diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.h b/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.h index 1f70047..3c9f0cb 100644 --- a/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.h +++ b/lib/Target/SystemZ/MCTargetDesc/SystemZMCTargetDesc.h @@ -36,8 +36,11 @@ namespace SystemZMC { const int64_t CFAOffsetFromInitialSP = CallFrameSize; // Maps of asm register numbers to LLVM register numbers, with 0 indicating - // an invalid register. We don't use the register classes directly because - // they specify the allocation order. + // an invalid register. In principle we could use 32-bit and 64-bit register + // classes directly, provided that we relegated the GPR allocation order + // in SystemZRegisterInfo.td to an AltOrder and left the default order + // as %r0-%r15. It seems better to provide the same interface for + // all classes though. extern const unsigned GR32Regs[16]; extern const unsigned GR64Regs[16]; extern const unsigned GR128Regs[16]; |