shylie/llvm-project
1
0
Fork 0
Code Issues Pull Requests Actions 6 Packages Projects Releases Wiki Activity
llvm-project/llvm/test/Transforms/InstCombine/with_overflow.ll
Nikita Popov f094d65bea [InstSimplify] Fix addo/subo with undef (PR43188) 
We can't fold the first result to undef, because not all values
may be reachable under the constraint that no overflow occurred.
Use the same folds we do for saturated math instead.

Proofs:
uaddo: https://alive2.llvm.org/ce/z/zf55N_
saddo: https://alive2.llvm.org/ce/z/a_xPgS
usubo: https://alive2.llvm.org/ce/z/DmRqwt
ssubo: https://alive2.llvm.org/ce/z/8ag7U-
2021-01-03 18:51:49 +01:00

759 lines
30 KiB
LLVM
Raw Blame History

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -instcombine -S < %s | FileCheck %s
declare { i8, i1 } @llvm.uadd.with.overflow.i8(i8, i8) nounwind readnone
declare { i8, i1 } @llvm.sadd.with.overflow.i8(i8, i8) nounwind readnone
declare { i8, i1 } @llvm.usub.with.overflow.i8(i8, i8) nounwind readnone
declare { i8, i1 } @llvm.ssub.with.overflow.i8(i8, i8) nounwind readnone
declare { i8, i1 } @llvm.umul.with.overflow.i8(i8, i8) nounwind readnone
declare { i8, i1 } @llvm.smul.with.overflow.i8(i8, i8) nounwind readnone
declare { i32, i1 } @llvm.sadd.with.overflow.i32(i32, i32) nounwind readnone
declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32) nounwind readnone
declare { i32, i1 } @llvm.ssub.with.overflow.i32(i32, i32) nounwind readnone
declare { i32, i1 } @llvm.usub.with.overflow.i32(i32, i32) nounwind readnone
declare { i32, i1 } @llvm.smul.with.overflow.i32(i32, i32) nounwind readnone
declare { i32, i1 } @llvm.umul.with.overflow.i32(i32, i32) nounwind readnone
define i8 @uaddtest1(i8 %A, i8 %B) {
; CHECK-LABEL: @uaddtest1(
; CHECK-NEXT: [[Y:%.*]] = add i8 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: ret i8 [[Y]]
;
%x = call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %A, i8 %B)
%y = extractvalue { i8, i1 } %x, 0
ret i8 %y
}
define i8 @uaddtest2(i8 %A, i8 %B, i1* %overflowPtr) {
; CHECK-LABEL: @uaddtest2(
; CHECK-NEXT: [[AND_A:%.*]] = and i8 [[A:%.*]], 127
; CHECK-NEXT: [[AND_B:%.*]] = and i8 [[B:%.*]], 127
; CHECK-NEXT: [[X:%.*]] = add nuw i8 [[AND_A]], [[AND_B]]
; CHECK-NEXT: store i1 false, i1* [[OVERFLOWPTR:%.*]], align 1
; CHECK-NEXT: ret i8 [[X]]
;
%and.A = and i8 %A, 127
%and.B = and i8 %B, 127
%x = call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %and.A, i8 %and.B)
%y = extractvalue { i8, i1 } %x, 0
%z = extractvalue { i8, i1 } %x, 1
store i1 %z, i1* %overflowPtr
ret i8 %y
}
define i8 @uaddtest3(i8 %A, i8 %B, i1* %overflowPtr) {
; CHECK-LABEL: @uaddtest3(
; CHECK-NEXT: [[OR_A:%.*]] = or i8 [[A:%.*]], -128
; CHECK-NEXT: [[OR_B:%.*]] = or i8 [[B:%.*]], -128
; CHECK-NEXT: [[X:%.*]] = add i8 [[OR_A]], [[OR_B]]
; CHECK-NEXT: store i1 true, i1* [[OVERFLOWPTR:%.*]], align 1
; CHECK-NEXT: ret i8 [[X]]
;
%or.A = or i8 %A, -128
%or.B = or i8 %B, -128
%x = call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %or.A, i8 %or.B)
%y = extractvalue { i8, i1 } %x, 0
%z = extractvalue { i8, i1 } %x, 1
store i1 %z, i1* %overflowPtr
ret i8 %y
}
define i8 @uaddtest4(i8 %A, i1* %overflowPtr) {
; CHECK-LABEL: @uaddtest4(
; CHECK-NEXT: store i1 false, i1* [[OVERFLOWPTR:%.*]], align 1
; CHECK-NEXT: ret i8 -1
;
%x = call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 undef, i8 %A)
%y = extractvalue { i8, i1 } %x, 0
%z = extractvalue { i8, i1 } %x, 1
store i1 %z, i1* %overflowPtr
ret i8 %y
}
define i8 @uaddtest5(i8 %A, i1* %overflowPtr) {
; CHECK-LABEL: @uaddtest5(
; CHECK-NEXT: store i1 false, i1* [[OVERFLOWPTR:%.*]], align 1
; CHECK-NEXT: ret i8 [[A:%.*]]
;
%x = call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 0, i8 %A)
%y = extractvalue { i8, i1 } %x, 0
