forked from OSchip/llvm-project
44 lines
917 B
LLVM
44 lines
917 B
LLVM
; 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
|
|
}
|