[mips] Implement 'la' macro in PIC mode for O32.

Summary:
N32 support will follow in a later patch since the symbol version of 'la'
incorrectly believes N32 to have 64-bit pointers and rejects it early.

This fixes the three incorrectly expanded 'la' macros found in bionic.

Reviewers: sdardis

Subscribers: dsanders, llvm-commits, sdardis

Differential Revision: http://reviews.llvm.org/D20820

llvm-svn: 271644

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp
index 5fda05a5b4e..97b24ede0cd 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp
@@ -102,6 +102,10 @@ unsigned MipsABIInfo::GetBasePtr() const {
   return ArePtrs64bit() ? Mips::S7_64 : Mips::S7;
 }
 
+unsigned MipsABIInfo::GetGlobalPtr() const {
+  return ArePtrs64bit() ? Mips::GP_64 : Mips::GP;
+}
+
 unsigned MipsABIInfo::GetNullPtr() const {
   return ArePtrs64bit() ? Mips::ZERO_64 : Mips::ZERO;
 }