[PATCH] D153453: [MemCpyOpt] implement single BB stack-move optimization which unify the static unescaped allocas
Nikita Popov via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Aug 15 03:48:31 PDT 2023
nikic added a comment.
Here's a reproducer for the assertion failure:
define i32 @test() {
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
%v = load i32, ptr %dest
ret i32 %v
}
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https://reviews.llvm.org/D153453/new/
https://reviews.llvm.org/D153453
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