From 88e76757deb4872fc5d0db8592019fa73bfecfe7 Mon Sep 17 00:00:00 2001 From: Duncan Sands Date: Thu, 1 Jan 2009 20:45:19 +0000 Subject: [PATCH] Mention that this pass does escape analysis in the leading comments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61548 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/IPO/FunctionAttrs.cpp | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/lib/Transforms/IPO/FunctionAttrs.cpp b/lib/Transforms/IPO/FunctionAttrs.cpp index 52be0c906e1..fcdede2fa35 100644 --- a/lib/Transforms/IPO/FunctionAttrs.cpp +++ b/lib/Transforms/IPO/FunctionAttrs.cpp @@ -9,8 +9,10 @@ // // This file implements a simple interprocedural pass which walks the // call-graph, looking for functions which do not access or only read -// non-local memory, and marking them readnone/readonly. It implements -// this as a bottom-up traversal of the call-graph. +// non-local memory, and marking them readnone/readonly. It addition, +// it deduces which function arguments (of pointer type) do not escape, +// and marks them nocapture. It implements this as a bottom-up traversal +// of the call-graph. // //===----------------------------------------------------------------------===// @@ -44,7 +46,7 @@ namespace { // AddNoCaptureAttrs - Deduce nocapture attributes for the SCC. bool AddNoCaptureAttrs(const std::vector &SCC); - // isCaptured - Returns whether this pointer value is captured. + // isCaptured - Returns true if this pointer value escapes. bool isCaptured(Function &F, Value *V); virtual void getAnalysisUsage(AnalysisUsage &AU) const {