Do not give token factor nodes outrageous weights

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19645 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelPattern.cpp b/lib/Target/X86/X86ISelPattern.cpp
index b7c9cfe9f2c2ccd578bd34bcb98b3cc817e55320..a75854e5592787c1953ec46fcf45f3c1523393c1 100644 (file)
--- a/lib/Target/X86/X86ISelPattern.cpp
+++ b/lib/Target/X86/X86ISelPattern.cpp
@@ -453,8 +453,11 @@ unsigned ISel::ComputeRegPressure(SDOperand O) {
         ++NumExtraMaxRegUsers;
       }
     }
-  
-    Result = MaxRegUse+NumExtraMaxRegUsers;
+
+    if (O.getOpcode() != ISD::TokenFactor)
+      Result = MaxRegUse+NumExtraMaxRegUsers;
+    else
+      Result = std::max(MaxRegUse-1, 1);
   }
 
   //std::cerr << " WEIGHT: " << Result << " ";  N->dump(); std::cerr << "\n";