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llvm-project/llvm/test/Transforms/SCCP/ip-ranges-casts.ll
Florian Hahn 72121a20cd
[SCCP] Use range info to prove AddInst has NSW flag. 
This patch updates SCCP to use the value ranges of AddInst operands to
try to prove the AddInst does not overflow in the signed sense and
adds the NSW flag. The reasoning is done with
makeGuaranteedNoWrapRegion (thanks @nikic for point it out!).

Follow-ups will include extending this to more
OverflowingBinaryOperators.

Depends on D142387.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D142390
2023-01-27 14:09:26 +00:00

340 lines
12 KiB
LLVM
Raw Blame History

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=ipsccp -S | FileCheck %s
; x = [100, 301)
define internal i1 @f.trunc(i32 %x) {
; CHECK-LABEL: @f.trunc(
; CHECK-NEXT: [[T_1:%.*]] = trunc i32 [[X:%.*]] to i16
; CHECK-NEXT: [[C_2:%.*]] = icmp sgt i16 [[T_1]], 299
; CHECK-NEXT: [[C_4:%.*]] = icmp slt i16 [[T_1]], 101
; CHECK-NEXT: [[RES_1:%.*]] = add nuw nsw i1 false, [[C_2]]
; CHECK-NEXT: [[RES_2:%.*]] = add nuw nsw i1 [[RES_1]], false
; CHECK-NEXT: [[RES_3:%.*]] = add i1 [[RES_2]], [[C_4]]
; CHECK-NEXT: [[T_2:%.*]] = trunc i32 [[X]] to i8
; CHECK-NEXT: [[C_5:%.*]] = icmp sgt i8 [[T_2]], 44
; CHECK-NEXT: [[C_6:%.*]] = icmp sgt i8 [[T_2]], 43
; CHECK-NEXT: [[C_7:%.*]] = icmp slt i8 [[T_2]], 100
; CHECK-NEXT: [[C_8:%.*]] = icmp slt i8 [[T_2]], 101
; CHECK-NEXT: [[RES_4:%.*]] = add i1 [[RES_3]], [[C_5]]
; CHECK-NEXT: [[RES_5:%.*]] = add i1 [[RES_4]], [[C_6]]
; CHECK-NEXT: [[RES_6:%.*]] = add i1 [[RES_5]], [[C_7]]
; CHECK-NEXT: [[RES_7:%.*]] = add i1 [[RES_6]], [[C_8]]
; CHECK-NEXT: ret i1 [[RES_7]]
;
%t.1 = trunc i32 %x to i16
%c.1 = icmp sgt i16 %t.1, 300
%c.2 = icmp sgt i16 %t.1, 299
%c.3 = icmp slt i16 %t.1, 100
%c.4 = icmp slt i16 %t.1, 101
%res.1 = add i1 %c.1, %c.2
%res.2 = add i1 %res.1, %c.3
%res.3 = add i1 %res.2, %c.4
%t.2 = trunc i32 %x to i8
%c.5 = icmp sgt i8 %t.2, 300
%c.6 = icmp sgt i8 %t.2, 299
%c.7 = icmp slt i8 %t.2, 100
%c.8 = icmp slt i8 %t.2, 101
%res.4 = add i1 %res.3, %c.5
%res.5 = add i1 %res.4, %c.6
%res.6 = add i1 %res.5, %c.7
%res.7 = add i1 %res.6, %c.8
ret i1 %res.7
}
define i1 @caller1() {
; CHECK-LABEL: @caller1(
; CHECK-NEXT: [[CALL_1:%.*]] = tail call i1 @f.trunc(i32 100)
; CHECK-NEXT: [[CALL_2:%.*]] = tail call i1 @f.trunc(i32 300)
; CHECK-NEXT: [[RES:%.*]] = and i1 [[CALL_1]], [[CALL_2]]
; CHECK-NEXT: ret i1 [[RES]]
;
%call.1 = tail call i1 @f.trunc(i32 100)
%call.2 = tail call i1 @f.trunc(i32 300)
%res = and i1 %call.1, %call.2
ret i1 %res
}
; x = [100, 301)
