[llvm-commits] CVS: llvm/include/llvm/Target/TargetLowering.h

[Evan Cheng]

Changes in directory llvm/include/llvm/Target:

TargetLowering.h updated: 1.126 -> 1.127
---
Log message:

Target specific ifcvt code duplication limit.

---
Diffs of the changes:  (+21 -3)

 TargetLowering.h |   24 +++++++++++++++++++++---
 1 files changed, 21 insertions(+), 3 deletions(-)


Index: llvm/include/llvm/Target/TargetLowering.h
diff -u llvm/include/llvm/Target/TargetLowering.h:1.126 llvm/include/llvm/Target/TargetLowering.h:1.127
--- llvm/include/llvm/Target/TargetLowering.h:1.126	Thu May 17 19:00:30 2007
+++ llvm/include/llvm/Target/TargetLowering.h	Fri Jun  1 03:25:24 2007
@@ -440,6 +440,13 @@
     return IfCvtBlockSizeLimit;
   }
 
+  /// getIfCvtDupBlockLimit - returns the target specific size limit for a
+  /// block to be considered for duplication. Any block whose size is greater
+  /// should not be duplicated to facilitate its predication.
+  virtual unsigned getIfCvtDupBlockSizeLimit() const {
+    return IfCvtDupBlockSizeLimit;
+  }
+
   /// getPreIndexedAddressParts - returns true by value, base pointer and
   /// offset pointer and addressing mode by reference if the node's address
   /// can be legally represented as pre-indexed load / store address.
@@ -758,11 +765,18 @@
   }
 
   /// setIfCvtBlockSizeLimit - Set the target's if-conversion block size
-  /// (in number of instructions); default is 2.
+  /// limit (in number of instructions); default is 2.
   void setIfCvtBlockSizeLimit(unsigned Limit) {
     IfCvtBlockSizeLimit = Limit;
   }
   
+  /// setIfCvtDupBlockSizeLimit - Set the target's block size limit (in number
+  /// of instructions) to be considered for code duplication during
+  /// if-conversion; default is 2.
+  void setIfCvtDupBlockSizeLimit(unsigned Limit) {
+    IfCvtDupBlockSizeLimit = Limit;
+  }
+  
 public:
 
   //===--------------------------------------------------------------------===//
@@ -995,10 +1009,14 @@
   /// buffers
   unsigned JumpBufAlignment;
 
-  /// IfCvtBlockSizeLimit - The maximum allowed block size for if-conversion.
-  /// 
+  /// IfCvtBlockSizeLimit - The maximum allowed size for a block to be
+  /// if-converted.
   unsigned IfCvtBlockSizeLimit;
   
+  /// IfCvtDupBlockSizeLimit - The maximum allowed size for a block to be
+  /// duplicated during if-conversion.
+  unsigned IfCvtDupBlockSizeLimit;
+
   /// StackPointerRegisterToSaveRestore - If set to a physical register, this
   /// specifies the register that llvm.savestack/llvm.restorestack should save
   /// and restore.