[mips] Use --check-prefixes where appropriate. NFC.

llvm-svn: 273669
diff --git a/llvm/test/CodeGen/Mips/hf1_body.ll b/llvm/test/CodeGen/Mips/hf1_body.ll
index f6102bd..b646971 100644
--- a/llvm/test/CodeGen/Mips/hf1_body.ll
+++ b/llvm/test/CodeGen/Mips/hf1_body.ll
@@ -1,11 +1,11 @@
 ; RUN: llc -mtriple=mipsel-linux-gnu -march=mipsel -mattr=mips16 \
 ; RUN:     -relocation-model=pic -no-integrated-as < %s | \
-; RUN:     FileCheck %s -check-prefix=ALL -check-prefix=GAS
+; RUN:     FileCheck %s -check-prefixes=ALL,GAS
 
 ; The integrated assembler expands assembly macros before printing.
 ; RUN: llc -mtriple=mipsel-linux-gnu -march=mipsel -mattr=mips16 \
 ; RUN:     -relocation-model=pic < %s | \
-; RUN:     FileCheck %s -check-prefix=ALL -check-prefix=IAS
+; RUN:     FileCheck %s -check-prefixes=ALL,IAS
 
 @x = external global float