[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/test/CodeGen/Mips/llvm-ir/add.ll b/llvm/test/CodeGen/Mips/llvm-ir/add.ll
index 83774ed..6cccc7d 100644
--- a/llvm/test/CodeGen/Mips/llvm-ir/add.ll
+++ b/llvm/test/CodeGen/Mips/llvm-ir/add.ll
@@ -4,6 +4,10 @@
 ; RUN:    -check-prefix=ALL -check-prefix=NOT-R2-R6 -check-prefix=GP32
 ; RUN: llc < %s -march=mips -mcpu=mips32r2 | FileCheck %s \
 ; RUN:    -check-prefix=ALL -check-prefix=R2-R6 -check-prefix=GP32
+; RUN: llc < %s -march=mips -mcpu=mips32r3 | FileCheck %s \
+; RUN:    -check-prefix=ALL -check-prefix=R2-R6 -check-prefix=GP32
+; RUN: llc < %s -march=mips -mcpu=mips32r5 | FileCheck %s \
+; RUN:    -check-prefix=ALL -check-prefix=R2-R6 -check-prefix=GP32
 ; RUN: llc < %s -march=mips -mcpu=mips32r6 | FileCheck %s \
 ; RUN:    -check-prefix=ALL -check-prefix=R2-R6 -check-prefix=GP32
 ; RUN: llc < %s -march=mips64 -mcpu=mips3 | FileCheck %s \
@@ -14,6 +18,10 @@
 ; RUN:    -check-prefix=ALL -check-prefix=NOT-R2-R6 -check-prefix=GP64
 ; RUN: llc < %s -march=mips64 -mcpu=mips64r2 | FileCheck %s \
 ; RUN:    -check-prefix=ALL -check-prefix=R2-R6 -check-prefix=GP64
+; RUN: llc < %s -march=mips64 -mcpu=mips64r3 | FileCheck %s \
+; RUN:    -check-prefix=ALL -check-prefix=R2-R6 -check-prefix=GP64
+; RUN: llc < %s -march=mips64 -mcpu=mips64r5 | FileCheck %s \
+; RUN:    -check-prefix=ALL -check-prefix=R2-R6 -check-prefix=GP64
 ; RUN: llc < %s -march=mips64 -mcpu=mips64r6 | FileCheck %s \
 ; RUN:    -check-prefix=ALL -check-prefix=R2-R6 -check-prefix=GP64