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| author | Eli Friedman <eli.friedman@gmail.com> | 2009-12-17 21:07:31 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2009-12-17 21:07:31 +0000 |
| commit | 5842c9968a861f23f67ea472a50d409e97824390 (patch) | |
| tree | 78fa9823f3d4c1018e8a89a8c67b47b8f36feb45 /llvm/test/Transforms/InstCombine/memcpy.ll | |
| parent | 5908f1e27b6cd3c132d1e797889e3c8a279324ed (diff) | |
| download | bcm5719-llvm-5842c9968a861f23f67ea472a50d409e97824390.tar.gz bcm5719-llvm-5842c9968a861f23f67ea472a50d409e97824390.zip | |
Slightly generalize transformation of memmove(a,a,n) so that it also applies
to memcpy. (Such a memcpy is technically illegal, but in practice is safe
and is generated by struct self-assignment in C code.)
llvm-svn: 91621
Diffstat (limited to 'llvm/test/Transforms/InstCombine/memcpy.ll')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/memcpy.ll | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/memcpy.ll b/llvm/test/Transforms/InstCombine/memcpy.ll new file mode 100644 index 00000000000..2e7b2c0bb41 --- /dev/null +++ b/llvm/test/Transforms/InstCombine/memcpy.ll @@ -0,0 +1,10 @@ +; RUN: opt < %s -instcombine -S | FileCheck %s + +declare void @llvm.memcpy.i32(i8*, i8*, i32, i32) + +define void @test4(i8* %a) { + tail call void @llvm.memcpy.i32( i8* %a, i8* %a, i32 100, i32 1 ) + ret void +} +; CHECK: define void @test4 +; CHECK-NEXT: ret void |
