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367ed95f05
Prevent `createNodeFromSelectLikePHI` from creating SCEV expressions that break LCSSA. A better fix for the same issue is to teach SCEVExpander to not break LCSSA by inserting PHI nodes at appropriate places. That's planned for the future. Fixes PR25360. llvm-svn: 251756
34 lines
1.1 KiB
LLVM
34 lines
1.1 KiB
LLVM
; RUN: opt -indvars -S < %s | FileCheck %s
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; Ensure that does not crash
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define void @f() {
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; CHECK-LABEL: @f(
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entry:
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br label %for.end
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for.condt: ; preds = %for.end
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br i1 true, label %for.cond.0, label %for.end
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for.end: ; preds = %for.body.3
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%inc = select i1 undef, i32 2, i32 1
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br i1 false, label %for.condt, label %for.cond.0
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for.cond.0: ; preds = %for.end, %for.condt
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%init = phi i32 [ 0, %for.condt ], [ %inc, %for.end ]
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br i1 true, label %for.end.13, label %for.body.9
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for.body.9: ; preds = %for.body.9, %for.cond.0
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%p1.addr.22 = phi i32 [ %inc10, %for.body.9 ], [ %init, %for.cond.0 ]
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%inc10 = add i32 %p1.addr.22, 1
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br i1 true, label %for.end.13, label %for.body.9
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for.end.13: ; preds = %for.cond.7.for.end.13_crit_edge, %for.cond.0
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%p1.addr.2.lcssa = phi i32 [ %inc10, %for.body.9 ], [ %init, %for.cond.0 ]
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ret void
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}
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