3 Commits

Author	SHA1	Message	Date
Michael Kuperstein	77ce9d3b1a	[X86] Always generate precise CFA adjustments. ... This removes the code path that generate "synchronous" (only correct at call site) CFA. We will probably want to re-introduce it once we are capable of emitting different .eh_frame and .debug_frame sections. Differential Revision: http://reviews.llvm.org/D14948 llvm-svn: 254874	2015-12-06 13:06:20 +00:00
Michael Kuperstein	73dc85293f	[X86] Generate .cfi_adjust_cfa_offset correctly when pushing arguments ... When push instructions are being used to pass function arguments on the stack, and either EH or debugging are enabled, we need to generate .cfi_adjust_cfa_offset directives appropriately. For (synch) EH, it is enough for the CFA offset to be correct at every call site, while for debugging we want to be correct after every push. Darwin does not support this well, so don't use pushes whenever it would be required. Differential Revision: http://reviews.llvm.org/D13767 llvm-svn: 251904	2015-11-03 08:17:25 +00:00
Michael Kuperstein	259f1508f0	[X86] Emit .cfi_escape GNU_ARGS_SIZE when adjusting the stack before calls ... When outgoing function arguments are passed using push instructions, and EH is enabled, we may need to indicate to the stack unwinder that the stack pointer was adjusted before the call. This should fix the exception handling issues in PR24792. Differential Revision: http://reviews.llvm.org/D13132 llvm-svn: 249522	2015-10-07 07:01:31 +00:00