45 lines
2.0 KiB
LLVM
45 lines
2.0 KiB
LLVM
; RUN: opt < %s -loop-interchange -simplifycfg -S | FileCheck %s
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; no_deps_interchange just access a single nested array and can be interchange.
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define i32 @no_deps_interchange([1024 x i32]* nocapture %Arr, i32 %k) local_unnamed_addr #0 {
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entry:
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br label %for.body
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for.body: ; preds = %entry, %for.cond.cleanup3
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%indvars.iv19 = phi i64 [ 0, %entry ], [ %indvars.iv.next20, %for.cond.cleanup3 ]
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br label %for.body4
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for.body4: ; preds = %for.body, %for.body4
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%indvars.iv = phi i64 [ 0, %for.body ], [ %indvars.iv.next, %for.body4 ]
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%arrayidx6 = getelementptr inbounds [1024 x i32], [1024 x i32]* %Arr, i64 %indvars.iv, i64 %indvars.iv19
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store i32 0, i32* %arrayidx6, 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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for.cond.cleanup3: ; preds = %for.body4
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%indvars.iv.next20 = add nuw nsw i64 %indvars.iv19, 1
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%exitcond21 = icmp ne i64 %indvars.iv.next20, 1024
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br i1 %exitcond21, label %for.body, label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond.cleanup3
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ret i32 0
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}
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; CHECK-LABEL: @no_deps_interchange
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; CHECK-LABEL: entry:
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; CHECK-NEXT: br label %for.body4
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; CHECK-LABEL: for.body: ; preds = %for.body4, %for.body
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; CHECK: %indvars.iv19 = phi i64 [ %indvars.iv.next20, %for.body ], [ 0, %for.body4 ]
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; CHECK: br i1 %exitcond21, label %for.body, label %for.body4.split
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; CHECK-LABEL: for.body4: ; preds = %entry, %for.body4.split
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; CHECK: %indvars.iv = phi i64 [ %indvars.iv.next, %for.body4.split ], [ 0, %entry ]
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; CHECK: br label %for.body
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; CHECK-LABEL: for.body4.split: ; preds = %for.body
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; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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; CHECK: br i1 %exitcond, label %for.body4, label %for.cond.cleanup
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