[mips] Add backend support for Mips32r[35] and Mips64r[35].

Summary:
These ISA's didn't add any instructions so they are almost identical to
Mips32r2 and Mips64r2. Even the ELF e_flags are the same, However the ISA
revision in .MIPS.abiflags is 3 or 5 respectively instead of 2.

Reviewers: vmedic

Reviewed By: vmedic

Subscribers: tomatabacu, llvm-commits, atanasyan

Differential Revision: http://reviews.llvm.org/D7381

llvm-svn: 229695
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp
index 6e2849f..faf9741 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsABIInfo.cpp
@@ -75,6 +75,8 @@
       .Case("mips2", MipsABIInfo::O32())
       .Case("mips32", MipsABIInfo::O32())
       .Case("mips32r2", MipsABIInfo::O32())
+      .Case("mips32r3", MipsABIInfo::O32())
+      .Case("mips32r5", MipsABIInfo::O32())
       .Case("mips32r6", MipsABIInfo::O32())
       .Case("mips16", MipsABIInfo::O32())
       .Case("mips3", MipsABIInfo::N64())
@@ -82,6 +84,8 @@
       .Case("mips5", MipsABIInfo::N64())
       .Case("mips64", MipsABIInfo::N64())
       .Case("mips64r2", MipsABIInfo::N64())
+      .Case("mips64r3", MipsABIInfo::N64())
+      .Case("mips64r5", MipsABIInfo::N64())
       .Case("mips64r6", MipsABIInfo::N64())
       .Case("octeon", MipsABIInfo::N64())
       .Default(MipsABIInfo::Unknown());