PR tree-optimization/16632

[pf3gnuchains/gcc-fork.git] / gcc / unwind-dw2.c

diff --git a/gcc/unwind-dw2.c b/gcc/unwind-dw2.c
index eb36e20..baa4481 100644 (file)
--- a/gcc/unwind-dw2.c
+++ b/gcc/unwind-dw2.c
@@ -125,6 +125,11 @@ _Unwind_GetGR (struct _Unwind_Context *context, int index)
   int size;
   void *ptr;
 
+#ifdef DWARF_ZERO_REG
+  if (index == DWARF_ZERO_REG)
+    return 0;
+#endif
+
   index = DWARF_REG_TO_UNWIND_COLUMN (index);
   if (index >= (int) sizeof(dwarf_reg_size_table))
     abort ();
@@ -840,7 +845,7 @@ execute_cfa_program (const unsigned char *insn_ptr,
                unused_rs = unused_rs->prev;
              }
            else
-             new_rs = __builtin_alloca (sizeof (struct frame_state_reg_info));
+             new_rs = alloca (sizeof (struct frame_state_reg_info));
 
            *new_rs = fs->regs;
            fs->regs.prev = new_rs;