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| author | Job Noorman <jnoorman@igalia.com> | 2023-04-13 14:29:18 +0200 |
|---|---|---|
| committer | Job Noorman <jnoorman@igalia.com> | 2023-04-13 14:29:19 +0200 |
| commit | df3f1e2f31300f95845c39a76a45c95dab64cd12 (patch) | |
| tree | 43da31d56e73931432c5ce0d6019a4d3d5156e19 /bolt | |
| parent | b3ed6e545568a2b483561b416c36942ce2e5d2a2 (diff) | |
| download | llvm-df3f1e2f31300f95845c39a76a45c95dab64cd12.tar.gz | |
[BOLT][NFC] Fix UB due to left shift of negative value
The following test fails when enabling UBSan due to a left shift of a
negative value:
> runtime error: left shift of negative value -2
BOLT :: AArch64/ext-island-ref.s
This patch fixes this by using a multiplication instead of a shift.
Reviewed By: yota9
Differential Revision: https://reviews.llvm.org/D148218
Diffstat (limited to 'bolt')
| -rw-r--r-- | bolt/lib/Target/AArch64/AArch64MCPlusBuilder.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/bolt/lib/Target/AArch64/AArch64MCPlusBuilder.cpp b/bolt/lib/Target/AArch64/AArch64MCPlusBuilder.cpp index ec9f78d48981..90016ed2cd15 100644 --- a/bolt/lib/Target/AArch64/AArch64MCPlusBuilder.cpp +++ b/bolt/lib/Target/AArch64/AArch64MCPlusBuilder.cpp @@ -265,7 +265,7 @@ public: return true; } - DispImm = Inst.getOperand(I).getImm() << 2; + DispImm = Inst.getOperand(I).getImm() * 4; return true; } return false; |