volatile.ll
931 Bytes
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-- -mattr=sse2 | FileCheck %s -check-prefixes=ALL,OPT
; RUN: llc < %s -mtriple=i686-- -mattr=sse2 -O0 | FileCheck %s --check-prefixes=ALL,NOOPT
@x = external global double
define void @foo() nounwind {
; ALL-LABEL: foo:
; ALL: # %bb.0:
; ALL-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
; ALL-NEXT: xorps %xmm0, %xmm0
; ALL-NEXT: movsd %xmm0, x
; ALL-NEXT: movsd %xmm0, x
; ALL-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
; ALL-NEXT: retl
%a = load volatile double, double* @x
store volatile double 0.0, double* @x
store volatile double 0.0, double* @x
%b = load volatile double, double* @x
ret void
}
define void @bar() nounwind {
; ALL-LABEL: bar:
; ALL: # %bb.0:
; ALL-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
; ALL-NEXT: retl
%c = load volatile double, double* @x
ret void
}