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[ConstraintElim] Drop bail out for scalable vectors after using getTrue

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ConstantInt::getTrue/getFalse can materialize scalable vectors with all
lanes true/false.
This commit is contained in:
Florian Hahn
2022-11-03 19:05:45 +00:00
parent b36d678b8e
commit 8086b0c8a8
2 changed files with 2 additions and 8 deletions
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6
llvm/lib/Transforms/Scalar/ConstraintElimination.cpp
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@@ -749,12 +749,6 @@ void State::addInfoFor(BasicBlock &BB) {
static bool checkAndReplaceCondition(CmpInst *Cmp, ConstraintInfo &Info) {
LLVM_DEBUG(dbgs() << "Checking " << *Cmp << "\n");
// TODO: Implement splat of boolean value for scalable vectors.
if (isa<ScalableVectorType>(Cmp->getType())) {
LLVM_DEBUG(dbgs() << " skipping due to scalable vectors\n");
return false;
}
CmpInst::Predicate Pred = Cmp->getPredicate();
Value *A = Cmp->getOperand(0);
Value *B = Cmp->getOperand(1);

4
llvm/test/Transforms/ConstraintElimination/geps-ptrvector.ll
View File

@@ -40,7 +40,7 @@ define <vscale x 2 x i1> @test.scalable.vectorgep.ult.true(<vscale x 2 x ptr> %v
; CHECK-LABEL: @test.scalable.vectorgep.ult.true(
; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr inbounds i32, <vscale x 2 x ptr> [[VEC:%.*]], i64 1
; CHECK-NEXT: [[T_1:%.*]] = icmp ult <vscale x 2 x ptr> [[VEC]], [[GEP_1]]
; CHECK-NEXT: ret <vscale x 2 x i1> [[T_1]]
; CHECK-NEXT: ret <vscale x 2 x i1> shufflevector (<vscale x 2 x i1> insertelement (<vscale x 2 x i1> poison, i1 true, i32 0), <vscale x 2 x i1> poison, <vscale x 2 x i32> zeroinitializer)
;
%gep.1 = getelementptr inbounds i32, <vscale x 2 x ptr> %vec, i64 1
%t.1 = icmp ult <vscale x 2 x ptr> %vec, %gep.1
@@ -51,7 +51,7 @@ define <vscale x 2 x i1> @test.scalable.vectorgep.ult.false(<vscale x 2 x ptr> %
; CHECK-LABEL: @test.scalable.vectorgep.ult.false(
; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr inbounds i32, <vscale x 2 x ptr> [[VEC:%.*]], i64 1
; CHECK-NEXT: [[T_1:%.*]] = icmp ult <vscale x 2 x ptr> [[GEP_1]], [[VEC]]
; CHECK-NEXT: ret <vscale x 2 x i1> [[T_1]]
; CHECK-NEXT: ret <vscale x 2 x i1> zeroinitializer
;
%gep.1 = getelementptr inbounds i32, <vscale x 2 x ptr> %vec, i64 1
%t.1 = icmp ult <vscale x 2 x ptr> %gep.1, %vec