%z = extractvalue { i8, i1 } %x, 1
store i1 %z, i1* %overflowPtr
ret i8 %y
}
define i1 @uaddtest6(i8 %A, i8 %B) {
; CHECK-LABEL: @uaddtest6(
; CHECK-NEXT: [[Z:%.*]] = icmp ugt i8 [[A:%.*]], 3
; CHECK-NEXT: ret i1 [[Z]]
;
%x = call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %A, i8 -4)
%z = extractvalue { i8, i1 } %x, 1
ret i1 %z
}
define i8 @uaddtest7(i8 %A, i8 %B) {
; CHECK-LABEL: @uaddtest7(
; CHECK-NEXT: [[Z:%.*]] = add i8 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: ret i8 [[Z]]
;
%x = call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %A, i8 %B)
%z = extractvalue { i8, i1 } %x, 0
ret i8 %z
}
; PR20194
define { i32, i1 } @saddtest_nsw(i8 %a, i8 %b) {
; CHECK-LABEL: @saddtest_nsw(
; CHECK-NEXT: [[AA:%.*]] = sext i8 [[A:%.*]] to i32
; CHECK-NEXT: [[BB:%.*]] = sext i8 [[B:%.*]] to i32
; CHECK-NEXT: [[X:%.*]] = add nsw i32 [[AA]], [[BB]]
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i32, i1 } { i32 undef, i1 false }, i32 [[X]], 0
; CHECK-NEXT: ret { i32, i1 } [[TMP1]]
;
%aa = sext i8 %a to i32
%bb = sext i8 %b to i32
%x = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %aa, i32 %bb)
ret { i32, i1 } %x
}
define { i32, i1 } @uaddtest_nuw(i32 %a, i32 %b) {
; CHECK-LABEL: @uaddtest_nuw(
; CHECK-NEXT: [[AA:%.*]] = and i32 [[A:%.*]], 2147483647
; CHECK-NEXT: [[BB:%.*]] = and i32 [[B:%.*]], 2147483647
; CHECK-NEXT: [[X:%.*]] = add nuw i32 [[AA]], [[BB]]
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i32, i1 } { i32 undef, i1 false }, i32 [[X]], 0
; CHECK-NEXT: ret { i32, i1 } [[TMP1]]
;
%aa = and i32 %a, 2147483647
%bb = and i32 %b, 2147483647
%x = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %aa, i32 %bb)
ret { i32, i1 } %x
}
define { i32, i1 } @ssubtest_nsw(i8 %a, i8 %b) {
; CHECK-LABEL: @ssubtest_nsw(
; CHECK-NEXT: [[AA:%.*]] = sext i8 [[A:%.*]] to i32
; CHECK-NEXT: [[BB:%.*]] = sext i8 [[B:%.*]] to i32
; CHECK-NEXT: [[X:%.*]] = sub nsw i32 [[AA]], [[BB]]
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i32, i1 } { i32 undef, i1 false }, i32 [[X]], 0
; CHECK-NEXT: ret { i32, i1 } [[TMP1]]
;
%aa = sext i8 %a to i32
%bb = sext i8 %b to i32
%x = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %aa, i32 %bb)
ret { i32, i1 } %x
}
define { i32, i1 } @usubtest_nuw(i32 %a, i32 %b) {
; CHECK-LABEL: @usubtest_nuw(
; CHECK-NEXT: [[AA:%.*]] = or i32 [[A:%.*]], -2147483648
; CHECK-NEXT: [[BB:%.*]] = and i32 [[B:%.*]], 2147483647
; CHECK-NEXT: [[X:%.*]] = sub nuw i32 [[AA]], [[BB]]
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i32, i1 } { i32 undef, i1 false }, i32 [[X]], 0
; CHECK-NEXT: ret { i32, i1 } [[TMP1]]
;
%aa = or i32 %a, 2147483648
%bb = and i32 %b, 2147483647
%x = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %aa, i32 %bb)
ret { i32, i1 } %x
}
define { i32, i1 } @smultest1_nsw(i32 %a, i32 %b) {
; CHECK-LABEL: @smultest1_nsw(
; CHECK-NEXT: [[AA:%.*]] = and i32 [[A:%.*]], 4095
; CHECK-NEXT: [[BB:%.*]] = and i32 [[B:%.*]], 524287
; CHECK-NEXT: [[X:%.*]] = mul nuw nsw i32 [[AA]], [[BB]]
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i32, i1 } { i32 undef, i1 false }, i32 [[X]], 0
; CHECK-NEXT: ret { i32, i1 } [[TMP1]]
;
%aa = and i32 %a, 4095 ; 0xfff
%bb = and i32 %b, 524287; 0x7ffff
%x = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 %aa, i32 %bb)
ret { i32, i1 } %x
}
define { i32, i1 } @smultest2_nsw(i32 %a, i32 %b) {
; CHECK-LABEL: @smultest2_nsw(
; CHECK-NEXT: [[AA:%.*]] = ashr i32 [[A:%.*]], 16
; CHECK-NEXT: [[BB:%.*]] = ashr i32 [[B:%.*]], 16
; CHECK-NEXT: [[X:%.*]] = mul nsw i32 [[AA]], [[BB]]
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i32, i1 } { i32 undef, i1 false }, i32 [[X]], 0
; CHECK-NEXT: ret { i32, i1 } [[TMP1]]
;
%aa = ashr i32 %a, 16
%bb = ashr i32 %b, 16