define internal i1 @f.zext(i32 %x, i32 %y) {
; CHECK-LABEL: @f.zext(
; CHECK-NEXT: [[T_1:%.*]] = zext i32 [[X:%.*]] to i64
; CHECK-NEXT: [[C_2:%.*]] = icmp sgt i64 [[T_1]], 299
; CHECK-NEXT: [[C_4:%.*]] = icmp slt i64 [[T_1]], 101
; CHECK-NEXT: [[RES_1:%.*]] = add nuw nsw i1 false, [[C_2]]
; CHECK-NEXT: [[RES_2:%.*]] = add nuw nsw i1 [[RES_1]], false
; CHECK-NEXT: [[RES_3:%.*]] = add i1 [[RES_2]], [[C_4]]
; CHECK-NEXT: [[T_2:%.*]] = zext i32 [[Y:%.*]] to i64
; CHECK-NEXT: [[C_5:%.*]] = icmp sgt i64 [[T_2]], 300
; CHECK-NEXT: [[C_6:%.*]] = icmp sgt i64 [[T_2]], 299
; CHECK-NEXT: [[C_8:%.*]] = icmp slt i64 [[T_2]], 1
; CHECK-NEXT: [[RES_4:%.*]] = add i1 [[RES_3]], [[C_5]]
; CHECK-NEXT: [[RES_5:%.*]] = add i1 [[RES_4]], [[C_6]]
; CHECK-NEXT: [[RES_6:%.*]] = add nuw nsw i1 [[RES_5]], false
; CHECK-NEXT: [[RES_7:%.*]] = add i1 [[RES_6]], [[C_8]]
; CHECK-NEXT: ret i1 [[RES_7]]
;
%t.1 = zext i32 %x to i64
%c.1 = icmp sgt i64 %t.1, 300
%c.2 = icmp sgt i64 %t.1, 299
%c.3 = icmp slt i64 %t.1, 100
%c.4 = icmp slt i64 %t.1, 101
%res.1 = add i1 %c.1, %c.2
%res.2 = add i1 %res.1, %c.3
%res.3 = add i1 %res.2, %c.4
%t.2 = zext i32 %y to i64
%c.5 = icmp sgt i64 %t.2, 300
%c.6 = icmp sgt i64 %t.2, 299
%c.7 = icmp slt i64 %t.2, 0
%c.8 = icmp slt i64 %t.2, 1
%res.4 = add i1 %res.3, %c.5
%res.5 = add i1 %res.4, %c.6
%res.6 = add i1 %res.5, %c.7
%res.7 = add i1 %res.6, %c.8
ret i1 %res.7
}
define i1 @caller.zext() {
; CHECK-LABEL: @caller.zext(
; CHECK-NEXT: [[CALL_1:%.*]] = tail call i1 @f.zext(i32 100, i32 -120)
; CHECK-NEXT: [[CALL_2:%.*]] = tail call i1 @f.zext(i32 300, i32 900)
; CHECK-NEXT: [[RES:%.*]] = and i1 [[CALL_1]], [[CALL_2]]
; CHECK-NEXT: ret i1 [[RES]]
;
%call.1 = tail call i1 @f.zext(i32 100, i32 -120)
%call.2 = tail call i1 @f.zext(i32 300, i32 900)
%res = and i1 %call.1, %call.2
ret i1 %res
}
; x = [100, 301)
define internal i1 @f.sext(i32 %x, i32 %y) {
; CHECK-LABEL: @f.sext(
; CHECK-NEXT: [[T_1:%.*]] = zext i32 [[X:%.*]] to i64
; CHECK-NEXT: [[C_2:%.*]] = icmp sgt i64 [[T_1]], 299
; CHECK-NEXT: [[C_4:%.*]] = icmp slt i64 [[T_1]], 101
; CHECK-NEXT: [[RES_1:%.*]] = add nuw nsw i1 false, [[C_2]]
; CHECK-NEXT: [[RES_2:%.*]] = add nuw nsw i1 [[RES_1]], false
; CHECK-NEXT: [[RES_3:%.*]] = add i1 [[RES_2]], [[C_4]]
; CHECK-NEXT: [[T_2:%.*]] = sext i32 [[Y:%.*]] to i64
; CHECK-NEXT: [[C_6:%.*]] = icmp sgt i64 [[T_2]], 899
; CHECK-NEXT: [[C_8:%.*]] = icmp slt i64 [[T_2]], -119
; CHECK-NEXT: [[RES_4:%.*]] = add nuw nsw i1 [[RES_3]], false
; CHECK-NEXT: [[RES_5:%.*]] = add i1 [[RES_4]], [[C_6]]
; CHECK-NEXT: [[RES_6:%.*]] = add nuw nsw i1 [[RES_5]], false
