Move additional register names to their own lookup, separate from
register aliases. Fixes unnecessary renames of clobbers.
Fixes part of rdar://9425559
llvm-svn: 133485
diff --git a/clang/lib/Basic/TargetInfo.cpp b/clang/lib/Basic/TargetInfo.cpp
index dcf0cb4..2d4c4a9 100644
--- a/clang/lib/Basic/TargetInfo.cpp
+++ b/clang/lib/Basic/TargetInfo.cpp
@@ -212,6 +212,20 @@
return true;
}
+ // Check any additional names that we have.
+ const AddlRegName *AddlNames;
+ unsigned NumAddlNames;
+ getGCCAddlRegNames(AddlNames, NumAddlNames);
+ for (unsigned i = 0; i < NumAddlNames; i++)
+ for (unsigned j = 0; j < llvm::array_lengthof(AddlNames[i].Names); j++) {
+ if (!AddlNames[i].Names[j])
+ break;
+ // Make sure the register that the additional name is for is within
+ // the bounds of the register names from above.
+ if (AddlNames[i].Names[j] == Name && AddlNames[i].RegNum < NumNames)
+ return true;
+ }
+
// Now check aliases.
const GCCRegAlias *Aliases;
unsigned NumAliases;
@@ -251,6 +265,20 @@
}
}
+ // Check any additional names that we have.
+ const AddlRegName *AddlNames;
+ unsigned NumAddlNames;
+ getGCCAddlRegNames(AddlNames, NumAddlNames);
+ for (unsigned i = 0; i < NumAddlNames; i++)
+ for (unsigned j = 0; j < llvm::array_lengthof(AddlNames[i].Names); j++) {
+ if (!AddlNames[i].Names[j])
+ break;
+ // Make sure the register that the additional name is for is within
+ // the bounds of the register names from above.
+ if (AddlNames[i].Names[j] == Name && AddlNames[i].RegNum < NumNames)
+ return Name;
+ }
+
// Now check aliases.
const GCCRegAlias *Aliases;
unsigned NumAliases;