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flow.c (life_analysis): Do not conside the stack pointer live at the end of a function if...

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* flow.c (life_analysis): Do not conside the stack pointer live at
        the end of a function if the fucntio ncalls alloca.
        (mark_used_regs): Similarly.

From-SVN: r17839
This commit is contained in:
Jeffrey A Law 1998-02-11 00:18:51 +00:00 committed by Jeff Law
parent c29c4e238e
commit 0200b5ed0a
2 changed files with 12 additions and 2 deletions

6
gcc/ChangeLog

@ -1,3 +1,9 @@
Wed Feb 11 01:17:39 1998 Jeffrey A Law (law@cygnus.com)
* flow.c (life_analysis): Do not conside the stack pointer live at
the end of a function if the fucntio ncalls alloca.
(mark_used_regs): Similarly.
1998-02-10 John F Carr <jfc@mit.edu>
* config/sparc/sparc.md (movdi_v8plus): Output stx on alternative

8
gcc/flow.c

@ -1094,7 +1094,9 @@ life_analysis (f, nregs)
if (n_basic_blocks > 0)
#ifdef EXIT_IGNORE_STACK
if (! EXIT_IGNORE_STACK
|| (! FRAME_POINTER_REQUIRED && flag_omit_frame_pointer))
|| (! FRAME_POINTER_REQUIRED
&& ! current_function_calls_alloca
&& flag_omit_frame_pointer))
#endif
{
/* If exiting needs the right stack value,
@ -2656,7 +2658,9 @@ mark_used_regs (needed, live, x, final, insn)
#ifdef EXIT_IGNORE_STACK
if (! EXIT_IGNORE_STACK
|| (! FRAME_POINTER_REQUIRED && flag_omit_frame_pointer))
|| (! FRAME_POINTER_REQUIRED
&& ! current_function_calls_alloca
&& flag_omit_frame_pointer))
#endif
SET_REGNO_REG_SET (live, STACK_POINTER_REGNUM);