diff options
| -rw-r--r-- | include/llvm/Target/TargetRegisterInfo.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/include/llvm/Target/TargetRegisterInfo.h b/include/llvm/Target/TargetRegisterInfo.h index 7e73db3a44..949fce8461 100644 --- a/include/llvm/Target/TargetRegisterInfo.h +++ b/include/llvm/Target/TargetRegisterInfo.h @@ -337,9 +337,15 @@ public: if (regA == regB) return true; if (isVirtualRegister(regA) || isVirtualRegister(regB)) return false; - for (const uint16_t *regList = getOverlaps(regA)+1; *regList; ++regList) { - if (*regList == regB) return true; - } + + // Regunits are numerically ordered. Find a common unit. + MCRegUnitIterator RUA(regA, this); + MCRegUnitIterator RUB(regB, this); + do { + if (*RUA == *RUB) return true; + if (*RUA < *RUB) ++RUA; + else ++RUB; + } while (RUA.isValid() && RUB.isValid()); return false; } |