derek.holloway
7502bf64a4
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34 lines
877 B
LLVM
34 lines
877 B
LLVM
; RUN: opt < %s -passes=indvars -S | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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; PR25372
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; We can compute the expression of %phi0 and that is a SCEV
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; constant. However, instcombine can't deduce this, so we can
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; potentially end up trying to handle a constant when replacing
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; congruent IVs.
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; CHECK-LABEL: crash
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define void @crash(i1 %arg) {
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entry:
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br i1 false, label %not_taken, label %pre
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not_taken:
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br label %pre
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pre:
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; %phi0.pre and %phi1.pre are evaluated by SCEV to constant 0.
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%phi0.pre = phi i32 [ 0, %entry ], [ 2, %not_taken ]
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%phi1.pre = phi i32 [ 0, %entry ], [ 1, %not_taken ]
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br label %loop
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loop:
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; %phi0 and %phi1 are evaluated by SCEV to constant 0.
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%phi0 = phi i32 [ 0, %loop ], [ %phi0.pre, %pre ]
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%phi1 = phi i32 [ 0, %loop ], [ %phi1.pre, %pre ]
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br i1 %arg, label %exit, label %loop
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exit:
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ret void
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}
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