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9386601a22
When choosing the best successor for a block, ordinarily we would have preferred a block that preserves the CFG unless there is a strong probability the other direction. For small blocks that can be duplicated we now skip that requirement as well, subject to some simple frequency calculations. Differential Revision: https://reviews.llvm.org/D28583 llvm-svn: 293716
55 lines
884 B
LLVM
55 lines
884 B
LLVM
; RUN: llc -mtriple thumbv7-unknown-linux -o - %s | FileCheck %s
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declare void @x()
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declare void @y()
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define void @f(i32 %x, i32 %y) {
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; CHECK-LABEL: f:
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; CHECK: cbnz
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%p = icmp eq i32 %x, 0
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br i1 %p, label %t, label %f
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t:
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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; CHECK: cbz
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%q = icmp eq i32 %y, 0
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br i1 %q, label %t2, label %f
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t2:
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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call void @x()
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br label %f
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f:
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call void @y()
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ret void
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}
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