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| author | Chris Lattner <sabre@nondot.org> | 2010-11-18 06:41:51 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-11-18 06:41:51 +0000 |
| commit | 6248065194778c866164b0c10f09f0f0d91b91ac (patch) | |
| tree | eec283653b335667e90bc163995d1d3b7339829f /test | |
| parent | a9be1df6d7a9b5a07253d83a634ae5876e7e5550 (diff) | |
| download | external_llvm-6248065194778c866164b0c10f09f0f0d91b91ac.zip external_llvm-6248065194778c866164b0c10f09f0f0d91b91ac.tar.gz external_llvm-6248065194778c866164b0c10f09f0f0d91b91ac.tar.bz2 | |
allow eliminating an alloca that is just copied from an constant global
if it is passed as a byval argument. The byval argument will just be a
read, so it is safe to read from the original global instead. This allows
us to promote away the %agg.tmp alloca in PR8582
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119686 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/ScalarRepl/memcpy-from-global.ll | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/test/Transforms/ScalarRepl/memcpy-from-global.ll b/test/Transforms/ScalarRepl/memcpy-from-global.ll index 68fc2a2..5b25864 100644 --- a/test/Transforms/ScalarRepl/memcpy-from-global.ll +++ b/test/Transforms/ScalarRepl/memcpy-from-global.ll @@ -81,3 +81,16 @@ define void @test3() { ; CHECK-NEXT: call void @bar(i8* %a) ret void } + +define void @test4() { + %A = alloca %T + %a = bitcast %T* %A to i8* + call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* bitcast (%T* @G to i8*), i64 124, i32 4, i1 false) + call void @baz(i8* byval %a) +; CHECK: @test4 +; CHECK-NEXT: %a = bitcast %T* @G to i8* +; CHECK-NEXT: call void @baz(i8* byval %a) + ret void +} + +declare void @baz(i8* byval) |