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Commit 4a61cf9c by Jeff Law Committed by Jeff Law
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tree-ssa-dse.c (initialize_ao_ref_for_dse): Handle _chk variants of memcpy,… 

tree-ssa-dse.c (initialize_ao_ref_for_dse): Handle _chk variants of memcpy, memmove and memset builtins.

	* tree-ssa-dse.c (initialize_ao_ref_for_dse): Handle _chk variants of
	memcpy, memmove and memset builtins.
	(maybe_trim_memstar_call): Likewise.

	* gcc.c-torture/execute/builtins/builtins.exp: Add -fno-tree-dse
	as DSE compromises several of these tests.
	* gcc.dg/builtin-stringop-chk-1.c: Similarly.
	* gcc.dg/memcpy-2.c: Similarly.
	* gcc.dg/pr40340-1.c: Similarly.
	* gcc.dg/pr40340-2.c: Similarly.
	* gcc.dg/pr40340-5.c: Similarly.

From-SVN: r272704
parent f363fc5b
Showing with 31 additions and 6 deletions
gcc/ChangeLog
2019-06-26 Jeff Law <law@redhat.com>
* tree-ssa-dse.c (initialize_ao_ref_for_dse): Handle _chk variants of
memcpy, memmove and memset builtins.
(maybe_trim_memstar_call): Likewise.
2019-06-26 David Edelsohn <dje.gcc@gmail.com>
* config/rs6000/rs6000-logue.c: Add #ifndef TARGET_PROFILE_KERNEL.
......
gcc/testsuite/ChangeLog
2019-06-26 Jeff Law <law@redhat.com>
* gcc.c-torture/execute/builtins/builtins.exp: Add -fno-tree-dse
as DSE compromises several of these tests.
* gcc.dg/builtin-stringop-chk-1.c: Similarly.
* gcc.dg/memcpy-2.c: Similarly.
* gcc.dg/pr40340-1.c: Similarly.
* gcc.dg/pr40340-2.c: Similarly.
* gcc.dg/pr40340-5.c: Similarly.
2019-06-26 Steven G. Kargl <kargl@gcc.gnu.org>
PR Fortran/90988
......
gcc/testsuite/gcc.c-torture/execute/builtins/builtins.exp
......@@ -37,7 +37,7 @@ load_lib c-torture.exp
torture-init
set-torture-options $C_TORTURE_OPTIONS {{}} $LTO_TORTURE_OPTIONS
set additional_flags "-fno-tree-loop-distribute-patterns -fno-tracer"
set additional_flags "-fno-tree-dse -fno-tree-loop-distribute-patterns -fno-tracer"
if [istarget "powerpc-*-darwin*"] {
lappend additional_flags "-Wl,-multiply_defined,suppress"
}
......
gcc/testsuite/gcc.dg/builtin-stringop-chk-1.c
/* Test whether buffer overflow warnings for __*_chk builtins
are emitted properly. */
/* { dg-do compile } */
/* { dg-options "-O2 -Wno-format -std=gnu99 -ftrack-macro-expansion=0" } */
/* { dg-options "-O2 -Wno-format -std=gnu99 -ftrack-macro-expansion=0 -fno-tree-dse" } */
// { dg-skip-if "packed attribute missing for t" { "epiphany-*-*" } }
extern void abort (void);
......
gcc/testsuite/gcc.dg/memcpy-2.c
/* PR middle-end/38454 */
/* { dg-do compile } */
/* { dg-options "-O2" } */
/* { dg-options "-O2 -fno-tree-dse" } */
typedef __SIZE_TYPE__ size_t;
......
gcc/testsuite/gcc.dg/pr40340-1.c
/* PR middle-end/40340 */
/* { dg-do compile } */
/* { dg-options "-O2 -Wall -Wno-system-headers" } */
/* { dg-options "-O2 -Wall -Wno-system-headers -fno-tree-dse" } */
#include "pr40340.h"
......
gcc/testsuite/gcc.dg/pr40340-2.c
/* PR middle-end/40340 */
/* { dg-do compile } */
/* { dg-options "-O2 -Wall -Wno-system-headers" } */
/* { dg-options "-O2 -Wall -Wno-system-headers -fno-tree-dse" } */
#include "pr40340.h"
......
gcc/testsuite/gcc.dg/pr40340-5.c
/* PR middle-end/40340 */
/* { dg-do compile } */
/* { dg-options "-O2 -Wall -Wsystem-headers -g" } */
/* { dg-options "-O2 -Wall -Wsystem-headers -g -fno-tree-dse" } */
#define TEST3
#include "pr40340.h"
......
gcc/tree-ssa-dse.c
......@@ -98,6 +98,9 @@ initialize_ao_ref_for_dse (gimple *stmt, ao_ref *write)
case BUILT_IN_MEMCPY:
case BUILT_IN_MEMMOVE:
case BUILT_IN_MEMSET:
case BUILT_IN_MEMCPY_CHK:
case BUILT_IN_MEMMOVE_CHK:
case BUILT_IN_MEMSET_CHK:
{
tree size = NULL_TREE;
if (gimple_call_num_args (stmt) == 3)
......@@ -434,6 +437,8 @@ maybe_trim_memstar_call (ao_ref *ref, sbitmap live, gimple *stmt)
{
case BUILT_IN_MEMCPY:
case BUILT_IN_MEMMOVE:
case BUILT_IN_MEMCPY_CHK:
case BUILT_IN_MEMMOVE_CHK:
{
int head_trim, tail_trim;
compute_trims (ref, live, &head_trim, &tail_trim, stmt);
......@@ -455,6 +460,7 @@ maybe_trim_memstar_call (ao_ref *ref, sbitmap live, gimple *stmt)
}
case BUILT_IN_MEMSET:
case BUILT_IN_MEMSET_CHK:
{
int head_trim, tail_trim;
compute_trims (ref, live, &head_trim, &tail_trim, stmt);
......@@ -860,6 +866,9 @@ dse_dom_walker::dse_optimize_stmt (gimple_stmt_iterator *gsi)
case BUILT_IN_MEMCPY:
case BUILT_IN_MEMMOVE:
case BUILT_IN_MEMSET:
case BUILT_IN_MEMCPY_CHK:
case BUILT_IN_MEMMOVE_CHK:
case BUILT_IN_MEMSET_CHK:
{
/* Occasionally calls with an explicit length of zero
show up in the IL. It's pointless to do analysis
......
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