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f4be6ae977
those are in the same basic block. The previous approach was the topological order of the basic block. By default this rule is disabled. Related to PR22768. llvm-svn: 233241
33 lines
1.2 KiB
LLVM
33 lines
1.2 KiB
LLVM
; RUN: llc < %s -march=x86 | FileCheck %s
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; RUN: llc -no-phi-elim-live-out-early-exit -terminal-rule < %s -march=x86 | FileCheck %s
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; PR2659
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define i32 @binomial(i32 %n, i32 %k) nounwind {
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entry:
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%cmp = icmp ugt i32 %k, %n ; <i1> [#uses=1]
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br i1 %cmp, label %ifthen, label %forcond.preheader
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forcond.preheader: ; preds = %entry
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%cmp44 = icmp eq i32 %k, 0 ; <i1> [#uses=1]
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br i1 %cmp44, label %afterfor, label %forbody
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ifthen: ; preds = %entry
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ret i32 0
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; CHECK: forbody
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; CHECK-NOT: mov
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forbody: ; preds = %forbody, %forcond.preheader
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%indvar = phi i32 [ 0, %forcond.preheader ], [ %divisor.02, %forbody ] ; <i32> [#uses=3]
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%accumulator.01 = phi i32 [ 1, %forcond.preheader ], [ %div, %forbody ] ; <i32> [#uses=1]
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%divisor.02 = add i32 %indvar, 1 ; <i32> [#uses=2]
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%n.addr.03 = sub i32 %n, %indvar ; <i32> [#uses=1]
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%mul = mul i32 %n.addr.03, %accumulator.01 ; <i32> [#uses=1]
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%div = udiv i32 %mul, %divisor.02 ; <i32> [#uses=2]
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%inc = add i32 %indvar, 2 ; <i32> [#uses=1]
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%cmp4 = icmp ugt i32 %inc, %k ; <i1> [#uses=1]
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br i1 %cmp4, label %afterfor, label %forbody
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afterfor: ; preds = %forbody, %forcond.preheader
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%accumulator.0.lcssa = phi i32 [ 1, %forcond.preheader ], [ %div, %forbody ] ; <i32> [#uses=1]
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ret i32 %accumulator.0.lcssa
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}
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