%x = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 %aa, i32 %bb)
ret { i32, i1 } %x
}
define { i32, i1 } @smultest3_sw(i32 %a, i32 %b) {
; CHECK-LABEL: @smultest3_sw(
; CHECK-NEXT: [[AA:%.*]] = ashr i32 [[A:%.*]], 16
; CHECK-NEXT: [[BB:%.*]] = ashr i32 [[B:%.*]], 15
; CHECK-NEXT: [[X:%.*]] = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 [[AA]], i32 [[BB]])
; CHECK-NEXT: ret { i32, i1 } [[X]]
;
%aa = ashr i32 %a, 16
%bb = ashr i32 %b, 15
%x = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 %aa, i32 %bb)
ret { i32, i1 } %x
}
define { i32, i1 } @umultest_nuw(i32 %a, i32 %b) {
; CHECK-LABEL: @umultest_nuw(
; CHECK-NEXT: [[AA:%.*]] = and i32 [[A:%.*]], 65535
; CHECK-NEXT: [[BB:%.*]] = and i32 [[B:%.*]], 65535
; CHECK-NEXT: [[X:%.*]] = mul nuw i32 [[AA]], [[BB]]
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i32, i1 } { i32 undef, i1 false }, i32 [[X]], 0
; CHECK-NEXT: ret { i32, i1 } [[TMP1]]
;
%aa = and i32 %a, 65535 ; 0xffff
%bb = and i32 %b, 65535 ; 0xffff
%x = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 %aa, i32 %bb)
ret { i32, i1 } %x
}
define i8 @umultest1(i8 %A, i1* %overflowPtr) {
; CHECK-LABEL: @umultest1(
; CHECK-NEXT: store i1 false, i1* [[OVERFLOWPTR:%.*]], align 1
; CHECK-NEXT: ret i8 0
;
%x = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 0, i8 %A)
%y = extractvalue { i8, i1 } %x, 0
%z = extractvalue { i8, i1 } %x, 1
store i1 %z, i1* %overflowPtr
ret i8 %y
}
define i8 @umultest2(i8 %A, i1* %overflowPtr) {
; CHECK-LABEL: @umultest2(
; CHECK-NEXT: store i1 false, i1* [[OVERFLOWPTR:%.*]], align 1
; CHECK-NEXT: ret i8 [[A:%.*]]
;
%x = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 1, i8 %A)
%y = extractvalue { i8, i1 } %x, 0
%z = extractvalue { i8, i1 } %x, 1
store i1 %z, i1* %overflowPtr
ret i8 %y
}
define i32 @umultest3(i32 %n) nounwind {
; CHECK-LABEL: @umultest3(
; CHECK-NEXT: [[SHR:%.*]] = lshr i32 [[N:%.*]], 2
; CHECK-NEXT: [[MUL:%.*]] = mul nuw i32 [[SHR]], 3
; CHECK-NEXT: ret i32 [[MUL]]
;
%shr = lshr i32 %n, 2
%mul = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 %shr, i32 3)
%ov = extractvalue { i32, i1 } %mul, 1
%res = extractvalue { i32, i1 } %mul, 0
%ret = select i1 %ov, i32 -1, i32 %res
ret i32 %ret
}
define i32 @umultest4(i32 %n) nounwind {
; CHECK-LABEL: @umultest4(
; CHECK-NEXT: [[SHR:%.*]] = lshr i32 [[N:%.*]], 1
; CHECK-NEXT: [[MUL:%.*]] = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 [[SHR]], i32 4)
; CHECK-NEXT: [[OV:%.*]] = extractvalue { i32, i1 } [[MUL]], 1
; CHECK-NEXT: [[RES:%.*]] = extractvalue { i32, i1 } [[MUL]], 0
; CHECK-NEXT: [[RET:%.*]] = select i1 [[OV]], i32 -1, i32 [[RES]]
; CHECK-NEXT: ret i32 [[RET]]
;
%shr = lshr i32 %n, 1
%mul = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 %shr, i32 4)
%ov = extractvalue { i32, i1 } %mul, 1
%res = extractvalue { i32, i1 } %mul, 0
%ret = select i1 %ov, i32 -1, i32 %res
ret i32 %ret
}
define { i32, i1 } @umultest5(i32 %x, i32 %y) nounwind {
; CHECK-LABEL: @umultest5(
; CHECK-NEXT: [[OR_X:%.*]] = or i32 [[X:%.*]], -2147483648
; CHECK-NEXT: [[OR_Y:%.*]] = or i32 [[Y:%.*]], -2147483648
; CHECK-NEXT: [[MUL:%.*]] = mul i32 [[OR_X]], [[OR_Y]]
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i32, i1 } { i32 undef, i1 true }, i32 [[MUL]], 0
; CHECK-NEXT: ret { i32, i1 } [[TMP1]]
;
%or_x = or i32 %x, 2147483648
%or_y = or i32 %y, 2147483648
%mul = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 %or_x, i32 %or_y)
ret { i32, i1 } %mul
}
define i1 @overflow_div_add(i32 %v1, i32 %v2) nounwind {
; CHECK-LABEL: @overflow_div_add(
; CHECK-NEXT: ret i1 false
;
%div = sdiv i32 %v1, 2
%t = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %div, i32 1)
%obit = extractvalue { i32, i1 } %t, 1
ret i1 %obit
}
define i1 @overflow_div_sub(i32 %v1, i32 %v2) nounwind {
