X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FMC%2FMCRegisterInfo.cpp;h=5c71106c90172d704a69547d61b00fde65b84cdd;hb=6c583141bf6b7a6b5f8125c1037ecbc089813288;hp=4d1aff3e427e90f457ef3bbcf770c354a9b3ddc8;hpb=46c0dc7858da65707340ca62b258f8956def78e8;p=oota-llvm.git

diff --git a/lib/MC/MCRegisterInfo.cpp b/lib/MC/MCRegisterInfo.cpp
index 4d1aff3e427..5c71106c901 100644
--- a/lib/MC/MCRegisterInfo.cpp
+++ b/lib/MC/MCRegisterInfo.cpp
@@ -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;