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Add MCRI::getNumSubRegIndices() and start checking SubRegIndex ranges.

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Apparently, NumSubRegIndices was completely unused before. Adjust it by
one to include the null subreg index, just like getNumRegs() includes
the null register.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163628 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-09-11 16:34:02 +00:00
parent ef68cfa8b8
commit 59f45e4610
4 changed files with 14 additions and 3 deletions
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3
lib/MC/MCRegisterInfo.cpp
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@@ -24,6 +24,8 @@ unsigned MCRegisterInfo::getMatchingSuperReg(unsigned Reg, unsigned SubIdx,
}
unsigned MCRegisterInfo::getSubReg(unsigned Reg, unsigned Idx) const {
assert(Idx && Idx < getNumSubRegIndices() &&
"This is not a subregister index");
// Get a pointer to the corresponding SubRegIndices list. This list has the
// name of each sub-register in the same order as MCSubRegIterator.
const uint16_t *SRI = SubRegIndices + get(Reg).SubRegIndices;
@@ -34,6 +36,7 @@ unsigned MCRegisterInfo::getSubReg(unsigned Reg, unsigned Idx) const {
}
unsigned MCRegisterInfo::getSubRegIndex(unsigned Reg, unsigned SubReg) const {
assert(SubReg && SubReg < getNumRegs() && "This is not a register");
// Get a pointer to the corresponding SubRegIndices list. This list has the
// name of each sub-register in the same order as MCSubRegIterator.
const uint16_t *SRI = SubRegIndices + get(Reg).SubRegIndices;