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52 lines
1.8 KiB
52 lines
1.8 KiB
4 months ago
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; RUN: opt -indvars -S %s -o - | FileCheck %s
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; When bailing out in rewriteLoopExitValues() you would be left with a PHI node
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; that was not deleted, and the IndVar pass would return an incorrect modified
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; status. This was caught by the expensive check introduced in D86589.
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; CHECK-LABEL: header:
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; CHECK-NEXT: %idx = phi i64 [ %idx.next, %latch ], [ undef, %entry ]
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; CHECK-NEXT: %cond = icmp sgt i64 %n, %idx
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; CHECK-NEXT: br i1 %cond, label %end, label %inner.preheader
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; CHECK-LABEL: latch:
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; CHECK-NEXT: %idx.next = add nsw i64 %idx, -1
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; CHECK-NEXT: br label %header
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@ptr = external global i64
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define dso_local void @hoge() local_unnamed_addr {
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entry: ; preds = %entry
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%n = sdiv exact i64 undef, 40
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br label %header
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header: ; preds = %latch, %entry
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%idx = phi i64 [ %idx.next, %latch ], [ undef, %entry ]
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%cond = icmp sgt i64 %n, %idx
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br i1 %cond, label %end, label %inner
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inner: ; preds = %inner, %header
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%i = phi i64 [ %i.next, %inner ], [ 0, %header ]
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%j = phi i64 [ %j.next, %inner ], [ %n, %header ]
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%i.next = add nsw i64 %i, 1
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%j.next = add nsw i64 %j, 1
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store i64 undef, i64* @ptr
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%cond1 = icmp slt i64 %j, %idx
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br i1 %cond1, label %inner, label %inner_exit
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inner_exit: ; preds = %inner
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%indvar = phi i64 [ %i.next, %inner ]
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%indvar_use = add i64 %indvar, 1
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br label %latch
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latch: ; preds = %inner_exit
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%idx.next = add nsw i64 %idx, -1
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br label %header
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end: ; preds = %header
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ret void
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}
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