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df28ea253e
If possible and profitable, replace lea %reg, 1(%reg) and lea %reg, -1(%reg) with inc %reg and dec %reg respectively. Patch by: anton.nadolsky@intel.com Differential Revision: http://reviews.llvm.org/D14059 llvm-svn: 252722
35 lines
697 B
LLVM
35 lines
697 B
LLVM
;RUN: llc < %s -march=x86 | FileCheck %s
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define void @foo(i32 inreg %dns) minsize {
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entry:
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; CHECK-LABEL: foo
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; CHECK: dec
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br label %for.body
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for.body:
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%i.05 = phi i16 [ %dec, %for.body ], [ 0, %entry ]
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%dec = add i16 %i.05, -1
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%conv = zext i16 %dec to i32
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%cmp = icmp slt i32 %conv, %dns
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br i1 %cmp, label %for.body, label %for.end
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for.end:
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ret void
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}
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define void @bar(i32 inreg %dns) minsize {
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entry:
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; CHECK-LABEL: bar
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; CHECK: inc
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br label %for.body
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for.body:
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%i.05 = phi i16 [ %inc, %for.body ], [ 0, %entry ]
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%inc = add i16 %i.05, 1
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%conv = zext i16 %inc to i32
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%cmp = icmp slt i32 %conv, %dns
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br i1 %cmp, label %for.body, label %for.end
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for.end:
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ret void
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}
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