http://llvm.org/bugs/show_bug.cgi?id=4061
Summary: clang breaks strict-aliasing rules according to g++4.4
Product: new-bugs
Version: unspecified
Platform: PC
URL: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39891#c2
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
/home/edwin/llvm-svn/llvm/include/llvm/ADT/APInt.h: In member function âbool
clang::Expr::isIntegerConstantExpr(llvm::APSInt&, clang::ASTContext&,
clang::SourceLocation*, bool) constâ:
/home/edwin/llvm-svn/llvm/include/llvm/ADT/APInt.h:99: warning: dereferencing
pointer â<anonymous>â does break strict-aliasing rules
/home/edwin/llvm-svn/llvm/include/llvm/ADT/APInt.h:548: warning: dereferencing
pointer â<anonymous>â does break strict-aliasing rules
/home/edwin/llvm-svn/llvm/include/llvm/ADT/APInt.h:549: warning: dereferencing
pointer â<anonymous>â does break strict-aliasing rules
/home/edwin/llvm-svn/llvm/include/llvm/ADT/APSInt.h:38: warning: dereferencing
pointer â<anonymous>â does break strict-aliasing rules
Expr.cpp:1334: note: initialized from here
The location info for the warning is not accurate (it doesn't show the very
line causing the violation), but the aliasing violation is real:
return *(APSInt*)(void*)Data;
See URL for a possible solution.
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