; CHECK-NEXT: [[RES_7:%.*]] = add i1 [[RES_6]], [[C_8]]
; CHECK-NEXT: ret i1 [[RES_7]]
;
%t.1 = sext i32 %x to i64
%c.1 = icmp sgt i64 %t.1, 300
%c.2 = icmp sgt i64 %t.1, 299
%c.3 = icmp slt i64 %t.1, 100
%c.4 = icmp slt i64 %t.1, 101
%res.1 = add i1 %c.1, %c.2
%res.2 = add i1 %res.1, %c.3
%res.3 = add i1 %res.2, %c.4
%t.2 = sext i32 %y to i64
%c.5 = icmp sgt i64 %t.2, 900
%c.6 = icmp sgt i64 %t.2, 899
%c.7 = icmp slt i64 %t.2, -120
%c.8 = icmp slt i64 %t.2, -119
%res.4 = add i1 %res.3, %c.5
%res.5 = add i1 %res.4, %c.6
%res.6 = add i1 %res.5, %c.7
%res.7 = add i1 %res.6, %c.8
ret i1 %res.7
}
define i1 @caller.sext() {
; CHECK-LABEL: @caller.sext(
; CHECK-NEXT: [[CALL_1:%.*]] = tail call i1 @f.sext(i32 100, i32 -120)
; CHECK-NEXT: [[CALL_2:%.*]] = tail call i1 @f.sext(i32 300, i32 900)
; CHECK-NEXT: [[RES:%.*]] = and i1 [[CALL_1]], [[CALL_2]]
; CHECK-NEXT: ret i1 [[RES]]
;
%call.1 = tail call i1 @f.sext(i32 100, i32 -120)
%call.2 = tail call i1 @f.sext(i32 300, i32 900)
%res = and i1 %call.1, %call.2
ret i1 %res
}
; There's nothing we can do besides going to the full range or overdefined.
define internal i1 @f.fptosi(i32 %x) {
; CHECK-LABEL: @f.fptosi(
; CHECK-NEXT: [[TO_DOUBLE:%.*]] = sitofp i32 [[X:%.*]] to double
; CHECK-NEXT: [[ADD:%.*]] = fadd double 0.000000e+00, [[TO_DOUBLE]]
; CHECK-NEXT: [[TO_I32:%.*]] = fptosi double [[ADD]] to i32
; CHECK-NEXT: [[C_1:%.*]] = icmp sgt i32 [[TO_I32]], 300
; CHECK-NEXT: [[C_2:%.*]] = icmp sgt i32 [[TO_I32]], 299
; CHECK-NEXT: [[C_3:%.*]] = icmp slt i32 [[TO_I32]], 100
; CHECK-NEXT: [[C_4:%.*]] = icmp slt i32 [[TO_I32]], 101
; CHECK-NEXT: [[RES_1:%.*]] = add i1 [[C_1]], [[C_2]]
; CHECK-NEXT: [[RES_2:%.*]] = add i1 [[RES_1]], [[C_3]]
; CHECK-NEXT: [[RES_3:%.*]] = add i1 [[RES_2]], [[C_4]]
; CHECK-NEXT: ret i1 [[RES_3]]
;
%to.double = sitofp i32 %x to double
%add = fadd double 0.000000e+00, %to.double
%to.i32 = fptosi double %add to i32
%c.1 = icmp sgt i32 %to.i32, 300
%c.2 = icmp sgt i32 %to.i32, 299
%c.3 = icmp slt i32 %to.i32, 100
%c.4 = icmp slt i32 %to.i32, 101
%res.1 = add i1 %c.1, %c.2
%res.2 = add i1 %res.1, %c.3
%res.3 = add i1 %res.2, %c.4
ret i1 %res.3
}
define i1 @caller.fptosi() {
; CHECK-LABEL: @caller.fptosi(
; CHECK-NEXT: [[CALL_1:%.*]] = tail call i1 @f.fptosi(i32 100)
; CHECK-NEXT: [[CALL_2:%.*]] = tail call i1 @f.fptosi(i32 300)
; CHECK-NEXT: [[RES:%.*]] = and i1 [[CALL_1]], [[CALL_2]]
; CHECK-NEXT: ret i1 [[RES]]
;
%call.1 = tail call i1 @f.fptosi(i32 100)
%call.2 = tail call i1 @f.fptosi(i32 300)
%res = and i1 %call.1, %call.2
ret i1 %res
}
; There's nothing we can do besides going to the full range or overdefined.