; Check cases where the known sign bits are larger than the word size.
; CHECK-LABEL: @overflow_div_sub(
; CHECK-NEXT: ret i1 false
;
%a = ashr i32 %v1, 18
%div = sdiv i32 %a, 65536
%t = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %div, i32 1)
%obit = extractvalue { i32, i1 } %t, 1
ret i1 %obit
}
define i1 @overflow_mod_mul(i32 %v1, i32 %v2) nounwind {
; CHECK-LABEL: @overflow_mod_mul(
; CHECK-NEXT: ret i1 false
;
%rem = srem i32 %v1, 1000
%t = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 %rem, i32 %rem)
%obit = extractvalue { i32, i1 } %t, 1
ret i1 %obit
}
define i1 @overflow_mod_overflow_mul(i32 %v1, i32 %v2) nounwind {
; CHECK-LABEL: @overflow_mod_overflow_mul(
; CHECK-NEXT: [[REM:%.*]] = srem i32 [[V1:%.*]], 65537
; CHECK-NEXT: [[T:%.*]] = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 [[REM]], i32 [[REM]])
; CHECK-NEXT: [[OBIT:%.*]] = extractvalue { i32, i1 } [[T]], 1
; CHECK-NEXT: ret i1 [[OBIT]]
;
%rem = srem i32 %v1, 65537
; This may overflow because the result of the mul operands may be greater than 16bits
; and the result greater than 32.
%t = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 %rem, i32 %rem)
%obit = extractvalue { i32, i1 } %t, 1
ret i1 %obit
}
define { i32, i1 } @ssubtest_reorder(i8 %a) {
; CHECK-LABEL: @ssubtest_reorder(
; CHECK-NEXT: [[AA:%.*]] = sext i8 [[A:%.*]] to i32
; CHECK-NEXT: [[X:%.*]] = sub nsw i32 0, [[AA]]
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i32, i1 } { i32 undef, i1 false }, i32 [[X]], 0
; CHECK-NEXT: ret { i32, i1 } [[TMP1]]
;
%aa = sext i8 %a to i32
%x = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 0, i32 %aa)
ret { i32, i1 } %x
}
define { i32, i1 } @never_overflows_ssub_test0(i32 %a) {
; CHECK-LABEL: @never_overflows_ssub_test0(
; CHECK-NEXT: [[X:%.*]] = insertvalue { i32, i1 } { i32 undef, i1 false }, i32 [[A:%.*]], 0
; CHECK-NEXT: ret { i32, i1 } [[X]]
;
%x = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %a, i32 0)
ret { i32, i1 } %x
}
define i1 @uadd_res_ult_x(i32 %x, i32 %y, i1* %p) nounwind {
; CHECK-LABEL: @uadd_res_ult_x(
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[X:%.*]], i32 [[Y:%.*]])
; CHECK-NEXT: [[B:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: store i1 [[B]], i1* [[P:%.*]], align 1
; CHECK-NEXT: [[D:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: ret i1 [[D]]
;
%a = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %x, i32 %y)
%b = extractvalue { i32, i1 } %a, 1
store i1 %b, i1* %p
%c = extractvalue { i32, i1 } %a, 0
%d = icmp ult i32 %c, %x
ret i1 %d
}
define i1 @uadd_res_ult_y(i32 %x, i32 %y, i1* %p) nounwind {
; CHECK-LABEL: @uadd_res_ult_y(
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[X:%.*]], i32 [[Y:%.*]])
; CHECK-NEXT: [[B:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: store i1 [[B]], i1* [[P:%.*]], align 1
; CHECK-NEXT: [[D:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: ret i1 [[D]]
;
%a = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %x, i32 %y)
%b = extractvalue { i32, i1 } %a, 1
store i1 %b, i1* %p
%c = extractvalue { i32, i1 } %a, 0
%d = icmp ult i32 %c, %y
ret i1 %d
}
define i1 @uadd_res_ugt_x(i32 %xx, i32 %y, i1* %p) nounwind {
; CHECK-LABEL: @uadd_res_ugt_x(
; CHECK-NEXT: [[X:%.*]] = urem i32 42, [[XX:%.*]]
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[X]], i32 [[Y:%.*]])
; CHECK-NEXT: [[B:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: store i1 [[B]], i1* [[P:%.*]], align 1
; CHECK-NEXT: [[D:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: ret i1 [[D]]
;
%x = urem i32 42, %xx ; Thwart complexity-based canonicalization
%a = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %x, i32 %y)
%b = extractvalue { i32, i1 } %a, 1
store i1 %b, i1* %p
