diff options
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.cpp | 12 | ||||
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.h | 3 |
2 files changed, 15 insertions, 0 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp index 70402f3fdb..23242e3edf 100644 --- a/lib/Target/X86/X86RegisterInfo.cpp +++ b/lib/Target/X86/X86RegisterInfo.cpp @@ -112,6 +112,18 @@ X86RegisterInfo::getSEHRegNum(unsigned i) const { } const TargetRegisterClass * +X86RegisterInfo::getSubClassWithSubReg(const TargetRegisterClass *RC, + unsigned Idx) const { + // The sub_8bit sub-register index is more constrained in 32-bit mode. + // It behaves just like the sub_8bit_hi index. + if (!Is64Bit && Idx == X86::sub_8bit) + Idx = X86::sub_8bit_hi; + + // Forward to TableGen's default version. + return X86GenRegisterInfo::getSubClassWithSubReg(RC, Idx); +} + +const TargetRegisterClass * X86RegisterInfo::getMatchingSuperRegClass(const TargetRegisterClass *A, const TargetRegisterClass *B, unsigned SubIdx) const { diff --git a/lib/Target/X86/X86RegisterInfo.h b/lib/Target/X86/X86RegisterInfo.h index f2938141a5..7d39c68535 100644 --- a/lib/Target/X86/X86RegisterInfo.h +++ b/lib/Target/X86/X86RegisterInfo.h @@ -74,6 +74,9 @@ public: getMatchingSuperRegClass(const TargetRegisterClass *A, const TargetRegisterClass *B, unsigned Idx) const; + virtual const TargetRegisterClass * + getSubClassWithSubReg(const TargetRegisterClass *RC, unsigned Idx) const; + const TargetRegisterClass* getLargestLegalSuperClass(const TargetRegisterClass *RC) const; |