Vendor import of llvm trunk r130700:

http://llvm.org/svn/llvm-project/llvm/trunk@130700

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/CodeGen/Passes.cpp b/lib/CodeGen/Passes.cpp
index 3489db2..315aedd 100644
--- a/lib/CodeGen/Passes.cpp
+++ b/lib/CodeGen/Passes.cpp
@@ -55,6 +55,11 @@ FunctionPass *llvm::createRegisterAllocator(CodeGenOpt::Level OptLevel) {
     RegisterRegAlloc::setDefault(RegAlloc);
   }
 
+  // This forces linking of the linear scan register allocator,
+  // so -regalloc=linearscan still works in clang.
+  if (Ctor == createLinearScanRegisterAllocator)
+    return createLinearScanRegisterAllocator();
+
   if (Ctor != createDefaultRegisterAllocator)
     return Ctor();
 
@@ -63,6 +68,6 @@ FunctionPass *llvm::createRegisterAllocator(CodeGenOpt::Level OptLevel) {
   case CodeGenOpt::None:
     return createFastRegisterAllocator();
   default:
-    return createLinearScanRegisterAllocator();
+    return createGreedyRegisterAllocator();
   }
 }