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| author | Chris Lattner <sabre@nondot.org> | 2008-02-21 04:55:52 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-02-21 04:55:52 +0000 |
| commit | 83c93d5afd33fcce0f0e020af6c827c78a1b38cf (patch) | |
| tree | 996aa3bd0932b79cfee8015e518d23febc86cd33 /llvm/test/CodeGen/X86/2008-02-20-InlineAsmClobber.ll | |
| parent | ad582fc34b85064700ab35660d4692815779b56c (diff) | |
| download | bcm5719-llvm-83c93d5afd33fcce0f0e020af6c827c78a1b38cf.tar.gz bcm5719-llvm-83c93d5afd33fcce0f0e020af6c827c78a1b38cf.zip | |
Fix a (harmless) but where vregs were added to the used reg lists for
inline asms.
Fix PR2078 by marking aliases of registers used when a register is
marked used. This prevents EAX from being allocated when AX is listed
in the clobber set for the asm.
llvm-svn: 47426
Diffstat (limited to 'llvm/test/CodeGen/X86/2008-02-20-InlineAsmClobber.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/2008-02-20-InlineAsmClobber.ll | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/2008-02-20-InlineAsmClobber.ll b/llvm/test/CodeGen/X86/2008-02-20-InlineAsmClobber.ll new file mode 100644 index 00000000000..94f4e18250a --- /dev/null +++ b/llvm/test/CodeGen/X86/2008-02-20-InlineAsmClobber.ll @@ -0,0 +1,15 @@ +; RUN: llvm-as < %s | llc | grep {%ecx %ecx} +; PR2078 +; The clobber list says that "ax" is clobbered. Make sure that eax isn't +; allocated to the input/output register. +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" +target triple = "i386-apple-darwin8" +@pixels = weak global i32 0 ; <i32*> [#uses=2] + +define void @test() nounwind { +entry: + %tmp = load i32* @pixels, align 4 ; <i32> [#uses=1] + %tmp1 = tail call i32 asm sideeffect "$0 $1", "=r,0,~{dirflag},~{fpsr},~{flags},~{ax}"( i32 %tmp ) nounwind ; <i32> [#uses=1] + store i32 %tmp1, i32* @pixels, align 4 + ret void +} |
