diff options
| author | Chris Lattner <sabre@nondot.org> | 2008-02-27 05:47:54 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-02-27 05:47:54 +0000 |
| commit | 20be7d70c10f0288cce88363f22f1b38b2a2cfc3 (patch) | |
| tree | 8be940e034d6e97828cebb2c98fd336a19a5ed03 /test/CodeGen/X86 | |
| parent | da872539ba284fe9ded04f4231f88c90fc77ea5c (diff) | |
| download | external_llvm-20be7d70c10f0288cce88363f22f1b38b2a2cfc3.zip external_llvm-20be7d70c10f0288cce88363f22f1b38b2a2cfc3.tar.gz external_llvm-20be7d70c10f0288cce88363f22f1b38b2a2cfc3.tar.bz2 | |
Compile x86-64-and-mask.ll into:
_test:
movl %edi, %eax
ret
instead of:
_test:
movl $4294967295, %ecx
movq %rdi, %rax
andq %rcx, %rax
ret
It would be great to write this as a Pat pattern that used subregs
instead of a 'pseudo' instruction, but I don't know how to do that
in td files.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47658 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86')
| -rw-r--r-- | test/CodeGen/X86/x86-64-and-mask.ll | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/test/CodeGen/X86/x86-64-and-mask.ll b/test/CodeGen/X86/x86-64-and-mask.ll new file mode 100644 index 0000000..3d61e5d --- /dev/null +++ b/test/CodeGen/X86/x86-64-and-mask.ll @@ -0,0 +1,12 @@ +; RUN: llvm-as < %s | llc | grep {movl.*%edi, %eax} +; This should be a single mov, not a load of immediate + andq. + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" +target triple = "x86_64-apple-darwin8" + +define i64 @test(i64 %x) nounwind { +entry: + %tmp123 = and i64 %x, 4294967295 ; <i64> [#uses=1] + ret i64 %tmp123 +} + |