except.c (can_throw): See through a SEQUENCE.

        * except.c (can_throw): See through a SEQUENCE.
        (nothrow_function_p): New fn.
        * except.h: Declare it.
        * function.c (current_function_nothrow): New var.
        (prepare_function_start): Initialize it.
        * output.h: Declare it.
        * toplev.c (rest_of_compilation): Set it.
        * dwarf2out.c (dwarf2out_begin_prologue): Use it.

From-SVN: r32449

1 files changed, 6 insertions, 0 deletions

diff --git a/gcc/function.c b/gcc/function.c
index 093a0d8..1ffb821 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -107,6 +107,11 @@ Boston, MA 02111-1307, USA.  */
    compiler passes. */
 int current_function_is_leaf;
 
+/* Nonzero if function being compiled doesn't contain any instructions
+   that can throw an exception.  This is set prior to final.  */
+
+int current_function_nothrow;
+
 /* Nonzero if function being compiled doesn't modify the stack pointer
    (ignoring the prologue and epilogue).  This is only valid after
    life_analysis has run. */
@@ -5760,6 +5765,7 @@ prepare_function_start ()
   current_function_calls_alloca = 0;
   current_function_contains_functions = 0;
   current_function_is_leaf = 0;
+  current_function_nothrow = 0;
   current_function_sp_is_unchanging = 0;
   current_function_uses_only_leaf_regs = 0;
   current_function_has_computed_jump = 0;