6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-18 13:34:04 +00:00
Code Issues Projects Releases Wiki Activity

TableGen: Avoid undefined behaviour by doing this shift in int64

Browse Source 
Found by ubsan. This was taking a bool and left shifting by 32 - the
result is 64 bit, so we should really do the math in a type it fits
in.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237345 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Justin Bogner 2015-05-14 06:47:02 +00:00
parent bed1965111
commit f8ca978417
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/TableGen/Record.cpp
View File

@ -230,7 +230,7 @@ Init *IntRecTy::convertValue(BitsInit *BI) {
int64_t Result = 0;
for (unsigned i = 0, e = BI->getNumBits(); i != e; ++i)
if (BitInit *Bit = dyn_cast<BitInit>(BI->getBit(i)))
Result |= Bit->getValue() << i;
Result |= static_cast<int64_t>(Bit->getValue()) << i;
else
return nullptr;
return IntInit::get(Result);