%c = extractvalue { i32, i1 } %a, 0
%d = icmp ugt i32 %x, %c
ret i1 %d
}
define i1 @uadd_res_ugt_y(i32 %x, i32 %yy, i1* %p) nounwind {
; CHECK-LABEL: @uadd_res_ugt_y(
; CHECK-NEXT: [[Y:%.*]] = urem i32 42, [[YY:%.*]]
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[X:%.*]], i32 [[Y]])
; CHECK-NEXT: [[B:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: store i1 [[B]], i1* [[P:%.*]], align 1
; CHECK-NEXT: [[D:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: ret i1 [[D]]
;
%y = urem i32 42, %yy ; Thwart complexity-based canonicalization
%a = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %x, i32 %y)
%b = extractvalue { i32, i1 } %a, 1
store i1 %b, i1* %p
%c = extractvalue { i32, i1 } %a, 0
%d = icmp ugt i32 %y, %c
ret i1 %d
}
define i1 @uadd_res_ult_const(i32 %x, i1* %p) nounwind {
; CHECK-LABEL: @uadd_res_ult_const(
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[X:%.*]], i32 42)
; CHECK-NEXT: [[B:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: store i1 [[B]], i1* [[P:%.*]], align 1
; CHECK-NEXT: [[D:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: ret i1 [[D]]
;
%a = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %x, i32 42)
%b = extractvalue { i32, i1 } %a, 1
store i1 %b, i1* %p
%c = extractvalue { i32, i1 } %a, 0
%d = icmp ult i32 %c, 42
ret i1 %d
}
define i1 @uadd_res_ult_const_one(i32 %x, i1* %p) nounwind {
; CHECK-LABEL: @uadd_res_ult_const_one(
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[X:%.*]], i32 1)
; CHECK-NEXT: [[B:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: store i1 [[B]], i1* [[P:%.*]], align 1
; CHECK-NEXT: [[D:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: ret i1 [[D]]
;
%a = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %x, i32 1)
%b = extractvalue { i32, i1 } %a, 1
store i1 %b, i1* %p
%c = extractvalue { i32, i1 } %a, 0
%d = icmp ult i32 %c, 1
ret i1 %d
}
define i1 @uadd_res_ult_const_minus_one(i32 %x, i1* %p) nounwind {
; CHECK-LABEL: @uadd_res_ult_const_minus_one(
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[X:%.*]], i32 -1)
; CHECK-NEXT: [[B:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: store i1 [[B]], i1* [[P:%.*]], align 1
; CHECK-NEXT: [[D:%.*]] = extractvalue { i32, i1 } [[A]], 1
; CHECK-NEXT: ret i1 [[D]]
;
%a = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %x, i32 -1)
%b = extractvalue { i32, i1 } %a, 1
store i1 %b, i1* %p
%c = extractvalue { i32, i1 } %a, 0
%d = icmp ult i32 %c, -1
ret i1 %d
}
define { i32, i1 } @sadd_canonicalize_constant_arg0(i32 %x) nounwind {
; CHECK-LABEL: @sadd_canonicalize_constant_arg0(
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[X:%.*]], i32 42)
; CHECK-NEXT: ret { i32, i1 } [[A]]
;
%a = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 42, i32 %x)
ret { i32, i1 } %a
}
define { i32, i1 } @uadd_canonicalize_constant_arg0(i32 %x) nounwind {
; CHECK-LABEL: @uadd_canonicalize_constant_arg0(
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[X:%.*]], i32 42)
; CHECK-NEXT: ret { i32, i1 } [[A]]
;
%a = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 42, i32 %x)
ret { i32, i1 } %a
}
define { i32, i1 } @ssub_no_canonicalize_constant_arg0(i32 %x) nounwind {
; CHECK-LABEL: @ssub_no_canonicalize_constant_arg0(
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 42, i32 [[X:%.*]])
; CHECK-NEXT: ret { i32, i1 } [[A]]
;
%a = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 42, i32 %x)
ret { i32, i1 } %a
}
define { i32, i1 } @usub_no_canonicalize_constant_arg0(i32 %x) nounwind {
; CHECK-LABEL: @usub_no_canonicalize_constant_arg0(
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 42, i32 [[X:%.*]])
; CHECK-NEXT: ret { i32, i1 } [[A]]
;
%a = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 42, i32 %x)