define internal i1 @f.fpext(i16 %x) {
; CHECK-LABEL: @f.fpext(
; CHECK-NEXT: [[TO_FLOAT:%.*]] = sitofp i16 [[X:%.*]] to float
; CHECK-NEXT: [[TO_DOUBLE:%.*]] = fpext float [[TO_FLOAT]] to double
; CHECK-NEXT: [[TO_I64:%.*]] = fptoui float [[TO_FLOAT]] to i64
; CHECK-NEXT: [[C_1:%.*]] = icmp sgt i64 [[TO_I64]], 300
; CHECK-NEXT: [[C_2:%.*]] = icmp sgt i64 [[TO_I64]], 299
; CHECK-NEXT: [[C_3:%.*]] = icmp slt i64 [[TO_I64]], 100
; CHECK-NEXT: [[C_4:%.*]] = icmp slt i64 [[TO_I64]], 101
; CHECK-NEXT: [[RES_1:%.*]] = add i1 [[C_1]], [[C_2]]
; CHECK-NEXT: [[RES_2:%.*]] = add i1 [[RES_1]], [[C_3]]
; CHECK-NEXT: [[RES_3:%.*]] = add i1 [[RES_2]], [[C_4]]
; CHECK-NEXT: ret i1 [[RES_3]]
;
%to.float = sitofp i16 %x to float
%to.double = fpext float %to.float to double
%to.i64= fptoui float %to.float to i64
%c.1 = icmp sgt i64 %to.i64, 300
%c.2 = icmp sgt i64 %to.i64, 299
%c.3 = icmp slt i64 %to.i64, 100
%c.4 = icmp slt i64 %to.i64, 101
%res.1 = add i1 %c.1, %c.2
%res.2 = add i1 %res.1, %c.3
%res.3 = add i1 %res.2, %c.4
ret i1 %res.3
}
; There's nothing we can do besides going to the full range or overdefined.
define i1 @caller.fpext() {
; CHECK-LABEL: @caller.fpext(
; CHECK-NEXT: [[CALL_1:%.*]] = tail call i1 @f.fpext(i16 100)
; CHECK-NEXT: [[CALL_2:%.*]] = tail call i1 @f.fpext(i16 300)
; CHECK-NEXT: [[RES:%.*]] = and i1 [[CALL_1]], [[CALL_2]]
; CHECK-NEXT: ret i1 [[RES]]
;
%call.1 = tail call i1 @f.fpext(i16 100)
%call.2 = tail call i1 @f.fpext(i16 300)
%res = and i1 %call.1, %call.2
ret i1 %res
}
; There's nothing we can do besides going to the full range or overdefined.
define internal i1 @f.inttoptr.ptrtoint(i64 %x) {
; CHECK-LABEL: @f.inttoptr.ptrtoint(
; CHECK-NEXT: [[TO_PTR:%.*]] = inttoptr i64 [[X:%.*]] to ptr
; CHECK-NEXT: [[TO_I64:%.*]] = ptrtoint ptr [[TO_PTR]] to i64
; CHECK-NEXT: [[C_1:%.*]] = icmp sgt i64 [[TO_I64]], 300
; CHECK-NEXT: [[C_2:%.*]] = icmp sgt i64 [[TO_I64]], 299
; CHECK-NEXT: [[C_3:%.*]] = icmp slt i64 [[TO_I64]], 100
; CHECK-NEXT: [[C_4:%.*]] = icmp slt i64 [[TO_I64]], 101
; CHECK-NEXT: [[RES_1:%.*]] = add i1 [[C_1]], [[C_2]]
; CHECK-NEXT: [[RES_2:%.*]] = add i1 [[RES_1]], [[C_3]]
; CHECK-NEXT: [[RES_3:%.*]] = add i1 [[RES_2]], [[C_4]]
; CHECK-NEXT: ret i1 [[RES_3]]
;
%to.ptr = inttoptr i64 %x to ptr
%to.i64 = ptrtoint ptr %to.ptr to i64
%c.1 = icmp sgt i64 %to.i64, 300
%c.2 = icmp sgt i64 %to.i64, 299
%c.3 = icmp slt i64 %to.i64, 100
%c.4 = icmp slt i64 %to.i64, 101
%res.1 = add i1 %c.1, %c.2
%res.2 = add i1 %res.1, %c.3
%res.3 = add i1 %res.2, %c.4
ret i1 %res.3
}
