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a3335b259b
verifyMemoryCongruency() filters out trivially dead MemoryDef(s), as we find them immediately dead, before moving from TOP to a new congruence class. This fixes the same problem for PHI(s) skipping MemoryPhis if all the operands are dead. Differential Revision: https://reviews.llvm.org/D33044 llvm-svn: 303100
30 lines
695 B
LLVM
30 lines
695 B
LLVM
; Skip dead MemoryPhis when performing memory congruency verification
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; in NewGVN.
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; RUN: opt -S -newgvn %s | FileCheck %s
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; REQUIRES: asserts
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; CHECK: define void @tinkywinky() {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 false, label %body, label %end
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; CHECK: body:
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; CHECK-NEXT: store i8 undef, i8* null
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; CHECK-NEXT: br label %end
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; CHECK: end:
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture)
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define void @tinkywinky() {
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entry:
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call void @llvm.lifetime.start.p0i8(i64 4, i8* undef)
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br i1 false, label %body, label %end
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body:
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call void @llvm.lifetime.start.p0i8(i64 4, i8* undef)
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br label %end
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end:
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ret void
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}
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