Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion.

This was done with the following sed invocation to catch label lines demarking function boundaries:
    sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll
which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct.

llvm-svn: 186258
diff --git a/llvm/test/CodeGen/X86/tailcall-disable.ll b/llvm/test/CodeGen/X86/tailcall-disable.ll
index b628f5e..1fd2d72 100644
--- a/llvm/test/CodeGen/X86/tailcall-disable.ll
+++ b/llvm/test/CodeGen/X86/tailcall-disable.ll
@@ -15,12 +15,12 @@
   ret i32 %call
 }
 
-; CALL: test1:
+; CALL-LABEL: test1:
 ; CALL-NOT: ret
 ; CALL: callq helper
 ; CALL: ret
 
-; JMP: test1:
+; JMP-LABEL: test1:
 ; JMP-NOT: ret
 ; JMP: jmp helper # TAILCALL
 
@@ -30,11 +30,11 @@
   ret i32 %call
 }
 
-; CALL: test2:
+; CALL-LABEL: test2:
 ; CALL-NOT: ret
 ; CALL: callq test2
 ; CALL: ret
 
-; JMP: test2:
+; JMP-LABEL: test2:
 ; JMP-NOT: ret
 ; JMP: jmp test2 # TAILCALL