define i1 @caller.inttoptr.ptrtoint() {
; CHECK-LABEL: @caller.inttoptr.ptrtoint(
; CHECK-NEXT: [[CALL_1:%.*]] = tail call i1 @f.inttoptr.ptrtoint(i64 100)
; CHECK-NEXT: [[CALL_2:%.*]] = tail call i1 @f.inttoptr.ptrtoint(i64 300)
; CHECK-NEXT: [[RES:%.*]] = and i1 [[CALL_1]], [[CALL_2]]
; CHECK-NEXT: ret i1 [[RES]]
;
%call.1 = tail call i1 @f.inttoptr.ptrtoint(i64 100)
%call.2 = tail call i1 @f.inttoptr.ptrtoint(i64 300)
%res = and i1 %call.1, %call.2
ret i1 %res
}
; Make sure we do not create constant ranges for int to fp casts.
define i1 @int_range_to_double_cast(i32 %a) {
; CHECK-LABEL: @int_range_to_double_cast(
; CHECK-NEXT: [[R:%.*]] = and i32 [[A:%.*]], 255
; CHECK-NEXT: [[T4:%.*]] = sitofp i32 [[R]] to double
; CHECK-NEXT: [[T10:%.*]] = fadd double 0.000000e+00, [[T4]]
; CHECK-NEXT: [[T11:%.*]] = fcmp olt double [[T4]], [[T10]]
; CHECK-NEXT: ret i1 [[T11]]
;
%r = and i32 %a, 255
%t4 = sitofp i32 %r to double
%t10 = fadd double 0.000000e+00, %t4
%t11 = fcmp olt double %t4, %t10
ret i1 %t11
}
; Make sure we do not use ranges to propagate info from vectors.
define i16 @vector_binop_and_cast() {
; CHECK-LABEL: @vector_binop_and_cast(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[VECINIT7:%.*]] = insertelement <8 x i16> <i16 undef, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7>, i16 undef, i32 0
; CHECK-NEXT: [[REM:%.*]] = srem <8 x i16> <i16 2, i16 2, i16 2, i16 2, i16 2, i16 2, i16 2, i16 2>, [[VECINIT7]]
; CHECK-NEXT: [[TMP0:%.*]] = bitcast <8 x i16> [[REM]] to i128
; CHECK-NEXT: [[TMP1:%.*]] = trunc i128 [[TMP0]] to i16
; CHECK-NEXT: ret i16 [[TMP1]]
;
entry:
%vecinit7 = insertelement <8 x i16> <i16 undef, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7>, i16 undef, i32 0
%rem = srem <8 x i16> <i16 2, i16 2, i16 2, i16 2, i16 2, i16 2, i16 2, i16 2>, %vecinit7
%0 = bitcast <8 x i16> %rem to i128
%1 = trunc i128 %0 to i16
ret i16 %1
}
define internal i64 @f.sext_to_zext(i32 %t) {
; CHECK-LABEL: @f.sext_to_zext(
; CHECK-NEXT: [[A:%.*]] = zext i32 [[T:%.*]] to i64
; CHECK-NEXT: ret i64 [[A]]
;
%a = sext i32 %t to i64
ret i64 %a
}
define i64 @caller.sext_to_zext(i32 %i) {
; CHECK-LABEL: @caller.sext_to_zext(
; CHECK-NEXT: [[CMP:%.*]] = icmp sle i32 [[I:%.*]], 9
; CHECK-NEXT: [[CONV:%.*]] = zext i1 [[CMP]] to i32
; CHECK-NEXT: [[T:%.*]] = call i64 @f.sext_to_zext(i32 [[CONV]])
; CHECK-NEXT: ret i64 [[T]]
;
%cmp = icmp sle i32 %i, 9
%conv = zext i1 %cmp to i32
%t = call i64 @f.sext_to_zext(i32 %conv)
ret i64 %t
}
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