Hi, This fails on Visual C++ 2013 update 3, 32 bit:
-- Testing: 1 tests, 1 threads -- FAIL: Clang :: Sema/builtin-object-size.c (1 of 1) ******************** TEST 'Clang :: Sema/builtin-object-size.c' FAILED ******************** Script: -- C:/llvm-clean/msvc/RelWithDebInfo/bin/clang.EXE -cc1 -internal-isystem C:\llvm-clean\msvc\RelWithDebInfo\bin\..\lib\clang\3.6.0\include -fsyntax-only -verify C:\llvm-clean\tools\clang\test\Sema\builtin-object-size.c C:/llvm-clean/msvc/RelWithDebInfo/bin/clang.EXE -cc1 -internal-isystem C:\llvm-clean\msvc\RelWithDebInfo\bin\..\lib\clang\3.6.0\include -fsyntax-only -triple x86_64-apple-darwin9 -verify C:\llvm-clean\tools\clang\test\Sema\builtin-object-size.c -- Exit Code: 1 Command Output (stdout): -- Command 0: "C:/llvm-clean/msvc/RelWithDebInfo/bin/clang.EXE" "-cc1" "-internal-isystem" "C:\llvm-clean\msvc\RelWithDebInfo\bin\..\lib\clang\3.6.0\include" "-fsyntax-only" "-verify" "C:\llvm-clean\tools\clang\test\Sema\builtin-object-size.c" Command 0 Result: 1 Command 0 Output: Command 0 Stderr: error: 'warning' diagnostics seen but not expected: File C:\llvm-clean\tools\clang\test\Sema\builtin-object-size.c Line 32: incompatible redeclaration of library function 'memcpy' error: 'note' diagnostics seen but not expected: File C:\llvm-clean\tools\clang\test\Sema\builtin-object-size.c Line 32: 'memcpy' is a builtin with type 'void *(void *, const void *, unsigned int)' 2 errors generated. Yaron 2014-09-22 20:12 GMT+03:00 Fariborz Jahanian <[email protected]>: > Author: fjahanian > Date: Mon Sep 22 12:11:59 2014 > New Revision: 218258 > > URL: http://llvm.org/viewvc/llvm-project?rev=218258&view=rev > Log: > Fix evatuated value of __builtin_object_size according to its > 'type' argument when it cannot be determined which objects ptr > points to at compile time. rdar://18334276 > > Modified: > cfe/trunk/lib/AST/ExprConstant.cpp > cfe/trunk/test/Sema/builtin-object-size.c > > Modified: cfe/trunk/lib/AST/ExprConstant.cpp > URL: > http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/ExprConstant.cpp?rev=218258&r1=218257&r2=218258&view=diff > > ============================================================================== > --- cfe/trunk/lib/AST/ExprConstant.cpp (original) > +++ cfe/trunk/lib/AST/ExprConstant.cpp Mon Sep 22 12:11:59 2014 > @@ -6052,8 +6052,20 @@ bool IntExprEvaluator::TryEvaluateBuilti > return false; > } > > - // If we can prove the base is null, lower to zero now. > - if (!Base.getLValueBase()) return Success(0, E); > + if (!Base.getLValueBase()) { > + // It is not possible to determine which objects ptr points to at > compile time, > + // __builtin_object_size should return (size_t) -1 for type 0 or 1 > + // and (size_t) 0 for type 2 or 3. > + llvm::APSInt TypeIntVaue; > + const Expr *ExprType = E->getArg(1); > + if (!ExprType->EvaluateAsInt(TypeIntVaue, Info.Ctx)) > + return false; > + if (TypeIntVaue == 0 || TypeIntVaue == 1) > + return Success(-1, E); > + if (TypeIntVaue == 2 || TypeIntVaue == 3) > + return Success(0, E); > + return Error(E); > + } > > QualType T = GetObjectType(Base.getLValueBase()); > if (T.isNull() || > > Modified: cfe/trunk/test/Sema/builtin-object-size.c > URL: > http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/builtin-object-size.c?rev=218258&r1=218257&r2=218258&view=diff > > ============================================================================== > --- cfe/trunk/test/Sema/builtin-object-size.c (original) > +++ cfe/trunk/test/Sema/builtin-object-size.c Mon Sep 22 12:11:59 2014 > @@ -26,3 +26,20 @@ void f4(const char *fmt, ...) { > __builtin___vsnprintf_chk (0, 42, 0, 11, fmt, args); // expected-warning > {{'__builtin___vsnprintf_chk' will always overflow destination buffer}} > } > > +// rdar://18334276 > +typedef unsigned long size_t; > +void * memcset(void *restrict dst, int src, size_t n); > +void * memcpy(void *restrict dst, const void *restrict src, size_t n); > + > +#define memset(dest, src, len) __builtin___memset_chk(dest, src, len, > __builtin_object_size(dest, 0)) > +#define memcpy(dest, src, len) __builtin___memcpy_chk(dest, src, len, > __builtin_object_size(dest, 0)) > +#define memcpy1(dest, src, len) __builtin___memcpy_chk(dest, src, len, > __builtin_object_size(dest, 4)) > +#define NULL ((void *)0) > + > +void f5(void) > +{ > + char buf[10]; > + memset((void *)0x100000000ULL, 0, 0x1000); > + memcpy((char *)NULL + 0x10000, buf, 0x10); > + memcpy1((char *)NULL + 0x10000, buf, 0x10); // expected-error > {{argument should be a value from 0 to 3}} > +} > > > _______________________________________________ > cfe-commits mailing list > [email protected] > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits >
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