[mips] [IAS] Add support for the DLA pseudo-instruction and fix problems with DLI

Summary: It is the same as LA, except that it can also load 64-bit addresses and it only works on 64-bit MIPS architectures.

Reviewers: tomatabacu, seanbruno, vkalintiris

Subscribers: brooks, seanbruno, emaste, llvm-commits

Differential Revision: http://reviews.llvm.org/D9524

llvm-svn: 245208

2 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp
index 14c5a34602a..bd1feb81d86 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp
@@ -107,6 +107,10 @@ unsigned MipsABIInfo::GetNullPtr() const {
   return ArePtrs64bit() ? Mips::ZERO_64 : Mips::ZERO;
 }
 
+unsigned MipsABIInfo::GetZeroReg() const {
+  return AreGprs64bit() ? Mips::ZERO_64 : Mips::ZERO;
+}
+
 unsigned MipsABIInfo::GetPtrAdduOp() const {
   return ArePtrs64bit() ? Mips::DADDu : Mips::ADDu;
 }
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.h b/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.h
index 926da905cb6..cb3df44c800 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.h
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.h
@@ -67,10 +67,12 @@ public:
   unsigned GetFramePtr() const;
   unsigned GetBasePtr() const;
   unsigned GetNullPtr() const;
+  unsigned GetZeroReg() const;
   unsigned GetPtrAdduOp() const;
   unsigned GetPtrAddiuOp() const;
   unsigned GetGPRMoveOp() const;
   inline bool ArePtrs64bit() const { return IsN64(); }
+  inline bool AreGprs64bit() const { return IsN32() || IsN64(); }
 
   unsigned GetEhDataReg(unsigned I) const;
 };