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Fix shift overflow bug that would occur when a field was a full 32-bits

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in tblgen.  This is PR2827, thanks to Waldemar Knorr for tracking this
down.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57124 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-10-05 18:31:58 +00:00
parent 834eb40f44
commit 1cfa0776c3
1 changed files with 1 additions and 1 deletions
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2
utils/TableGen/CodeEmitterGen.cpp
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@ -191,7 +191,7 @@ void CodeEmitterGen::run(std::ostream &o) {
gotOp = true; gotOp = true;
} }
unsigned opMask = (1 << N) - 1; unsigned opMask = ~0U >> (32-N);
int opShift = beginVarBit - N + 1; int opShift = beginVarBit - N + 1;
opMask <<= opShift; opMask <<= opShift;
opShift = beginInstBit - beginVarBit; opShift = beginInstBit - beginVarBit;