forked from OSchip/llvm-project
57 lines
2.3 KiB
LLVM
57 lines
2.3 KiB
LLVM
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; RUN: opt -S -analyze -scalar-evolution -loop-deletion -scalar-evolution < %s | FileCheck %s --check-prefix=SCEV-EXPRS
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; RUN: opt -S -loop-deletion < %s | FileCheck %s --check-prefix=IR-AFTER-TRANSFORM
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; RUN: opt -S -indvars -loop-deletion -indvars < %s | FileCheck %s --check-prefix=ORIGINAL-CRASH
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; Checking for a crash. Loop-deletion would change the loop
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; disposition of an instruction, but not update SCEV.
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.11.0"
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define void @pr27570() {
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; IR-AFTER-TRANSFORM-LABEL: @pr27570(
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; ORIGINAL-CRASH: @pr27570(
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entry:
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br label %for.cond
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for.cond: ; preds = %for.cond14, %entry
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%f.0 = phi i32 [ 20, %entry ], [ 0, %for.cond14 ]
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br label %for.body
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for.body: ; preds = %for.inc11, %for.cond
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; IR-AFTER-TRANSFORM: for.body:
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; IR-AFTER-TRANSFORM: %cmp = icmp eq i32 %val, -1
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; IR-AFTER-TRANSFORM: %conv7 = zext i1 %cmp to i32
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; IR-AFTER-TRANSFORM: for.body6:
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; SCEV-EXPRS: %conv7 = zext i1 %cmp to i32
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; SCEV-EXPRS: %conv7 = zext i1 %cmp to i32
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; SCEV-EXPRS-NEXT: --> {{.*}} LoopDispositions: { %for.body: Variant, %for.cond: Variant, %for.body6: Invariant }
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%val = phi i32 [ -20, %for.cond ], [ %inc12, %for.inc11 ]
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%g.040 = phi i32 [ -20, %for.cond ], [ %and.lcssa, %for.inc11 ]
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br label %for.body6
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for.body6: ; preds = %for.body6, %for.body
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%h.039 = phi i32 [ 1, %for.body ], [ %inc, %for.body6 ]
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%g.138 = phi i32 [ %g.040, %for.body ], [ %and, %for.body6 ]
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%cmp = icmp eq i32 %val, -1
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%conv7 = zext i1 %cmp to i32
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%add.i = add nsw i32 %conv7, %h.039
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%sext = shl i32 %add.i, 24
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%conv8 = ashr exact i32 %sext, 24
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%cmp9 = icmp eq i32 %conv8, %f.0
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%conv10 = zext i1 %cmp9 to i32
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%and = and i32 %conv10, %g.138
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%inc = add i32 %h.039, 1
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br i1 undef, label %for.inc11, label %for.body6
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for.inc11: ; preds = %for.body6
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%and.lcssa = phi i32 [ %and, %for.body6 ]
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%inc12 = add nsw i32 %val, 1
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%tobool = icmp eq i32 %inc12, 0
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br i1 %tobool, label %for.cond14, label %for.body
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for.cond14: ; preds = %for.cond14, %for.inc11
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br i1 undef, label %for.cond, label %for.cond14
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}
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