diff options
Diffstat (limited to 'test/CodeGen/X86/mfence.ll')
| -rw-r--r-- | test/CodeGen/X86/mfence.ll | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/test/CodeGen/X86/mfence.ll b/test/CodeGen/X86/mfence.ll index 6056adddcb4b..b67a5c355044 100644 --- a/test/CodeGen/X86/mfence.ll +++ b/test/CodeGen/X86/mfence.ll @@ -1,8 +1,37 @@ -; RUN: llc < %s -march=x86 -mattr=+sse2 | not grep sfence -; RUN: llc < %s -march=x86 -mattr=+sse2 | not grep lfence -; RUN: llc < %s -march=x86 -mattr=+sse2 | grep mfence +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py +; RUN: llc < %s -mtriple=i386-unknown-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X32 +; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=-sse2 | FileCheck %s --check-prefix=X64 + +; It doesn't matter if an x86-64 target has specified "no-sse2"; we still can use mfence. define void @test() { +; X32-LABEL: test: +; X32: # BB#0: +; X32-NEXT: mfence +; X32-NEXT: retl +; +; X64-LABEL: test: +; X64: # BB#0: +; X64-NEXT: mfence +; X64-NEXT: retq fence seq_cst ret void } + +define i32 @fence(i32* %ptr) { +; X32-LABEL: fence: +; X32: # BB#0: +; X32-NEXT: movl {{[0-9]+}}(%esp), %eax +; X32-NEXT: mfence +; X32-NEXT: movl (%eax), %eax +; X32-NEXT: retl +; +; X64-LABEL: fence: +; X64: # BB#0: +; X64-NEXT: mfence +; X64-NEXT: movl (%rdi), %eax +; X64-NEXT: retq + %atomic = atomicrmw add i32* %ptr, i32 0 seq_cst + ret i32 %atomic +} + |