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3 Commits

Author SHA1 Message Date
Rafael Espindola
33f7d7f9fa Use the dwarf->llvm mapping to print register names in the cfi 
directives.

Fixes PR9826.

llvm-svn: 132317
 2011-05-30 20:20:15 +00:00
Rafael Espindola
ab39b8319b Don't produce a __debug_frame. 
I tested both gdb on a bootstrapped clang and and the gdb testsuite on OS X (snow leopard)
and both are happy using __eh_frame.

llvm-svn: 130937
 2011-05-05 18:43:39 +00:00
Bill Wendling
85d6ed81b7 Consider this function: 
void foo() { __builtin_unreachable(); }

It will output the following on Darwin X86:

_func1:
Leh_func_begin0:
        pushq %rbp
Ltmp0:
        movq %rsp, %rbp
Ltmp1:
Leh_func_end0:

This prolog adds a new Call Frame Information (CFI) row to the FDE with an
address that is not within the address range of the code it describes -- part is
equal to the end of the function -- and therefore results in an invalid EH
frame. If we emit a nop in this situation, then the CFI row is now within the
address range.

llvm-svn: 108568
 2010-07-16 22:51:10 +00:00