From a92d62c15fa2bf84453489716323b0159912c55d Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Fri, 20 Apr 2007 21:11:22 +0000 Subject: [PATCH] Add sub-register sets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36277 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Target/MRegisterInfo.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/llvm/Target/MRegisterInfo.h b/include/llvm/Target/MRegisterInfo.h index 509485ab97d..585f4bc37bb 100644 --- a/include/llvm/Target/MRegisterInfo.h +++ b/include/llvm/Target/MRegisterInfo.h @@ -38,10 +38,13 @@ class Type; /// to a Zero terminated array of registers that this register aliases. This is /// needed for architectures like X86 which have AL alias AX alias EAX. /// Registers that this does not apply to simply should set this to null. +/// The SubRegs field is a zero terminated array of registers that are +/// sub-registers of the specific register, e.g. AL, AH are sub-registers of AX. /// struct TargetRegisterDesc { const char *Name; // Assembly language name for the register const unsigned *AliasSet; // Register Alias Set, described above + const unsigned *SubRegs; // Sub-register set, described above }; class TargetRegisterClass { -- 2.34.1