possible later min/max.
define float @not_min_of_min(i8 %i, float %x) {
; CHECK-LABEL: @not_min_of_min(
; CHECK-NEXT: [[CMP1_INV:%.*]] = fcmp fast oge float [[X:%.*]], 1.000000e+00
; CHECK-NEXT: [[TMP1:%.*]] = select fast i1 [[CMP1_INV]], float 1.000000e+00, float [[X]]
; CHECK-NEXT: [[CMP2_INV:%.*]] = fcmp fast oge float [[X]], 2.000000e+00
; CHECK-NEXT: [[TMP2:%.*]] = select fast i1 [[CMP2_INV]], float 2.000000e+00, float [[X]]
; CHECK-NEXT: [[CMP3:%.*]] = icmp ult i8 [[I:%.*]], 16
; CHECK-NEXT: [[R:%.*]] = select i1 [[CMP3]], float [[TMP1]], float [[TMP2]]
; CHECK-NEXT: ret float [[R]]
;
%cmp1 = fcmp fast ult float %x, 1.0
%min1 = select i1 %cmp1, float %x, float 1.0
%cmp2 = fcmp fast ult float %x, 2.0
%min2 = select i1 %cmp2, float %x, float 2.0
%cmp3 = icmp ult i8 %i, 16
%r = select i1 %cmp3, float %min1, float %min2
ret float %r
}
define i32 @add_umin(i32 %x) {
; CHECK-LABEL: @add_umin(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[X:%.*]], 27
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 27
; CHECK-NEXT: [[R:%.*]] = add nuw nsw i32 [[TMP2]], 15
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nuw i32 %x, 15
%c = icmp ult i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
define i32 @add_umin_constant_limit(i32 %x) {
; CHECK-LABEL: @add_umin_constant_limit(
; CHECK-NEXT: [[DOTNOT:%.*]] = icmp eq i32 [[X:%.*]], 0
; CHECK-NEXT: [[R:%.*]] = select i1 [[DOTNOT]], i32 41, i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nuw i32 %x, 41
%c = icmp ult i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
; TODO: assert that instsimplify always gets this?
define i32 @add_umin_simplify(i32 %x) {
; CHECK-LABEL: @add_umin_simplify(
; CHECK-NEXT: ret i32 42
;
%a = add nuw i32 %x, 42
%c = icmp ult i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
; TODO: assert that instsimplify always gets this?
define i32 @add_umin_simplify2(i32 %x) {
; CHECK-LABEL: @add_umin_simplify2(
; CHECK-NEXT: ret i32 42
;
%a = add nuw i32 %x, 43
%c = icmp ult i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
define i32 @add_umin_wrong_pred(i32 %x) {
; CHECK-LABEL: @add_umin_wrong_pred(
; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 15
; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nuw i32 %x, 15
%c = icmp slt i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
define i32 @add_umin_wrong_wrap(i32 %x) {
; CHECK-LABEL: @add_umin_wrong_wrap(
; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 15
; CHECK-NEXT: [[C:%.*]] = icmp ult i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nsw i32 %x, 15
%c = icmp ult i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
define i32 @add_umin_extra_use(i32 %x, i32* %p) {
; CHECK-LABEL: @add_umin_extra_use(
; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 15
; CHECK-NEXT: store i32 [[A]], i32* [[P:%.*]], align 4
; CHECK-NEXT: [[C:%.*]] = icmp ult i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nuw i32 %x, 15
store i32 %a, i32* %p
%c = icmp ult i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
define <2 x i16> @add_umin_vec(<2 x i16> %x) {
; CHECK-LABEL: @add_umin_vec(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i16> [[X:%.*]], <i16 225, i16 225>
; CHECK-NEXT: [[TMP2:%.*]] = select <2 x i1> [[TMP1]], <2 x i16> [[X]], <2 x i16> <i16 225, i16 225>
; CHECK-NEXT: [[R:%.*]] = add nuw nsw <2 x i16> [[TMP2]], <i16 15, i16 15>
; CHECK-NEXT: ret <2 x i16> [[R]]
;
%a = add nuw <2 x i16> %x, <i16 15, i16 15>
%c = icmp ult <2 x i16> %a, <i16 240, i16 240>
%r = select <2 x i1> %c, <2 x i16> %a, <2 x i16> <i16 240, i16 240>
ret <2 x i16> %r
}
define i37 @add_umax(i37 %x) {
; CHECK-LABEL: @add_umax(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i37 [[X:%.*]], 37
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i37 [[X]], i37 37
; CHECK-NEXT: [[R:%.*]] = add nuw i37 [[TMP2]], 5
; CHECK-NEXT: ret i37 [[R]]
;
%a = add nuw i37 %x, 5
%c = icmp ugt i37 %a, 42
%r = select i1 %c, i37 %a, i37 42
ret i37 %r
}
define i37 @add_umax_constant_limit(i37 %x) {
; CHECK-LABEL: @add_umax_constant_limit(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i37 [[X:%.*]], 1
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i37 [[X]], i37 1
; CHECK-NEXT: [[R:%.*]] = add nuw i37 [[TMP2]], 81
; CHECK-NEXT: ret i37 [[R]]
;
%a = add nuw i37 %x, 81
%c = icmp ugt i37 %a, 82
%r = select i1 %c, i37 %a, i37 82
ret i37 %r
}
; Negative test
; TODO: assert that instsimplify always gets this?
