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1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc < %s -mtriple=i386-unknown-unknown -mattr=+sse2 | FileCheck %s --check-prefixes=CHECK,X863; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=-sse2 | FileCheck %s --check-prefixes=CHECK,X644 5; It doesn't matter if an x86-64 target has specified "no-sse2"; we still can use mfence.6 7define void @test() {8; X86-LABEL: test:9; X86: # %bb.0:10; X86-NEXT: mfence11; X86-NEXT: retl12;13; X64-LABEL: test:14; X64: # %bb.0:15; X64-NEXT: lock orl $0, -{{[0-9]+}}(%rsp)16; X64-NEXT: retq17 fence seq_cst18 ret void19}20 21define i32 @fence(ptr %ptr) {22; X86-LABEL: fence:23; X86: # %bb.0:24; X86-NEXT: movl {{[0-9]+}}(%esp), %eax25; X86-NEXT: mfence26; X86-NEXT: movl (%eax), %eax27; X86-NEXT: retl28;29; X64-LABEL: fence:30; X64: # %bb.0:31; X64-NEXT: lock orl $0, -{{[0-9]+}}(%rsp)32; X64-NEXT: movl (%rdi), %eax33; X64-NEXT: retq34 %atomic = atomicrmw add ptr %ptr, i32 0 seq_cst35 ret i32 %atomic36}37 38define void @mfence() nounwind {39; CHECK-LABEL: mfence:40; CHECK: # %bb.0:41; CHECK-NEXT: mfence42; CHECK-NEXT: ret{{[l|q]}}43 call void @llvm.x86.sse2.mfence()44 ret void45}46declare void @llvm.x86.sse2.mfence() nounwind readnone47 48