ret { i32, i1 } %a
}
define { i32, i1 } @smul_canonicalize_constant_arg0(i32 %x) nounwind {
; CHECK-LABEL: @smul_canonicalize_constant_arg0(
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 [[X:%.*]], i32 42)
; CHECK-NEXT: ret { i32, i1 } [[A]]
;
%a = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 42, i32 %x)
ret { i32, i1 } %a
}
define { i32, i1 } @umul_canonicalize_constant_arg0(i32 %x) nounwind {
; CHECK-LABEL: @umul_canonicalize_constant_arg0(
; CHECK-NEXT: [[A:%.*]] = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 [[X:%.*]], i32 42)
; CHECK-NEXT: ret { i32, i1 } [[A]]
;
%a = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 42, i32 %x)
ret { i32, i1 } %a
}
; Always overflow tests
define { i8, i1 } @uadd_always_overflow(i8 %x) nounwind {
; CHECK-LABEL: @uadd_always_overflow(
; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[X:%.*]], 63
; CHECK-NEXT: [[TMP2:%.*]] = insertvalue { i8, i1 } { i8 undef, i1 true }, i8 [[TMP1]], 0
; CHECK-NEXT: ret { i8, i1 } [[TMP2]]
;
%y = or i8 %x, 192
%a = call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %y, i8 64)
ret { i8, i1 } %a
}
define { i8, i1 } @usub_always_overflow(i8 %x) nounwind {
; CHECK-LABEL: @usub_always_overflow(
; CHECK-NEXT: [[Y:%.*]] = or i8 [[X:%.*]], 64
; CHECK-NEXT: [[A:%.*]] = sub nsw i8 63, [[Y]]
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i8, i1 } { i8 undef, i1 true }, i8 [[A]], 0
; CHECK-NEXT: ret { i8, i1 } [[TMP1]]
;
%y = or i8 %x, 64
%a = call { i8, i1 } @llvm.usub.with.overflow.i8(i8 63, i8 %y)
ret { i8, i1 } %a
}
define { i8, i1 } @umul_always_overflow(i8 %x) nounwind {
; CHECK-LABEL: @umul_always_overflow(
; CHECK-NEXT: [[A:%.*]] = shl i8 [[X:%.*]], 1
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i8, i1 } { i8 undef, i1 true }, i8 [[A]], 0
; CHECK-NEXT: ret { i8, i1 } [[TMP1]]
;
%y = or i8 %x, 128
%a = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 %y, i8 2)
ret { i8, i1 } %a
}
define { i8, i1 } @sadd_always_overflow(i8 %x) nounwind {
; CHECK-LABEL: @sadd_always_overflow(
; CHECK-NEXT: [[C:%.*]] = icmp sgt i8 [[X:%.*]], 100
; CHECK-NEXT: [[Y:%.*]] = select i1 [[C]], i8 [[X]], i8 100
; CHECK-NEXT: [[A:%.*]] = add nuw i8 [[Y]], 28
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i8, i1 } { i8 undef, i1 true }, i8 [[A]], 0
; CHECK-NEXT: ret { i8, i1 } [[TMP1]]
;
%c = icmp sgt i8 %x, 100
%y = select i1 %c, i8 %x, i8 100
%a = call { i8, i1 } @llvm.sadd.with.overflow.i8(i8 %y, i8 28)
ret { i8, i1 } %a
}
define { i8, i1 } @ssub_always_overflow(i8 %x) nounwind {
; CHECK-LABEL: @ssub_always_overflow(
; CHECK-NEXT: [[C:%.*]] = icmp sgt i8 [[X:%.*]], 29
; CHECK-NEXT: [[Y:%.*]] = select i1 [[C]], i8 [[X]], i8 29
; CHECK-NEXT: [[A:%.*]] = sub nuw i8 -100, [[Y]]
; CHECK-NEXT: [[TMP1:%.*]] = insertvalue { i8, i1 } { i8 undef, i1 true }, i8 [[A]], 0
; CHECK-NEXT: ret { i8, i1 } [[TMP1]]
;
%c = icmp sgt i8 %x, 29
%y = select i1 %c, i8 %x, i8 29
%a = call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 -100, i8 %y)
ret { i8, i1 } %a
}
define { i8, i1 } @smul_always_overflow(i8 %x) nounwind {
; CHECK-LABEL: @smul_always_overflow(
; CHECK-NEXT: [[C:%.*]] = icmp sgt i8 [[X:%.*]], 100
; CHECK-NEXT: [[Y:%.*]] = select i1 [[C]], i8 [[X]], i8 100
; CHECK-NEXT: [[A:%.*]] = call { i8, i1 } @llvm.smul.with.overflow.i8(i8 [[Y]], i8 2)
; CHECK-NEXT: ret { i8, i1 } [[A]]
;
%c = icmp sgt i8 %x, 100
%y = select i1 %c, i8 %x, i8 100
%a = call { i8, i1 } @llvm.smul.with.overflow.i8(i8 %y, i8 2)
ret { i8, i1 } %a
}
declare { <4 x i8>, <4 x i1> } @llvm.sadd.with.overflow.v4i8(<4 x i8>, <4 x i8>)
declare { <4 x i8>, <4 x i1> } @llvm.uadd.with.overflow.v4i8(<4 x i8>, <4 x i8>)
declare { <4 x i8>, <4 x i1> } @llvm.ssub.with.overflow.v4i8(<4 x i8>, <4 x i8>)
