[llvm-commits] CVS: llvm/include/llvm/Transforms/Scalar.h

[Chris Lattner]

Changes in directory llvm/include/llvm/Transforms:

Scalar.h updated: 1.13 -> 1.14

---
Log message:

Expose isCriticalEdge & SplitCriticalEdge methods from crit-edges pass


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Diffs of the changes:

Index: llvm/include/llvm/Transforms/Scalar.h
diff -u llvm/include/llvm/Transforms/Scalar.h:1.13 llvm/include/llvm/Transforms/Scalar.h:1.14
--- llvm/include/llvm/Transforms/Scalar.h:1.13	Thu Sep 26 11:17:33 2002
+++ llvm/include/llvm/Transforms/Scalar.h	Tue Oct  8 16:06:24 2002
@@ -11,6 +11,7 @@
 class Pass;
 class GetElementPtrInst;
 class PassInfo;
+class TerminatorInst;
 
 //===----------------------------------------------------------------------===//
 //
@@ -188,6 +189,21 @@
 Pass *createBreakCriticalEdgesPass();
 extern const PassInfo *BreakCriticalEdgesID;
 
+// The BreakCriticalEdges pass also exposes some low-level functionality that
+// may be used by other passes.
+
+/// isCriticalEdge - Return true if the specified edge is a critical edge.
+/// Critical edges are edges from a block with multiple successors to a block
+/// with multiple predecessors.
+///
+bool isCriticalEdge(const TerminatorInst *TI, unsigned SuccNum);
+
+/// SplitCriticalEdge - Insert a new node node to split the critical edge.  This
+/// will update DominatorSet, ImmediateDominator and DominatorTree information
+/// if a pass is specified, thus calling this pass will not invalidate these
+/// analyses.
+///
+void SplitCriticalEdge(TerminatorInst *TI, unsigned SuccNum, Pass *P = 0);
 
 //===----------------------------------------------------------------------===//
 //