From 98a45667fb5158f71890f7b242768ad6096d43a5 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 12 Jan 2004 18:25:56 +0000
Subject: [PATCH] llvm::ConstantFoldInstruction

llvm-svn: 10787
---
 include/llvm/Transforms/Utils/Local.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/llvm/Transforms/Utils/Local.h b/include/llvm/Transforms/Utils/Local.h
index c786c965126..05db3b12552 100644
--- a/include/llvm/Transforms/Utils/Local.h
+++ b/include/llvm/Transforms/Utils/Local.h
@@ -38,6 +38,13 @@ bool doConstantPropagation(BasicBlock::iterator &I);
 ///
 bool ConstantFoldTerminator(BasicBlock *BB);
 
+/// ConstantFoldInstruction - Attempt to constant fold the specified
+/// instruction.  If successful, the constant result is returned, if not, null
+/// is returned.  Note that this function can only fail when attempting to fold
+/// instructions like loads and stores, which have no constant expression form.
+///
+Constant *ConstantFoldInstruction(Instruction *I);
+
 
 //===----------------------------------------------------------------------===//
 //  Local dead code elimination...