declare { <4 x i8>, <4 x i1> } @llvm.usub.with.overflow.v4i8(<4 x i8>, <4 x i8>)
declare { <4 x i8>, <4 x i1> } @llvm.smul.with.overflow.v4i8(<4 x i8>, <4 x i8>)
declare { <4 x i8>, <4 x i1> } @llvm.umul.with.overflow.v4i8(<4 x i8>, <4 x i8>)
; Always overflow
define { <4 x i8>, <4 x i1> } @always_sadd_const_vector() nounwind {
; CHECK-LABEL: @always_sadd_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 -128, i8 -128, i8 -128, i8 -128>, <4 x i1> <i1 true, i1 true, i1 true, i1 true> }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.sadd.with.overflow.v4i8(<4 x i8> <i8 127, i8 127, i8 127, i8 127>, <4 x i8> <i8 1, i8 1, i8 1, i8 1>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @always_uadd_const_vector() nounwind {
; CHECK-LABEL: @always_uadd_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> zeroinitializer, <4 x i1> <i1 true, i1 true, i1 true, i1 true> }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.uadd.with.overflow.v4i8(<4 x i8> <i8 255, i8 255, i8 255, i8 255>, <4 x i8> <i8 1, i8 1, i8 1, i8 1>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @always_ssub_const_vector() nounwind {
; CHECK-LABEL: @always_ssub_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 127, i8 127, i8 127, i8 127>, <4 x i1> <i1 true, i1 true, i1 true, i1 true> }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.ssub.with.overflow.v4i8(<4 x i8> <i8 -128, i8 -128, i8 -128, i8 -128>, <4 x i8> <i8 1, i8 1, i8 1, i8 1>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @always_usub_const_vector() nounwind {
; CHECK-LABEL: @always_usub_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 -1, i8 -1, i8 -1, i8 -1>, <4 x i1> <i1 true, i1 true, i1 true, i1 true> }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.usub.with.overflow.v4i8(<4 x i8> <i8 0, i8 0, i8 0, i8 0>, <4 x i8> <i8 1, i8 1, i8 1, i8 1>)
ret { <4 x i8>, <4 x i1> } %x
}
; NOTE: LLVM doesn't (yet) detect the multiplication always results in a overflow
define { <4 x i8>, <4 x i1> } @always_smul_const_vector() nounwind {
; CHECK-LABEL: @always_smul_const_vector(
; CHECK-NEXT: [[X:%.*]] = call { <4 x i8>, <4 x i1> } @llvm.smul.with.overflow.v4i8(<4 x i8> <i8 127, i8 127, i8 127, i8 127>, <4 x i8> <i8 3, i8 3, i8 3, i8 3>)
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } [[X]]
;
%x = call { <4 x i8>, <4 x i1> } @llvm.smul.with.overflow.v4i8(<4 x i8> <i8 127, i8 127, i8 127, i8 127>, <4 x i8> <i8 3, i8 3, i8 3, i8 3>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @always_umul_const_vector() nounwind {
; CHECK-LABEL: @always_umul_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 -3, i8 -3, i8 -3, i8 -3>, <4 x i1> <i1 true, i1 true, i1 true, i1 true> }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.umul.with.overflow.v4i8(<4 x i8> <i8 255, i8 255, i8 255, i8 255>, <4 x i8> <i8 3, i8 3, i8 3, i8 3>)
ret { <4 x i8>, <4 x i1> } %x
}
; Never overflow
define { <4 x i8>, <4 x i1> } @never_sadd_const_vector() nounwind {
; CHECK-LABEL: @never_sadd_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 -50, i8 -10, i8 0, i8 60>, <4 x i1> zeroinitializer }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.sadd.with.overflow.v4i8(<4 x i8> <i8 -10, i8 -20, i8 30, i8 40>, <4 x i8> <i8 -40, i8 10, i8 -30, i8 20>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @never_uadd_const_vector() nounwind {
; CHECK-LABEL: @never_uadd_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 32, i8 64, i8 96, i8 48>, <4 x i1> zeroinitializer }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.uadd.with.overflow.v4i8(<4 x i8> <i8 0, i8 32, i8 64, i8 16>, <4 x i8> <i8 32, i8 32, i8 32, i8 32>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @never_ssub_const_vector() nounwind {
