37 lines
1.5 KiB
LLVM
37 lines
1.5 KiB
LLVM
; Check for recognizing the "memmove" idiom.
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; RUN: opt -basic-aa -hexagon-loop-idiom -S -mtriple hexagon-unknown-elf < %s \
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; RUN: | FileCheck %s
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; CHECK: call void @llvm.memmove
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; Function Attrs: norecurse nounwind
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define void @foo(i32* nocapture %A, i32* nocapture readonly %B, i32 %n) #0 {
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entry:
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%cmp1 = icmp sgt i32 %n, 0
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br i1 %cmp1, label %for.body.preheader, label %for.end
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for.body.preheader: ; preds = %entry
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%arrayidx.gep = getelementptr i32, i32* %B, i32 0
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%arrayidx1.gep = getelementptr i32, i32* %A, i32 0
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%arrayidx.phi = phi i32* [ %arrayidx.gep, %for.body.preheader ], [ %arrayidx.inc, %for.body ]
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%arrayidx1.phi = phi i32* [ %arrayidx1.gep, %for.body.preheader ], [ %arrayidx1.inc, %for.body ]
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%i.02 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
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%0 = load i32, i32* %arrayidx.phi, align 4
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store i32 %0, i32* %arrayidx1.phi, align 4
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%inc = add nuw nsw i32 %i.02, 1
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%exitcond = icmp ne i32 %inc, %n
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%arrayidx.inc = getelementptr i32, i32* %arrayidx.phi, i32 1
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%arrayidx1.inc = getelementptr i32, i32* %arrayidx1.phi, i32 1
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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}
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attributes #0 = { nounwind }
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