38 lines
960 B
LLVM
38 lines
960 B
LLVM
|
; 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
|
||
|
|
}
|
||
|
|
|