derek.holloway
7502bf64a4
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45 lines
1.8 KiB
LLVM
45 lines
1.8 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt < %s -passes=loop-interchange -S -debug 2>&1 | FileCheck %s
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; CHECK: Dependency matrix before interchange:
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; CHECK-NEXT: = *
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; CHECK-NEXT: < *
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; CHECK-NEXT: Processing InnerLoopId
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; This example is taken from github issue #54176
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;
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define void @foo(i32 noundef %n, i32 noundef %m, ptr nocapture noundef noalias %aa, ptr nocapture noundef readonly noalias %bb, ptr nocapture noundef writeonly noalias %cc) {
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entry:
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%arrayidx7 = getelementptr inbounds i8, ptr %aa, i64 512
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br label %for.cond1.preheader
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for.cond1.preheader:
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%indvars.iv32 = phi i64 [ 1, %entry ], [ %indvars.iv.next33, %for.cond.cleanup3 ]
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%0 = add nsw i64 %indvars.iv32, -1
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%arrayidx9 = getelementptr inbounds [128 x float], ptr %arrayidx7, i64 0, i64 %0
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%arrayidx12 = getelementptr inbounds [128 x float], ptr %arrayidx7, i64 0, i64 %indvars.iv32
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br label %for.body4
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for.cond.cleanup:
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ret void
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for.cond.cleanup3:
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%indvars.iv.next33 = add nuw nsw i64 %indvars.iv32, 1
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%exitcond36 = icmp ne i64 %indvars.iv.next33, 128
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br i1 %exitcond36, label %for.cond1.preheader, label %for.cond.cleanup
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for.body4:
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%indvars.iv = phi i64 [ 1, %for.cond1.preheader ], [ %indvars.iv.next, %for.body4 ]
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%arrayidx6 = getelementptr inbounds [128 x float], ptr %bb, i64 %indvars.iv, i64 %indvars.iv32
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%1 = load float, ptr %arrayidx6, align 4
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%2 = load float, ptr %arrayidx9, align 4
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%add = fadd fast float %2, %1
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store float %add, ptr %arrayidx9, align 4
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%3 = load float, ptr %arrayidx12, align 4
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%arrayidx16 = getelementptr inbounds [128 x float], ptr %cc, i64 %indvars.iv, i64 %indvars.iv32
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store float %3, ptr %arrayidx16, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp ne i64 %indvars.iv.next, 1024
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br i1 %exitcond, label %for.body4, label %for.cond.cleanup3
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}
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