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Fix ICE when __builtin_calloc has no LHS (PR tree-optimization/91014).

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2019-06-27  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/91014
	* tree-ssa-dse.c (initialize_ao_ref_for_dse): Bail out
	when LHS is NULL_TREE.
2019-06-27  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/91014
	* gcc.target/s390/pr91014.c: New test.

From-SVN: r272738
This commit is contained in:
Martin Liska 2019-06-27 11:41:34 +02:00 • committed by Martin Liska
parent fecd7a1ab4
commit 4c4be718fb
4 changed files with 22 additions and 2 deletions
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6
gcc/ChangeLog
View file

@ -1,3 +1,9 @@
2019-06-27 Martin Liska <mliska@suse.cz>
PR tree-optimization/91014
* tree-ssa-dse.c (initialize_ao_ref_for_dse): Bail out
when LHS is NULL_TREE.
2019-06-27 Martin Liska <mliska@suse.cz>
* symbol-summary.h (traverse): Pass

5
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2019-06-27 Martin Liska <mliska@suse.cz>
PR tree-optimization/91014
* gcc.target/s390/pr91014.c: New test.
2019-06-27 Richard Biener <rguenther@suse.de>
PR testsuite/91004

8
gcc/testsuite/gcc.target/s390/pr91014.c Normal file
View file

@ -0,0 +1,8 @@
/* { dg-do compile } */
/* { dg-options "-O" } */
/* { dg-require-effective-target alloca } */
void foo(void)
{
__builtin_calloc (1, 1); /* { dg-warning "ignoring return value of '__builtin_calloc' declared with attribute 'warn_unused_result'" } */
}

5
gcc/tree-ssa-dse.c
View file

@ -129,10 +129,11 @@ initialize_ao_ref_for_dse (gimple *stmt, ao_ref *write)
{
tree nelem = gimple_call_arg (stmt, 0);
tree selem = gimple_call_arg (stmt, 1);
tree lhs;
if (TREE_CODE (nelem) == INTEGER_CST
&& TREE_CODE (selem) == INTEGER_CST)
&& TREE_CODE (selem) == INTEGER_CST
&& (lhs = gimple_call_lhs (stmt)) != NULL_TREE)
{
tree lhs = gimple_call_lhs (stmt);
tree size = fold_build2 (MULT_EXPR, TREE_TYPE (nelem),
nelem, selem);
ao_ref_init_from_ptr_and_size (write, lhs, size);