Chandler Carruth 4c6fdca035 Implement a warning for known shift overflows on constant shift ... expressions. Consider the code: int64_t i = 10 << 30; This compiles fine, but most developers expect it to produce the value for 10 gigs, not -2 gigs. This is actually undefined behavior because the LHS is a signed integer type. The warning is currently gated behind -Wshift-overflow. There is a special case where only the sign bit is overridden that gets a custom error message and is by default ignored. This case is much less likely to cause observed buggy behavior, it's just undefined behavior according to the spec. This warning can be enabled with -Wshift-sign-overflow. Original patch by Oleg Slezberg, with style tweaks and some correctness fixes by me. llvm-svn: 126342		2011-02-23 23:34:11 +00:00
clang	Implement a warning for known shift overflows on constant shift	2011-02-23 23:34:11 +00:00
compiler-rt	clang_darwin: We don't need clear_cache for use with Clang on ARM/Darwin.	2011-01-21 18:23:47 +00:00
debuginfo-tests	test case for r125249.	2011-02-10 00:41:14 +00:00
libcxx	Jean-Daniel Dupas fixes install directions	2011-02-22 14:18:34 +00:00
lldb	Add emulation for "ADR" operations. Add a ThumbImm8Scaled() convenience function	2011-02-23 21:24:25 +00:00
llvm	Use DW_FORM_data2 for DW_AT_language and let users use DW_LANG_lo_user=0x8000 to DW_LANG_hi_user=0xffff range.	2011-02-23 22:37:04 +00:00