diff options
| author | Daniel Dunbar <daniel@zuster.org> | 2010-08-27 01:30:14 +0000 |
|---|---|---|
| committer | Daniel Dunbar <daniel@zuster.org> | 2010-08-27 01:30:14 +0000 |
| commit | d8d36e61fd88fa91132c0c1906805aba99ccd625 (patch) | |
| tree | 44f01924662a34a94a3e223456a49a2950565b3f /test | |
| parent | 4cf81c47fe060fad290ea6b95388d1da7fad105a (diff) | |
| download | external_llvm-d8d36e61fd88fa91132c0c1906805aba99ccd625.zip external_llvm-d8d36e61fd88fa91132c0c1906805aba99ccd625.tar.gz external_llvm-d8d36e61fd88fa91132c0c1906805aba99ccd625.tar.bz2 | |
X86: Fix an encoding issue with LOCK_ADD64mr, which could lead to very hard to find miscompiles with the integrated assembler.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112250 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/lock-inst-encoding.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test/CodeGen/X86/lock-inst-encoding.ll b/test/CodeGen/X86/lock-inst-encoding.ll new file mode 100644 index 0000000..03468e2 --- /dev/null +++ b/test/CodeGen/X86/lock-inst-encoding.ll @@ -0,0 +1,22 @@ +; RUN: llc -O0 --show-mc-encoding < %s | FileCheck %s + +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-n8:16:32:64" +target triple = "x86_64-apple-darwin10.0.0" + +; CHECK: f0: +; CHECK: addq %rax, (%rdi) +; CHECK: # encoding: [0xf0,0x48,0x01,0x07] +; CHECK: ret +define void @f0(i64* %a0) { + %t0 = and i64 1, 1 + call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 true) nounwind + %1 = call i64 @llvm.atomic.load.add.i64.p0i64(i64* %a0, i64 %t0) nounwind + call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 true) nounwind + ret void +} + +declare void @llvm.memory.barrier(i1, i1, i1, i1, i1) nounwind + +declare i32 @llvm.atomic.load.and.i32.p0i32(i32* nocapture, i32) nounwind + +declare i64 @llvm.atomic.load.add.i64.p0i64(i64* nocapture, i64) nounwind |