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| author | Dale Johannesen <dalej@apple.com> | 2008-09-17 21:13:11 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@apple.com> | 2008-09-17 21:13:11 +0000 |
| commit | 91aac1015e6714d959801dd8d60f55a72827dc4d (patch) | |
| tree | c8440b8031a0fe3d7c63fcf9145ffc930759c547 /test/CodeGen/X86/2008-09-17-inline-asm-1.ll | |
| parent | 870e4bef419b1bd3e5ee05673975f1c05198b612 (diff) | |
| download | llvm-91aac1015e6714d959801dd8d60f55a72827dc4d.tar.gz llvm-91aac1015e6714d959801dd8d60f55a72827dc4d.tar.bz2 llvm-91aac1015e6714d959801dd8d60f55a72827dc4d.tar.xz | |
Add a bit to mark operands of asm's that conflict
with an earlyclobber operand elsewhere. Propagate
this bit and the earlyclobber bit through SDISel.
Change linear-scan RA not to allocate regs in a way
that conflicts with an earlyclobber. See also comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56290 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/2008-09-17-inline-asm-1.ll')
| -rw-r--r-- | test/CodeGen/X86/2008-09-17-inline-asm-1.ll | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2008-09-17-inline-asm-1.ll b/test/CodeGen/X86/2008-09-17-inline-asm-1.ll new file mode 100644 index 0000000000..96052a6043 --- /dev/null +++ b/test/CodeGen/X86/2008-09-17-inline-asm-1.ll @@ -0,0 +1,24 @@ +; RUN: llvm-as < %s | llc -o - -march=x86 | not grep "movl %eax, %eax" +; RUN: llvm-as < %s | llc -o - -march=x86 | not grep "movl %edx, %edx" +; RUN: llvm-as < %s | llc -o - -march=x86 | not grep "movl (%eax), %eax" +; RUN: llvm-as < %s | llc -o - -march=x86 | not grep "movl (%edx), %edx" + +; %0 must not be put in EAX or EDX. +; In the first asm, $0 and $2 must not be put in EAX. +; In the second asm, $0 and $2 must not be put in EDX. +; This is kind of hard to test thoroughly, but the things above should continue +; to pass, I think. +; ModuleID = '<stdin>' +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" +@x = common global i32 0 ; <i32*> [#uses=1] + +define i32 @aci(i32* %pw) nounwind { +entry: + %0 = load i32* @x, align 4 ; <i32> [#uses=1] + %asmtmp = tail call { i32, i32 } asm "movl $0, %eax\0A\090:\0A\09test %eax, %eax\0A\09je 1f\0A\09movl %eax, $2\0A\09incl $2\0A\09lock\0A\09cmpxchgl $2, $0\0A\09jne 0b\0A\091:", "=*m,=&{ax},=&r,*m,~{dirflag},~{fpsr},~{flags},~{memory},~{cc}"(i32* %pw, i32* %pw) nounwind ; <{ i32, i32 }> [#uses=0] + %asmtmp2 = tail call { i32, i32 } asm "movl $0, %edx\0A\090:\0A\09test %edx, %edx\0A\09je 1f\0A\09movl %edx, $2\0A\09incl $2\0A\09lock\0A\09cmpxchgl $2, $0\0A\09jne 0b\0A\091:", "=*m,=&{dx},=&r,*m,~{dirflag},~{fpsr},~{flags},~{memory},~{cc}"(i32* %pw, i32* %pw) nounwind ; <{ i32, i32 }> [#uses=1] + %asmresult3 = extractvalue { i32, i32 } %asmtmp2, 0 ; <i32> [#uses=1] + %1 = add i32 %asmresult3, %0 ; <i32> [#uses=1] + ret i32 %1 +} |