forked from OSchip/llvm-project
50 lines
1.5 KiB
LLVM
50 lines
1.5 KiB
LLVM
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; RUN: llc -march=hexagon -hexagon-hwloop-preheader < %s | FileCheck %s
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; Generate hardware loops when we also need to add a new preheader.
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; we should generate two hardware loops for this test case.
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; CHECK: loop0
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; CHECK: endloop0
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; CHECK: loop0
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; CHECK: endloop0
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@g = external global i32
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define void @test(i32* nocapture %a, i32* nocapture %b, i32 %n) nounwind {
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entry:
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%tobool = icmp eq i32 %n, 0
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br i1 %tobool, label %for.body4.preheader, label %for.body.preheader
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for.body.preheader:
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br label %for.body
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for.body:
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%arrayidx.phi = phi i32* [ %arrayidx.inc, %for.body ], [ %a, %for.body.preheader ]
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%i.014 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
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%0 = load i32, i32* @g, align 4
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store i32 %0, i32* %arrayidx.phi, align 4
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%inc = add nsw i32 %i.014, 1
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%exitcond15 = icmp eq i32 %inc, 3
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%arrayidx.inc = getelementptr i32, i32* %arrayidx.phi, i32 1
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br i1 %exitcond15, label %for.body4.preheader.loopexit, label %for.body
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for.body4.preheader.loopexit:
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br label %for.body4.preheader
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for.body4.preheader:
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br label %for.body4
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for.body4:
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%arrayidx5.phi = phi i32* [ %arrayidx5.inc, %for.body4 ], [ %b, %for.body4.preheader ]
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%i1.013 = phi i32 [ %inc7, %for.body4 ], [ 0, %for.body4.preheader ]
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%1 = load i32, i32* @g, align 4
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store i32 %1, i32* %arrayidx5.phi, align 4
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%inc7 = add nsw i32 %i1.013, 1
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%exitcond = icmp eq i32 %inc7, 3
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%arrayidx5.inc = getelementptr i32, i32* %arrayidx5.phi, i32 1
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br i1 %exitcond, label %for.end8, label %for.body4
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for.end8:
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ret void
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}
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