R600/SI: Return the correct index for VGPRs in getHWRegIndex()

The register index is stored in the low 8-bits of the encoding.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205186 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/R600/SIRegisterInfo.cpp b/lib/Target/R600/SIRegisterInfo.cpp
index a784fa42647ba96b6f7fb4a29d1b1811d6513d28..6cef1954935d27a8e5c8d6d5b0f2401ca038adbf 100644 (file)
--- a/lib/Target/R600/SIRegisterInfo.cpp
+++ b/lib/Target/R600/SIRegisterInfo.cpp
@@ -56,7 +56,7 @@ const TargetRegisterClass * SIRegisterInfo::getCFGStructurizerRegClass(
 }
 
 unsigned SIRegisterInfo::getHWRegIndex(unsigned Reg) const {
-  return getEncodingValue(Reg);
+  return getEncodingValue(Reg) & 0xff;
 }
 
 const TargetRegisterClass *SIRegisterInfo::getPhysRegClass(unsigned Reg) const {