define i37 @add_umax_simplify(i37 %x) {
; CHECK-LABEL: @add_umax_simplify(
; CHECK-NEXT: [[A:%.*]] = add i37 [[X:%.*]], 42
; CHECK-NEXT: ret i37 [[A]]
;
%a = add nuw i37 %x, 42
%c = icmp ugt i37 %a, 42
%r = select i1 %c, i37 %a, i37 42
ret i37 %r
}
; Negative test
; TODO: assert that instsimplify always gets this?
define i32 @add_umax_simplify2(i32 %x) {
; CHECK-LABEL: @add_umax_simplify2(
; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 57
; CHECK-NEXT: ret i32 [[A]]
;
%a = add nuw i32 %x, 57
%c = icmp ugt i32 %a, 56
%r = select i1 %c, i32 %a, i32 56
ret i32 %r
}
; Negative test
define i32 @add_umax_wrong_pred(i32 %x) {
; CHECK-LABEL: @add_umax_wrong_pred(
; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 15
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nuw i32 %x, 15
%c = icmp sgt i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
define i32 @add_umax_wrong_wrap(i32 %x) {
; CHECK-LABEL: @add_umax_wrong_wrap(
; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 15
; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nsw i32 %x, 15
%c = icmp ugt i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
define i32 @add_umax_extra_use(i32 %x, i32* %p) {
; CHECK-LABEL: @add_umax_extra_use(
; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 15
; CHECK-NEXT: store i32 [[A]], i32* [[P:%.*]], align 4
; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nuw i32 %x, 15
store i32 %a, i32* %p
%c = icmp ugt i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
define <2 x i33> @add_umax_vec(<2 x i33> %x) {
; CHECK-LABEL: @add_umax_vec(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt <2 x i33> [[X:%.*]], <i33 235, i33 235>
; CHECK-NEXT: [[TMP2:%.*]] = select <2 x i1> [[TMP1]], <2 x i33> [[X]], <2 x i33> <i33 235, i33 235>
; CHECK-NEXT: [[R:%.*]] = add nuw <2 x i33> [[TMP2]], <i33 5, i33 5>
; CHECK-NEXT: ret <2 x i33> [[R]]
;
%a = add nuw <2 x i33> %x, <i33 5, i33 5>
%c = icmp ugt <2 x i33> %a, <i33 240, i33 240>
%r = select <2 x i1> %c, <2 x i33> %a, <2 x i33> <i33 240, i33 240>
ret <2 x i33> %r
}
define i8 @PR14613_umin(i8 %x) {
; CHECK-LABEL: @PR14613_umin(
; CHECK-NEXT: [[TMP1:%.*]] = call i8 @llvm.uadd.sat.i8(i8 [[X:%.*]], i8 15)
; CHECK-NEXT: ret i8 [[TMP1]]
;
%u4 = zext i8 %x to i32
%u5 = add nuw nsw i32 %u4, 15
%u6 = icmp ult i32 %u5, 255
%u7 = select i1 %u6, i32 %u5, i32 255
%r = trunc i32 %u7 to i8
ret i8 %r
}
define i8 @PR14613_umax(i8 %x) {
; CHECK-LABEL: @PR14613_umax(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[X:%.*]], -16
; CHECK-NEXT: [[X_OP:%.*]] = add i8 [[X]], 15
; CHECK-NEXT: [[U7:%.*]] = select i1 [[TMP1]], i8 [[X_OP]], i8 -1
; CHECK-NEXT: ret i8 [[U7]]
;
%u4 = zext i8 %x to i32
%u5 = add nuw nsw i32 %u4, 15
%u6 = icmp ugt i32 %u5, 255
%u7 = select i1 %u6, i32 %u5, i32 255
%r = trunc i32 %u7 to i8
ret i8 %r
}
define i32 @add_smin(i32 %x) {
; CHECK-LABEL: @add_smin(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[X:%.*]], 27
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 27
; CHECK-NEXT: [[R:%.*]] = add nsw i32 [[TMP2]], 15
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nsw i32 %x, 15
%c = icmp slt i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
define i32 @add_smin_constant_limit(i32 %x) {
; CHECK-LABEL: @add_smin_constant_limit(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[X:%.*]], 2147483646
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[X]], i32 2147483646
; CHECK-NEXT: [[R:%.*]] = add nsw i32 [[TMP2]], -3
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nsw i32 %x, -3
%c = icmp slt i32 %a, 2147483643
%r = select i1 %c, i32 %a, i32 2147483643
ret i32 %r
}
; Negative test
; TODO: assert that instsimplify always gets this?
