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b41d9938e1
This fixes a crash found by the oss fuzzer and reported by @fhahn. The suggestion of @RKSimon seems to be the correct fix here. (See D91343). The oss fuzz report can be found here: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32759 Reviewed By: lebedev.ri Differential Revision: https://reviews.llvm.org/D99792
30 lines
873 B
LLVM
30 lines
873 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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target datalayout = "n32"
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define i1 @oss_fuzz_32759(i1 %y) {
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; CHECK-LABEL: @oss_fuzz_32759(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 undef, label [[COND_TRUE:%.*]], label [[END:%.*]]
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; CHECK: cond.true:
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; CHECK-NEXT: br label [[END]]
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; CHECK: end:
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; CHECK-NEXT: ret i1 false
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;
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entry:
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br i1 undef, label %cond.true, label %end
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cond.true: ; preds = %entry
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%zy = zext i1 %y to i32
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%B6 = shl i32 %zy, 2147483647
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%B3 = ashr i32 %B6, 2147483647
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%B7 = srem i32 %B3, 123
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%cond = xor i32 %B7, %B3
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br label %end
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end: ; preds = %cond.true, %entry
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%p = phi i32 [ %cond, %cond.true ], [ -1, %entry ]
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%r = icmp eq i32 %p, 0
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ret i1 %r
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}
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