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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2023-12-22 13:53:49 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2023-12-22 14:16:54 +0000 |
| commit | 3736e1d1cd5c24b554a13e493c8614f458bdf123 (patch) | |
| tree | 061c77d663a908b98b72a31ef2329974c8f5bed2 /llvm/test/Analysis | |
| parent | efeb546865c233dfa7706ee0316c676de9f69897 (diff) | |
| download | llvm-3736e1d1cd5c24b554a13e493c8614f458bdf123.zip llvm-3736e1d1cd5c24b554a13e493c8614f458bdf123.tar.gz llvm-3736e1d1cd5c24b554a13e493c8614f458bdf123.tar.bz2 | |
[SCEV] Ensure shift amount is in range before calling getZExtValue()
Fixes #76234
Diffstat (limited to 'llvm/test/Analysis')
| -rw-r--r-- | llvm/test/Analysis/ScalarEvolution/pr76234.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/llvm/test/Analysis/ScalarEvolution/pr76234.ll b/llvm/test/Analysis/ScalarEvolution/pr76234.ll new file mode 100644 index 0000000..0d82f0e --- /dev/null +++ b/llvm/test/Analysis/ScalarEvolution/pr76234.ll @@ -0,0 +1,23 @@ +; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4 +; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" 2>&1 | FileCheck %s + +; Reduced from https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65278 +define i32 @PR76234() { +; CHECK-LABEL: 'PR76234' +; CHECK-NEXT: Classifying expressions for: @PR76234 +; CHECK-NEXT: %B9 = shl i896 0, -264147265567832623176169892458258303259423663018060761063980354513336951278362429737208627943828593947337197496628564339441173779751342768625269489231469788454193341999502542084365758838213220526512116454105594202074014146375780869419198449383518238244769290448868999168 +; CHECK-NEXT: --> %B9 U: [0,1) S: [0,1) +; CHECK-NEXT: %B39 = ashr i896 %B9, 1 +; CHECK-NEXT: --> %B39 U: [0,1) S: [0,1) Exits: <<Unknown>> LoopDispositions: { %1: Variant } +; CHECK-NEXT: Determining loop execution counts for: @PR76234 +; CHECK-NEXT: Loop %1: <multiple exits> Unpredictable backedge-taken count. +; CHECK-NEXT: Loop %1: Unpredictable constant max backedge-taken count. +; CHECK-NEXT: Loop %1: Unpredictable symbolic max backedge-taken count. +; CHECK-NEXT: Loop %1: Unpredictable predicated backedge-taken count. +; + %B9 = shl i896 0, -264147265567832623176169892458258303259423663018060761063980354513336951278362429737208627943828593947337197496628564339441173779751342768625269489231469788454193341999502542084365758838213220526512116454105594202074014146375780869419198449383518238244769290448868999168 + br label %1 +1: + %B39 = ashr i896 %B9, 1 + br label %1 +} |