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| author | NAKAMURA Takumi <geek4civic@gmail.com> | 2012-12-26 06:43:14 +0000 |
|---|---|---|
| committer | NAKAMURA Takumi <geek4civic@gmail.com> | 2012-12-26 06:43:14 +0000 |
| commit | fc093def2d892a2ea068d3b9e6d5839c187cc942 (patch) | |
| tree | a275e5687c740da434cb8898015bbaf1c6393563 /utils | |
| parent | 00ba3014d8f6694b03997022259e5b266e5e112a (diff) | |
TableGen/FixedLenDecoderEmitter.cpp: Fix a potential mask overflow in fieldFromInstruction().
Reported by Yang Yongyong, thanks!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171101 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'utils')
| -rw-r--r-- | utils/TableGen/FixedLenDecoderEmitter.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/utils/TableGen/FixedLenDecoderEmitter.cpp b/utils/TableGen/FixedLenDecoderEmitter.cpp index b2dc878880..0c3017f389 100644 --- a/utils/TableGen/FixedLenDecoderEmitter.cpp +++ b/utils/TableGen/FixedLenDecoderEmitter.cpp @@ -1866,7 +1866,7 @@ static void emitFieldFromInstruction(formatted_raw_ostream &OS) { << " if (numBits == sizeof(InsnType)*8)\n" << " fieldMask = (InsnType)(-1LL);\n" << " else\n" - << " fieldMask = ((1 << numBits) - 1) << startBit;\n" + << " fieldMask = (((InsnType)1 << numBits) - 1) << startBit;\n" << " return (insn & fieldMask) >> startBit;\n" << "}\n\n"; } |