Simplify CCState's use of register aliases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121806 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/CallingConvLower.cpp b/lib/CodeGen/CallingConvLower.cpp
index cb3f9acdfe73ad90229774947edb35ef9507fc9e..2ad80b4d3a7599599f33ac2f4c4b877e44fdc75f 100644 (file)
--- a/lib/CodeGen/CallingConvLower.cpp
+++ b/lib/CodeGen/CallingConvLower.cpp
@@ -51,11 +51,9 @@ void CCState::HandleByVal(unsigned ValNo, MVT ValVT,
 
 /// MarkAllocated - Mark a register and all of its aliases as allocated.
 void CCState::MarkAllocated(unsigned Reg) {
-  UsedRegs[Reg/32] |= 1 << (Reg&31);
-  
-  if (const unsigned *RegAliases = TRI.getAliasSet(Reg))
-    for (; (Reg = *RegAliases); ++RegAliases)
-      UsedRegs[Reg/32] |= 1 << (Reg&31);
+  for (const unsigned *Alias = TRI.getOverlaps(Reg);
+       unsigned Reg = *Alias; ++Alias)
+    UsedRegs[Reg/32] |= 1 << (Reg&31);
 }
 
 /// AnalyzeFormalArguments - Analyze an array of argument values,