From 851bfff50f7251e4d00b5fffbb5e140544cc4a63 Mon Sep 17 00:00:00 2001 From: Owen Anderson Date: Tue, 19 Feb 2008 06:47:18 +0000 Subject: [PATCH] In addition to arguments passed to it, memcpy (and all other calls) can ModRef pointers that alias their arguments as well. This fixes PR2057. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47317 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Analysis/BasicAliasAnalysis.cpp | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/lib/Analysis/BasicAliasAnalysis.cpp b/lib/Analysis/BasicAliasAnalysis.cpp index 57d726df2db..200779f0e7a 100644 --- a/lib/Analysis/BasicAliasAnalysis.cpp +++ b/lib/Analysis/BasicAliasAnalysis.cpp @@ -263,7 +263,8 @@ BasicAliasAnalysis::getModRefInfo(CallSite CS, Value *P, unsigned Size) { for (CallSite::arg_iterator CI = CS.arg_begin(), CE = CS.arg_end(); CI != CE; ++CI) if (isa((*CI)->getType()) && - getUnderlyingObject(*CI) == P) + ( getUnderlyingObject(*CI) == P || + alias(cast(CI), ~0ULL, P, ~0ULL) != NoAlias) ) passedAsArg = true; if (!passedAsArg) -- 2.34.1