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Added asserts to prevent negative shift amounts from being generated.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7640 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Misha Brukman 2003-08-06 16:28:49 +00:00
parent 0897c60822
commit dfd414ab77
2 changed files with 4 additions and 0 deletions
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2
support/tools/TableGen/CodeEmitterGen.cpp
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@ -131,6 +131,7 @@ void CodeEmitterGen::run(std::ostream &o) {
// Mask off the right bits // Mask off the right bits
// Low mask (ie. shift, if necessary) // Low mask (ie. shift, if necessary)
assert(endBitInVar >= 0 && "Negative shift amount in masking!");
if (endBitInVar != 0) { if (endBitInVar != 0) {
o << " op" << OpOrder[Vals[i].getName()] o << " op" << OpOrder[Vals[i].getName()]
<< " >>= " << endBitInVar << ";\n"; << " >>= " << endBitInVar << ";\n";
@ -143,6 +144,7 @@ void CodeEmitterGen::run(std::ostream &o) {
<< " &= (1<<" << beginBitInVar+1 << ") - 1;\n"; << " &= (1<<" << beginBitInVar+1 << ") - 1;\n";
// Shift the value to the correct place (according to place in inst) // Shift the value to the correct place (according to place in inst)
assert(endBitInInst >= 0 && "Negative shift amount in inst position!");
if (endBitInInst != 0) if (endBitInInst != 0)
o << " op" << OpOrder[Vals[i].getName()] o << " op" << OpOrder[Vals[i].getName()]
<< " <<= " << endBitInInst << ";\n"; << " <<= " << endBitInInst << ";\n";

2
utils/TableGen/CodeEmitterGen.cpp
View File

@ -131,6 +131,7 @@ void CodeEmitterGen::run(std::ostream &o) {
// Mask off the right bits // Mask off the right bits
// Low mask (ie. shift, if necessary) // Low mask (ie. shift, if necessary)
assert(endBitInVar >= 0 && "Negative shift amount in masking!");
if (endBitInVar != 0) { if (endBitInVar != 0) {
o << " op" << OpOrder[Vals[i].getName()] o << " op" << OpOrder[Vals[i].getName()]
<< " >>= " << endBitInVar << ";\n"; << " >>= " << endBitInVar << ";\n";
@ -143,6 +144,7 @@ void CodeEmitterGen::run(std::ostream &o) {
<< " &= (1<<" << beginBitInVar+1 << ") - 1;\n"; << " &= (1<<" << beginBitInVar+1 << ") - 1;\n";
// Shift the value to the correct place (according to place in inst) // Shift the value to the correct place (according to place in inst)
assert(endBitInInst >= 0 && "Negative shift amount in inst position!");
if (endBitInInst != 0) if (endBitInInst != 0)
o << " op" << OpOrder[Vals[i].getName()] o << " op" << OpOrder[Vals[i].getName()]
<< " <<= " << endBitInInst << ";\n"; << " <<= " << endBitInInst << ";\n";