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| author | Eric Botcazou <ebotcazou@adacore.com> | 2009-11-03 22:49:37 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2009-11-03 22:49:37 +0000 |
| commit | d809253a56a642cdeb31f3f12e420f092cee0d07 (patch) | |
| tree | f611e7abf6528b7dc5e27a9acf00f201c85571a7 /gcc/rtlanal.c | |
| parent | 24d179b4c7717ceeceef16166064bd4a3933cb11 (diff) | |
| download | gcc-d809253a56a642cdeb31f3f12e420f092cee0d07.tar.gz | |
re PR target/10127 (-fstack-check let's program crash)
PR target/10127
PR ada/20548
* expr.h (STACK_CHECK_PROBE_INTERVAL): Delete.
(STACK_CHECK_PROBE_INTERVAL_EXP): New macro.
(STACK_CHECK_MOVING_SP): Likewise.
* system.h (STACK_CHECK_PROBE_INTERVAL): Poison it.
* doc/tm.texi (Stack Checking): Delete STACK_CHECK_PROBE_INTERVAL.
Document STACK_CHECK_PROBE_INTERVAL_EXP and STACK_CHECK_MOVING_SP.
* doc/md.texi (Standard Pattern Names): Tweak entry of CHECK_STACK.
Document PROBE_STACK.
* explow.c (anti_adjust_stack_and_probe): New function.
(allocate_dynamic_stack_space): Do not directly allocate space if
STACK_CHECK_MOVING_SP, instead invoke above function.
(emit_stack_probe): Handle probe_stack insn.
(PROBE_INTERVAL): New macro.
(STACK_GROW_OPTAB): Likewise.
(STACK_GROW_OFF): Likewise.
(probe_stack_range): Use Pmode and memory_address consistently. Fix
loop condition in the small constant case. Rewrite in the general
case to be immune to wraparounds. Make sure the address of probes
is valid. Try to use [base + disp] addressing mode if possible.
* ira.c (setup_eliminable_regset): Set frame_pointer_needed if stack
checking is enabled and STACK_CHECK_MOVING_SP.
* rtlanal.c (may_trap_p_1) <MEM>: If stack checking is enabled,
return 1 for volatile references to the stack pointer.
* tree.c (build_common_builtin_nodes): Do not set ECF_NOTHROW on
__builtin_alloca if stack checking is enabled.
* unwind-dw2.c (uw_identify_context): Take into account whether the
context is that of a signal frame or not.
* config/i386/linux.h (STACK_CHECK_MOVING_SP): Define to 1.
* config/i386/linux64.h (STACK_CHECK_MOVING_SP): Likewise.
From-SVN: r153877
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index 120d37a830c..ab88f23a379 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -2252,6 +2252,11 @@ may_trap_p_1 (const_rtx x, unsigned flags) /* Memory ref can trap unless it's a static var or a stack slot. */ case MEM: + /* Recognize specific pattern of stack checking probes. */ + if (flag_stack_check + && MEM_VOLATILE_P (x) + && XEXP (x, 0) == stack_pointer_rtx) + return 1; if (/* MEM_NOTRAP_P only relates to the actual position of the memory reference; moving it out of context such as when moving code when optimizing, might cause its address to become invalid. */ |