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re PR tree-optimization/79908 (ICE in gimplify_expr (gimplify.c:12155) gimplification failed) 

[gcc]

2017-03-21  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/79908
	* tree-stdarg.c (expand_ifn_va_arg_1): Revert the following
	change: For a VA_ARG whose LHS has been cast away, use
	force_gimple_operand to construct the side effects.

[gcc/testsuite]

2017-03-21  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/79908
	* gcc.dg/torture/pr79908.c: Revert addition of new file.

From-SVN: r246330
This commit is contained in:
Bill Schmidt 2017-03-21 18:14:42 +00:00 committed by William Schmidt
parent efebb49e44
commit 1cefb0511e
4 changed files with 16 additions and 20 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2017-03-21 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/79908
* tree-stdarg.c (expand_ifn_va_arg_1): Revert the following
change: For a VA_ARG whose LHS has been cast away, use
force_gimple_operand to construct the side effects.
2017-03-21 David Malcolm <dmalcolm@redhat.com>
PR translation/80001

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2017-03-21 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/79908
* gcc.dg/torture/pr79908.c: Revert addition of new file.
2017-03-21 Marek Polacek <polacek@redhat.com>
Martin Sebor <msebor@redhat.com>

12
gcc/testsuite/gcc.dg/torture/pr79908.c
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@ -1,12 +0,0 @@
/* { dg-do compile } */
/* Used to fail in the stdarg pass before fix for PR79908. */
typedef __builtin_va_list __gnuc_va_list;
typedef __gnuc_va_list va_list;
void testva (int n, ...)
{
va_list ap;
_Complex int i = __builtin_va_arg (ap, _Complex int);
}

12
gcc/tree-stdarg.c
View File

@ -33,7 +33,6 @@ along with GCC; see the file COPYING3. If not see
#include "gimple-iterator.h"
#include "gimple-walk.h"
#include "gimplify.h"
#include "gimplify-me.h"
#include "tree-into-ssa.h"
#include "tree-cfg.h"
#include "tree-stdarg.h"
@ -1059,16 +1058,12 @@ expand_ifn_va_arg_1 (function *fun)
gimplify_assign (lhs, expr, &pre);
}
else
{
gimple_seq tmp_seq;
force_gimple_operand (expr, &tmp_seq, false, NULL_TREE);
gimple_seq_add_seq_without_update (&pre, tmp_seq);
}
gimplify_expr (&expr, &pre, &post, is_gimple_lvalue, fb_lvalue);
input_location = saved_location;
pop_gimplify_context (NULL);
gimple_seq_add_seq_without_update (&pre, post);
gimple_seq_add_seq (&pre, post);
update_modified_stmts (pre);
/* Add the sequence after IFN_VA_ARG. This splits the bb right
@ -1077,10 +1072,11 @@ expand_ifn_va_arg_1 (function *fun)
gimple_find_sub_bbs (pre, &i);
/* Remove the IFN_VA_ARG gimple_call. It's the last stmt in the
bb if we added any stmts. */
bb. */
unlink_stmt_vdef (stmt);
release_ssa_name_fn (fun, gimple_vdef (stmt));
gsi_remove (&i, true);
gcc_assert (gsi_end_p (i));
/* We're walking here into the bbs which contain the expansion of
IFN_VA_ARG, and will not contain another IFN_VA_ARG that needs