(propagate_block): CALL_INSNs don't kill fixed regs.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@11646 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/flow.c b/gcc/flow.c
index 7811178..a792e7f 100644 (file)
--- a/gcc/flow.c
+++ b/gcc/flow.c
@@ -1622,12 +1622,13 @@ propagate_block (old, first, last, final, significant, bnum)
                                      final, insn);
 
                  /* Each call clobbers all call-clobbered regs that are not
-                    global.  Note that the function-value reg is a
+                    global or fixed.  Note that the function-value reg is a
                     call-clobbered reg, and mark_set_regs has already had
                     a chance to handle it.  */
 
                  for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
-                   if (call_used_regs[i] && ! global_regs[i])
+                   if (call_used_regs[i] && ! global_regs[i]
+                       && ! fixed_regs[i])
                      dead[i / REGSET_ELT_BITS]
                        |= ((REGSET_ELT_TYPE) 1 << (i % REGSET_ELT_BITS));