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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 | 7cbeb2431c7264d0848d1343f43914f970828ac7 (patch) | |
| tree | ecadd35d333d99053d8c8191802004f74ad77b8b /test | |
| parent | db71d63467bdb7b629641fee3272b47bd028e09f (diff) | |
| download | external_llvm-7cbeb2431c7264d0848d1343f43914f970828ac7.zip external_llvm-7cbeb2431c7264d0848d1343f43914f970828ac7.tar.gz external_llvm-7cbeb2431c7264d0848d1343f43914f970828ac7.tar.bz2 | |
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47426 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/2008-02-20-InlineAsmClobber.ll | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2008-02-20-InlineAsmClobber.ll b/test/CodeGen/X86/2008-02-20-InlineAsmClobber.ll new file mode 100644 index 0000000..94f4e18 --- /dev/null +++ b/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 +} |