4 Commits

Author	SHA1	Message	Date
Rafael Espindola	41302723de	Remove unnecessary dependency on section and string positions. ... llvm-svn: 251964	2015-11-03 19:24:17 +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
Frederic Riss	263b772bda	[X86] Disable X86CallFrameOptimization on Darwin in presence of EH ... We emit 1 compact unwind encoding per function, and this can’t represent the varying stack pointer that will be generated by X86CallFrameOptimization. Disable the optimization on Darwin. (It might be possible to split the function into multiple ranges and emit 1 compact unwind info per range. The compact unwind emission code isn’t ready for that and this kind of info certainly isn’t tested/used anywhere. It might be worth exploring this path if we want to get the space savings at some point though) llvm-svn: 249694	2015-10-08 15:45:08 +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