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