define i32 @add_smin_simplify(i32 %x) {
; CHECK-LABEL: @add_smin_simplify(
; CHECK-NEXT: [[R:%.*]] = add nsw i32 [[X:%.*]], -3
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nsw i32 %x, -3
%c = icmp slt i32 %a, 2147483644
%r = select i1 %c, i32 %a, i32 2147483644
ret i32 %r
}
; Negative test
; TODO: assert that instsimplify always gets this?
define i32 @add_smin_simplify2(i32 %x) {
; CHECK-LABEL: @add_smin_simplify2(
; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], -3
; CHECK-NEXT: ret i32 [[A]]
;
%a = add nsw i32 %x, -3
%c = icmp slt i32 %a, 2147483645
%r = select i1 %c, i32 %a, i32 2147483645
ret i32 %r
}
; Negative test
define i32 @add_smin_wrong_pred(i32 %x) {
; CHECK-LABEL: @add_smin_wrong_pred(
; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 15
; CHECK-NEXT: [[C:%.*]] = icmp ult i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nsw i32 %x, 15
%c = icmp ult i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
define i32 @add_smin_wrong_wrap(i32 %x) {
; CHECK-LABEL: @add_smin_wrong_wrap(
; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 15
; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nuw i32 %x, 15
%c = icmp slt i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
define i32 @add_smin_extra_use(i32 %x, i32* %p) {
; CHECK-LABEL: @add_smin_extra_use(
; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 15
; CHECK-NEXT: store i32 [[A]], i32* [[P:%.*]], align 4
; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nsw i32 %x, 15
store i32 %a, i32* %p
%c = icmp slt i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
define <2 x i16> @add_smin_vec(<2 x i16> %x) {
; CHECK-LABEL: @add_smin_vec(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt <2 x i16> [[X:%.*]], <i16 225, i16 225>
; CHECK-NEXT: [[TMP2:%.*]] = select <2 x i1> [[TMP1]], <2 x i16> [[X]], <2 x i16> <i16 225, i16 225>
; CHECK-NEXT: [[R:%.*]] = add nsw <2 x i16> [[TMP2]], <i16 15, i16 15>
; CHECK-NEXT: ret <2 x i16> [[R]]
;
%a = add nsw <2 x i16> %x, <i16 15, i16 15>
%c = icmp slt <2 x i16> %a, <i16 240, i16 240>
%r = select <2 x i1> %c, <2 x i16> %a, <2 x i16> <i16 240, i16 240>
ret <2 x i16> %r
}
define i37 @add_smax(i37 %x) {
; CHECK-LABEL: @add_smax(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i37 [[X:%.*]], 37
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i37 [[X]], i37 37
; CHECK-NEXT: [[R:%.*]] = add nuw nsw i37 [[TMP2]], 5
; CHECK-NEXT: ret i37 [[R]]
;
%a = add nsw i37 %x, 5
%c = icmp sgt i37 %a, 42
%r = select i1 %c, i37 %a, i37 42
ret i37 %r
}
define i8 @add_smax_constant_limit(i8 %x) {
; CHECK-LABEL: @add_smax_constant_limit(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i8 [[X:%.*]], -127
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i8 [[X]], i8 -127
; CHECK-NEXT: [[R:%.*]] = add nsw i8 [[TMP2]], 125
; CHECK-NEXT: ret i8 [[R]]
;
%a = add nsw i8 %x, 125
%c = icmp sgt i8 %a, -2
%r = select i1 %c, i8 %a, i8 -2
ret i8 %r
}
; Negative test
; TODO: assert that instsimplify always gets this?
define i8 @add_smax_simplify(i8 %x) {
; CHECK-LABEL: @add_smax_simplify(
; CHECK-NEXT: [[R:%.*]] = add nsw i8 [[X:%.*]], 126
; CHECK-NEXT: ret i8 [[R]]
;
%a = add nsw i8 %x, 126
%c = icmp sgt i8 %a, -2
%r = select i1 %c, i8 %a, i8 -2
ret i8 %r
}
; Negative test
; TODO: assert that instsimplify always gets this?
