diff options
| author | Rafael Espindola <rafael.espindola@gmail.com> | 2007-09-28 12:53:01 +0000 |
|---|---|---|
| committer | Rafael Espindola <rafael.espindola@gmail.com> | 2007-09-28 12:53:01 +0000 |
| commit | 6c04ac1db02f8c99516147d67a858abe0a7b815c (patch) | |
| tree | 5cd484c8b5a14d2169d7a2e01ccf19b733864bbd /llvm/test/CodeGen/X86/memcpy.ll | |
| parent | 1f516560d18b879512c2a2c529e9fb0dbf68cff2 (diff) | |
| download | bcm5719-llvm-6c04ac1db02f8c99516147d67a858abe0a7b815c.tar.gz bcm5719-llvm-6c04ac1db02f8c99516147d67a858abe0a7b815c.zip | |
Refactor the memcpy lowering for the x86 target.
The only generated code difference is that now we call memcpy when
the size of the array is unknown. This matches GCC behavior and is
better since the run time value can be arbitrarily large.
llvm-svn: 42433
Diffstat (limited to 'llvm/test/CodeGen/X86/memcpy.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/memcpy.ll | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/memcpy.ll b/llvm/test/CodeGen/X86/memcpy.ll new file mode 100644 index 00000000000..97a2dd57c71 --- /dev/null +++ b/llvm/test/CodeGen/X86/memcpy.ll @@ -0,0 +1,17 @@ +; RUN: llvm-as < %s | llc -march=x86-64 | grep call.*memcpy | count 2 + +declare void @llvm.memcpy.i64(i8*, i8*, i64, i32) + +define i8* @my_memcpy(i8* %a, i8* %b, i64 %n) { +entry: + tail call void @llvm.memcpy.i64( i8* %a, i8* %b, i64 %n, i32 1 ) + ret i8* %a +} + +define i8* @my_memcpy2(i64* %a, i64* %b, i64 %n) { +entry: + %tmp14 = bitcast i64* %a to i8* + %tmp25 = bitcast i64* %b to i8* + tail call void @llvm.memcpy.i64(i8* %tmp14, i8* %tmp25, i64 %n, i32 8 ) + ret i8* %tmp14 +} |
