[llvm-commits] CVS: llvm/lib/Transforms/ExprTypeConvert.cpp

[Chris Lattner]

Changes in directory llvm/lib/Transforms:

ExprTypeConvert.cpp updated: 1.89 -> 1.90

---
Log message:

Punt if we see gigantic PHI nodes.  This improves a huge interpreter loop 
testcase from 32.5s in -raise to take .3s


---
Diffs of the changes:  (+6 -0)

Index: llvm/lib/Transforms/ExprTypeConvert.cpp
diff -u llvm/lib/Transforms/ExprTypeConvert.cpp:1.89 llvm/lib/Transforms/ExprTypeConvert.cpp:1.90
--- llvm/lib/Transforms/ExprTypeConvert.cpp:1.89	Sun Feb  8 22:13:57 2004
+++ llvm/lib/Transforms/ExprTypeConvert.cpp	Tue Mar 16 13:52:53 2004
@@ -206,6 +206,9 @@
   }
   case Instruction::PHI: {
     PHINode *PN = cast<PHINode>(I);
+    // Be conservative if we find a giant PHI node.
+    if (PN->getNumIncomingValues() > 32) return false;
+
     for (unsigned i = 0; i < PN->getNumIncomingValues(); ++i)
       if (!ExpressionConvertibleToType(PN->getIncomingValue(i), Ty, CTMap, TD))
         return false;
@@ -815,6 +818,9 @@
 
   case Instruction::PHI: {
     PHINode *PN = cast<PHINode>(I);
+    // Be conservative if we find a giant PHI node.
+    if (PN->getNumIncomingValues() > 32) return false;
+
     for (unsigned i = 0; i < PN->getNumIncomingValues(); ++i)
       if (!ExpressionConvertibleToType(PN->getIncomingValue(i), Ty, CTMap, TD))
         return false;