Revert "[mips] Promote the result of SETCC nodes to GPR width."

This reverts commit r262316.

It seems that my change breaks an out-of-tree chromium buildbot, so
I'm reverting this in order to investigate the situation further.

llvm-svn: 262387
diff --git a/llvm/test/CodeGen/Mips/countleading.ll b/llvm/test/CodeGen/Mips/countleading.ll
index 90a459d..b7aad04 100644
--- a/llvm/test/CodeGen/Mips/countleading.ll
+++ b/llvm/test/CodeGen/Mips/countleading.ll
@@ -4,7 +4,7 @@
 ; RUN: llc -march=mips64el -mcpu=mips4    < %s | FileCheck -check-prefix=ALL -check-prefix=MIPS4 %s
 ; RUN: llc -march=mips64el -mcpu=mips64   < %s | FileCheck -check-prefix=ALL -check-prefix=MIPS64-GT-R1 %s
 ; RUN: llc -march=mips64el -mcpu=mips64r2 < %s | FileCheck -check-prefix=ALL -check-prefix=MIPS64-GT-R1 %s
-; RUN: llc -march=mips64el -mcpu=mips64r6 < %s | FileCheck -check-prefix=ALL -check-prefix=MIPS64-GT-R1 %s
+; R!N: llc -march=mips64el -mcpu=mips64r6 < %s | FileCheck -check-prefix=ALL -check-prefix=MIPS64-GT-R1 %s
 
 ; Prefixes:
 ;   ALL      - All