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[CVP] Fix assertion failure on vector with.overflow

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Noticed on D62703. LVI only handles plain integers, not vectors of
integers. This was previously not an issue, because vector support
for with.overflow is only a relatively recent addition.

llvm-svn: 362261
This commit is contained in:
Nikita Popov 2019-05-31 20:42:07 +00:00
parent bfe0c48b1d
commit d1d1320557
2 changed files with 13 additions and 1 deletions
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2
lib/Transforms/Scalar/CorrelatedValuePropagation.cpp
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@ -434,7 +434,7 @@ static bool processCallSite(CallSite CS, LazyValueInfo *LVI) {
unsigned ArgNo = 0;
if (auto *WO = dyn_cast<WithOverflowInst>(CS.getInstruction())) {
if (willNotOverflow(WO, LVI)) {
if (WO->getLHS()->getType()->isIntegerTy() && willNotOverflow(WO, LVI)) {
processOverflowIntrinsic(WO);
return true;
}

12
test/Transforms/CorrelatedValuePropagation/overflows.ll
View File

@ -21,6 +21,8 @@ declare { i32, i1 } @llvm.umul.with.overflow.i32(i32, i32)
declare { i8, i1 } @llvm.umul.with.overflow.i8(i8, i8)
declare { <2 x i32>, <2 x i1> } @llvm.uadd.with.overflow.v2i32(<2 x i32>, <2 x i32>)
declare i8 @llvm.uadd.sat.i8(i8, i8)
declare i8 @llvm.sadd.sat.i8(i8, i8)
declare i8 @llvm.usub.sat.i8(i8, i8)
@ -731,6 +733,16 @@ define { i8, i1 } @signed_mul_constant_folding() {
ret { i8, i1 } %mul
}
define { <2 x i32>, <2 x i1> } @uaddo_vec(<2 x i32> %a) {
; CHECK-LABEL: @uaddo_vec(
; CHECK-NEXT: [[ADD:%.*]] = call { <2 x i32>, <2 x i1> } @llvm.uadd.with.overflow.v2i32(<2 x i32> [[A:%.*]], <2 x i32> <i32 1, i32 1>)
; CHECK-NEXT: ret { <2 x i32>, <2 x i1> } [[ADD]]
;
%add = call { <2 x i32>, <2 x i1> } @llvm.uadd.with.overflow.v2i32(<2 x i32> %a, <2 x i32> <i32 1, i32 1>)
ret { <2 x i32>, <2 x i1> } %add
}
define i8 @uadd_sat_no_overflow(i8 %x) {
; CHECK-LABEL: @uadd_sat_no_overflow(
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i8 [[X:%.*]], 100