| ; RUN: llc < %s -march=x86 -mattr=sse4.1 | FileCheck %s |
| ; <rdar://problem/7859988> |
| |
| ; Make sure we don't generate more jumps than we need to. We used to generate |
| ; something like this: |
| ; |
| ; jne LBB0_1 |
| ; jnp LBB0_2 |
| ; LBB0_1: |
| ; jmp LBB0_3 |
| ; LBB0_2: |
| ; addsd ... |
| ; LBB0_3: |
| ; |
| ; Now we generate this: |
| ; |
| ; jne LBB0_2 |
| ; jp LBB0_2 |
| ; addsd ... |
| ; LBB0_2: |
| |
| ; CHECK: func |
| ; CHECK: jne [[LABEL:.*]] |
| ; CHECK-NEXT: jp [[LABEL]] |
| ; CHECK-NOT: jmp |
| |
| define float @func(float %x, float %y) nounwind readnone optsize ssp { |
| entry: |
| %0 = fpext float %x to double |
| %1 = fpext float %y to double |
| %2 = fmul double %0, %1 |
| %3 = fcmp une double %2, 0.000000e+00 |
| br i1 %3, label %bb2, label %bb1 |
| |
| bb1: |
| %4 = fadd double %2, -1.000000e+00 |
| br label %bb2 |
| |
| bb2: |
| %.0.in = phi double [ %4, %bb1 ], [ %2, %entry ] |
| %.0 = fptrunc double %.0.in to float |
| ret float %.0 |
| } |
