diff options
Diffstat (limited to 'gcc/config/alpha/alpha.c')
| -rw-r--r-- | gcc/config/alpha/alpha.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/config/alpha/alpha.c b/gcc/config/alpha/alpha.c index 9f5dae29054..e13c5f9fc57 100644 --- a/gcc/config/alpha/alpha.c +++ b/gcc/config/alpha/alpha.c @@ -26,6 +26,8 @@ along with GCC; see the file COPYING3. If not see #include "target.h" #include "rtl.h" #include "tree.h" +#include "stringpool.h" +#include "attribs.h" #include "memmodel.h" #include "gimple.h" #include "df.h" @@ -9456,6 +9458,25 @@ And in the noreturn case: if (current_function_has_exception_handlers ()) alpha_pad_function_end (); + + /* CALL_PAL that implements trap insn, updates program counter to point + after the insn. In case trap is the last insn in the function, + emit NOP to guarantee that PC remains inside function boundaries. + This workaround is needed to get reliable backtraces. */ + + rtx_insn *insn = prev_active_insn (get_last_insn ()); + + if (insn && NONJUMP_INSN_P (insn)) + { + rtx pat = PATTERN (insn); + if (GET_CODE (pat) == PARALLEL) + { + rtx vec = XVECEXP (pat, 0, 0); + if (GET_CODE (vec) == TRAP_IF + && XEXP (vec, 0) == const1_rtx) + emit_insn_after (gen_unop (), insn); + } + } } static void |