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4 Commits

Author SHA1 Message Date
Rafael Espindola 310e4b592f Use the vanilla func_end symbol for .size. 
No need to create yet another temp symbol.

llvm-svn: 231198
 2015-03-04 01:35:23 +00:00
Rafael Espindola 9dd2d5810f Add back tests for empty function in SPARC and PowerPC. 
llvm-svn: 217834
 2014-09-15 22:11:07 +00:00
Rafael Espindola 6865d6f08a Fix a lot of confusion around inserting nops on empty functions. 
On MachO, and MachO only, we cannot have a truly empty function since that
breaks the linker logic for atomizing the section.

When we are emitting a frame pointer, the presence of an unreachable will
create a cfi instruction pointing past the last instruction. This is perfectly
fine. The FDE information encodes the pc range it applies to. If some tool
cannot handle this, we should explicitly say which bug we are working around
and only work around it when it is actually relevant (not for ELF for example).

Given the unreachable we could omit the .cfi_def_cfa_register, but then
again, we could also omit the entire function prologue if we wanted to.

llvm-svn: 217801
 2014-09-15 18:32:58 +00:00
Brad Smith 2ce0d91bde Provide an implementation of getNoopForMachoTarget for SPARC. 
llvm-svn: 217611
 2014-09-11 17:40:51 +00:00