; CHECK-LABEL: @never_ssub_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 0, i8 10, i8 20, i8 30>, <4 x i1> zeroinitializer }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.ssub.with.overflow.v4i8(<4 x i8> <i8 -10, i8 -10, i8 -10, i8 -10>, <4 x i8> <i8 -10, i8 -20, i8 -30, i8 -40>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @never_usub_const_vector() nounwind {
; CHECK-LABEL: @never_usub_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 127, i8 -1, i8 0, i8 -2>, <4 x i1> zeroinitializer }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.usub.with.overflow.v4i8(<4 x i8> <i8 255, i8 255, i8 255, i8 255>, <4 x i8> <i8 128, i8 0, i8 255, i8 1>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @never_smul_const_vector() nounwind {
; CHECK-LABEL: @never_smul_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 -54, i8 -18, i8 -60, i8 -90>, <4 x i1> zeroinitializer }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.smul.with.overflow.v4i8(<4 x i8> <i8 -6, i8 -6, i8 -6, i8 -6>, <4 x i8> <i8 9, i8 3, i8 10, i8 15>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @never_umul_const_vector() nounwind {
; CHECK-LABEL: @never_umul_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 -31, i8 120, i8 60, i8 30>, <4 x i1> zeroinitializer }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.umul.with.overflow.v4i8(<4 x i8> <i8 15, i8 15, i8 15, i8 15>, <4 x i8> <i8 15, i8 8, i8 4, i8 2>)
ret { <4 x i8>, <4 x i1> } %x
}
; Neutral value
define { <4 x i8>, <4 x i1> } @neutral_sadd_const_vector() nounwind {
; CHECK-LABEL: @neutral_sadd_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 1, i8 2, i8 3, i8 4>, <4 x i1> zeroinitializer }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.sadd.with.overflow.v4i8(<4 x i8> <i8 1, i8 2, i8 3, i8 4>, <4 x i8> <i8 0, i8 0, i8 0, i8 0>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @neutral_uadd_const_vector() nounwind {
; CHECK-LABEL: @neutral_uadd_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 1, i8 2, i8 3, i8 4>, <4 x i1> zeroinitializer }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.uadd.with.overflow.v4i8(<4 x i8> <i8 1, i8 2, i8 3, i8 4>, <4 x i8> <i8 0, i8 0, i8 0, i8 0>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @neutral_ssub_const_vector() nounwind {
; CHECK-LABEL: @neutral_ssub_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 1, i8 2, i8 3, i8 4>, <4 x i1> zeroinitializer }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.ssub.with.overflow.v4i8(<4 x i8> <i8 1, i8 2, i8 3, i8 4>, <4 x i8> <i8 0, i8 0, i8 0, i8 0>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @neutral_usub_const_vector() nounwind {
; CHECK-LABEL: @neutral_usub_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 1, i8 2, i8 3, i8 4>, <4 x i1> zeroinitializer }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.usub.with.overflow.v4i8(<4 x i8> <i8 1, i8 2, i8 3, i8 4>, <4 x i8> <i8 0, i8 0, i8 0, i8 0>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @neutral_smul_const_vector() nounwind {
; CHECK-LABEL: @neutral_smul_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 1, i8 2, i8 3, i8 4>, <4 x i1> zeroinitializer }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.smul.with.overflow.v4i8(<4 x i8> <i8 1, i8 2, i8 3, i8 4>, <4 x i8> <i8 1, i8 1, i8 1, i8 1>)
ret { <4 x i8>, <4 x i1> } %x
}
define { <4 x i8>, <4 x i1> } @neutral_umul_const_vector() nounwind {
; CHECK-LABEL: @neutral_umul_const_vector(
; CHECK-NEXT: ret { <4 x i8>, <4 x i1> } { <4 x i8> <i8 1, i8 2, i8 3, i8 4>, <4 x i1> zeroinitializer }
;
%x = call { <4 x i8>, <4 x i1> } @llvm.umul.with.overflow.v4i8(<4 x i8> <i8 1, i8 2, i8 3, i8 4>, <4 x i8> <i8 1, i8 1, i8 1, i8 1>)
ret { <4 x i8>, <4 x i1> } %x
}
Reference in New Issue View Git Blame Copy Permalink