| ; 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 dso_local global double |
| |
| define void @foo() nounwind { |
| ; OPT-LABEL: foo: |
| ; OPT: # %bb.0: |
| ; OPT-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero |
| ; OPT-NEXT: xorps %xmm0, %xmm0 |
| ; OPT-NEXT: movsd %xmm0, x |
| ; OPT-NEXT: movsd %xmm0, x |
| ; OPT-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero |
| ; OPT-NEXT: retl |
| ; |
| ; NOOPT-LABEL: foo: |
| ; NOOPT: # %bb.0: |
| ; NOOPT-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero |
| ; NOOPT-NEXT: xorps %xmm0, %xmm0 |
| ; NOOPT-NEXT: movsd %xmm0, x |
| ; NOOPT-NEXT: xorps %xmm0, %xmm0 |
| ; NOOPT-NEXT: movsd %xmm0, x |
| ; NOOPT-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero |
| ; NOOPT-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 |
| } |