1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc < %s -mtriple=i386-unknown-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X32 3; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=-sse2 | FileCheck %s --check-prefix=X64 4 5; It doesn't matter if an x86-64 target has specified "no-sse2"; we still can use mfence. 6 7define void @test() { 8; X32-LABEL: test: 9; X32: # %bb.0: 10; X32-NEXT: mfence 11; X32-NEXT: retl 12; 13; X64-LABEL: test: 14; X64: # %bb.0: 15; X64-NEXT: mfence 16; X64-NEXT: retq 17 fence seq_cst 18 ret void 19} 20 21define i32 @fence(i32* %ptr) { 22; X32-LABEL: fence: 23; X32: # %bb.0: 24; X32-NEXT: movl {{[0-9]+}}(%esp), %eax 25; X32-NEXT: mfence 26; X32-NEXT: movl (%eax), %eax 27; X32-NEXT: retl 28; 29; X64-LABEL: fence: 30; X64: # %bb.0: 31; X64-NEXT: mfence 32; X64-NEXT: movl (%rdi), %eax 33; X64-NEXT: retq 34 %atomic = atomicrmw add i32* %ptr, i32 0 seq_cst 35 ret i32 %atomic 36} 37 38