Chris Lattner c7d7e0cbe0 make simplifycfg insert an llvm.trap before the 'unreachable' it introduces ... when it detects undefined behavior. llvm.trap generally codegens into some thing really small (e.g. a 2 byte ud2 instruction on x86) and debugging this sort of thing is "nontrivial". For example, we now compile: void foo() { *(int*)0 = 42; } into: _foo: pushl %ebp movl %esp, %ebp ud2 Some may even claim that this is a security hole, though that seems dubious to me. This addresses rdar://7958343 - Optimizing away null dereference potentially allows arbitrary code execution git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103356 91177308-0d34-0410-b5e6-96231b3b80d8		2010-05-08 22:15:59 +00:00
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Hello
InstCombine	Teach instcombine to transform a bitcast/(zext|trunc)/bitcast sequence	2010-05-08 21:50:26 +00:00
Instrumentation	Revert 101465, it broke internal OpenGL testing.	2010-04-16 23:37:20 +00:00
IPO	revert r102831. We already delete dead readonly calls in	2010-05-01 17:19:38 +00:00
Scalar	make simplifycfg insert an llvm.trap before the 'unreachable' it introduces	2010-05-08 22:15:59 +00:00
Utils	Wrap const MDNode * inside DIDescriptor.	2010-05-07 20:54:48 +00:00
Makefile	Revert r100896 and around - this breaks the only mingw32 buildbot we have.	2010-04-15 19:51:42 +00:00