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[InstCombine][SVE] Skip scalable type for InstCombiner::getFlippedStrictnessPredicateAndConstant.

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We cannot iterate on scalable vector, the number of elements is unknown at compile-time.

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D87918
This commit is contained in:
Huihui Zhang 2020-09-18 11:26:28 -07:00
parent 4972772ef0
commit 3c26b4961e
2 changed files with 13 additions and 2 deletions
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4
lib/Transforms/InstCombine/InstCombineCompares.cpp
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@ -5260,8 +5260,8 @@ InstCombiner::getFlippedStrictnessPredicateAndConstant(CmpInst::Predicate Pred,
// Bail out if the constant can't be safely incremented/decremented.
if (!ConstantIsOk(CI))
return llvm::None;
} else if (auto *VTy = dyn_cast<VectorType>(Type)) {
unsigned NumElts = cast<FixedVectorType>(VTy)->getNumElements();
} else if (auto *FVTy = dyn_cast<FixedVectorType>(Type)) {
unsigned NumElts = FVTy->getNumElements();
for (unsigned i = 0; i != NumElts; ++i) {
Constant *Elt = C->getAggregateElement(i);
if (!Elt)

11
test/Transforms/InstCombine/vscale_cmp.ll Normal file
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@ -0,0 +1,11 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
define <vscale x 2 x i1> @sge(<vscale x 2 x i8> %x) {
; CHECK-LABEL: @sge(
; CHECK-NEXT: [[CMP:%.*]] = icmp sge <vscale x 2 x i8> [[X:%.*]], zeroinitializer
; CHECK-NEXT: ret <vscale x 2 x i1> [[CMP]]
;
%cmp = icmp sge <vscale x 2 x i8> %x, zeroinitializer
ret <vscale x 2 x i1> %cmp
}