[Bug debug/48853] [4.7 Regression] Wrong DWARF codegen when Pmode != ptr_mode

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48853

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-05-03 16:04:42 UTC ---
Created attachment 24170
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24170
gcc47-pr48853.patch

This patch should fix var2.c on ia64-hpux - the patch will for memory addresses
only (i.e. when mem_mode is not VOIDmode) allow SYMBOL_REFs/LABEL_REFs/CONST of
larger mode than DWARF2_ADDR_SIZE, assuming it is Pmode and ptr_mode has
DWARF2_ADDR_SIZE.  It is a total mess though, because whether it is sign
extended or zero extended or something else isn't actually represented in the
debug info, the debug info consumer needs to know.