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