Move additional register names to their own lookup, separate from
register aliases. Fixes unnecessary renames of clobbers.

Fixes part of rdar://9425559


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133485 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/asm-inout.c b/test/CodeGen/asm-inout.c
index 29142f7..ce524fe 100644
--- a/test/CodeGen/asm-inout.c
+++ b/test/CodeGen/asm-inout.c
@@ -21,7 +21,7 @@
 // PR7338
 void test3(int *vout, int vin)
 {
-  // CHECK: call void asm "opr $0,$1", "=*r|m|r,r|m|r,~{di},~{dirflag},~{fpsr},~{flags}"
+  // CHECK: call void asm "opr $0,$1", "=*r|m|r,r|m|r,~{edi},~{dirflag},~{fpsr},~{flags}"
 asm(
 		"opr %[vout],%[vin]"
 		: [vout] "=r,=m,=r" (*vout)
@@ -37,4 +37,3 @@
   return (int)oldval;
 // CHECK: call i8 asm "frob $0", "=r,0{{.*}}"(i8 -1)
 }
-