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e8970888a4
Sometimes an incidentally created instruction can duplicate a Value used elsewhere. It then often doesn't end up in the leader table. If it's later removed, we attempt to remove it from the leader table and segfault. Instead we should just ignore the removal request, which won't cause any problems. The reverse situation, where the original instruction is replaced by the new one (which you might think could leave the leader table empty) cannot occur, because the incidental instruction will never be found in the first place. llvm-svn: 242199
30 lines
639 B
LLVM
30 lines
639 B
LLVM
; RUN: opt -basicaa -gvn -S %s | FileCheck %s
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%MyStruct = type { i32, i32 }
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define i8 @foo(i64 %in, i8* %arr) {
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%addr = alloca %MyStruct
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%dead = trunc i64 %in to i32
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br i1 undef, label %next, label %tmp
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tmp:
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call void @bar()
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br label %next
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next:
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%addr64 = bitcast %MyStruct* %addr to i64*
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store i64 %in, i64* %addr64
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br label %final
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final:
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%addr32 = getelementptr %MyStruct, %MyStruct* %addr, i32 0, i32 0
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%idx32 = load i32, i32* %addr32
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; CHECK: %resptr = getelementptr i8, i8* %arr, i32 %dead
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%resptr = getelementptr i8, i8* %arr, i32 %idx32
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%res = load i8, i8* %resptr
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ret i8 %res
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}
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declare void @bar()
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