define i8 @add_smax_simplify2(i8 %x) {
; CHECK-LABEL: @add_smax_simplify2(
; CHECK-NEXT: [[A:%.*]] = add nsw i8 [[X:%.*]], 127
; CHECK-NEXT: ret i8 [[A]]
;
%a = add nsw i8 %x, 127
%c = icmp sgt i8 %a, -2
%r = select i1 %c, i8 %a, i8 -2
ret i8 %r
}
; Negative test
define i32 @add_smax_wrong_pred(i32 %x) {
; CHECK-LABEL: @add_smax_wrong_pred(
; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 15
; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nsw i32 %x, 15
%c = icmp ugt i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
define i32 @add_smax_wrong_wrap(i32 %x) {
; CHECK-LABEL: @add_smax_wrong_wrap(
; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 15
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nuw i32 %x, 15
%c = icmp sgt i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
; Negative test
define i32 @add_smax_extra_use(i32 %x, i32* %p) {
; CHECK-LABEL: @add_smax_extra_use(
; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 15
; CHECK-NEXT: store i32 [[A]], i32* [[P:%.*]], align 4
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 [[A]], 42
; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nsw i32 %x, 15
store i32 %a, i32* %p
%c = icmp sgt i32 %a, 42
%r = select i1 %c, i32 %a, i32 42
ret i32 %r
}
define <2 x i33> @add_smax_vec(<2 x i33> %x) {
; CHECK-LABEL: @add_smax_vec(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt <2 x i33> [[X:%.*]], <i33 235, i33 235>
; CHECK-NEXT: [[TMP2:%.*]] = select <2 x i1> [[TMP1]], <2 x i33> [[X]], <2 x i33> <i33 235, i33 235>
; CHECK-NEXT: [[R:%.*]] = add nuw nsw <2 x i33> [[TMP2]], <i33 5, i33 5>
; CHECK-NEXT: ret <2 x i33> [[R]]
;
%a = add nsw <2 x i33> %x, <i33 5, i33 5>
%c = icmp sgt <2 x i33> %a, <i33 240, i33 240>
%r = select <2 x i1> %c, <2 x i33> %a, <2 x i33> <i33 240, i33 240>
ret <2 x i33> %r
}
define i8 @PR14613_smin(i8 %x) {
; CHECK-LABEL: @PR14613_smin(
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i8 [[X:%.*]], 40
; CHECK-NEXT: [[X_OP:%.*]] = add i8 [[X]], 15
; CHECK-NEXT: [[U7:%.*]] = select i1 [[TMP1]], i8 [[X_OP]], i8 55
; CHECK-NEXT: ret i8 [[U7]]
;
%u4 = sext i8 %x to i32
%u5 = add nuw nsw i32 %u4, 15
%u6 = icmp slt i32 %u5, 55
%u7 = select i1 %u6, i32 %u5, i32 55
%r = trunc i32 %u7 to i8
ret i8 %r
}
define i8 @PR14613_smax(i8 %x) {
; CHECK-LABEL: @PR14613_smax(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i8 [[X:%.*]], 40
; CHECK-NEXT: [[X_OP:%.*]] = add i8 [[X]], 15
; CHECK-NEXT: [[U7:%.*]] = select i1 [[TMP1]], i8 [[X_OP]], i8 55
; CHECK-NEXT: ret i8 [[U7]]
;
%u4 = sext i8 %x to i32
%u5 = add nuw nsw i32 %u4, 15
%u6 = icmp sgt i32 %u5, 55
%u7 = select i1 %u6, i32 %u5, i32 55
%r = trunc i32 %u7 to i8
ret i8 %r
}
define i8 @PR46271(<2 x i8> %x) {
; CHECK-LABEL: @PR46271(
; CHECK-NEXT: [[A:%.*]] = icmp sgt <2 x i8> [[X:%.*]], <i8 -1, i8 -1>
; CHECK-NEXT: [[B:%.*]] = select <2 x i1> [[A]], <2 x i8> [[X]], <2 x i8> <i8 poison, i8 -1>
; CHECK-NEXT: [[TMP1:%.*]] = extractelement <2 x i8> [[B]], i32 1
; CHECK-NEXT: [[R:%.*]] = xor i8 [[TMP1]], -1
; CHECK-NEXT: ret i8 [[R]]
;
%a = icmp sgt <2 x i8> %x, <i8 -1, i8 -1>
%b = select <2 x i1> %a, <2 x i8> %x, <2 x i8> <i8 undef, i8 -1>
%not = xor <2 x i8> %b, <i8 undef, i8 -1>
%r = extractelement <2 x i8> %not, i32 1
ret i8 %r
}
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