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re PR tree-optimization/87672 (81512c36 causes ICE in bootstrap stage 3 using "-D_FORTIFY_SOURCE=2" (invalid operand in unary operation, incorrect sharing of tree nodes, verify_gimple failed))

Browse Source 
gcc:
2018-11-04  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR tree-optimization/87672
        * gimple-fold.c (gimple_fold_builtin_stxcpy_chk): Gimplify.
        * tree-ssa-strlen.c (handle_builtin_strcat): Adjust object size.

testsuite:
2018-11-04  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR tree-optimization/87672
        * gcc.dg/pr87672.c: New test.

From-SVN: r265777
This commit is contained in:
Bernd Edlinger 2018-11-04 19:46:08 +00:00 committed by Bernd Edlinger
parent e237f9f31d
commit 770fe3a364
5 changed files with 32 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2018-11-04 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR tree-optimization/87672
* gimple-fold.c (gimple_fold_builtin_stxcpy_chk): Gimplify.
* tree-ssa-strlen.c (handle_builtin_strcat): Adjust object size.
2018-11-04 Uros Bizjak <ubizjak@gmail.com>
PR middle-end/58372

1
gcc/gimple-fold.c
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@ -2715,6 +2715,7 @@ gimple_fold_builtin_stxcpy_chk (gimple_stmt_iterator *gsi,
return false;
gimple_seq stmts = NULL;
len = force_gimple_operand (len, &stmts, true, NULL_TREE);
len = gimple_convert (&stmts, loc, size_type_node, len);
len = gimple_build (&stmts, loc, PLUS_EXPR, size_type_node, len,
build_int_cst (size_type_node, 1));

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2018-11-04 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR tree-optimization/87672
* gcc.dg/pr87672.c: New test.
2018-11-04 Uros Bizjak <ubizjak@gmail.com>
PR middle-end/58372

11
gcc/testsuite/gcc.dg/pr87672.c Normal file
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@ -0,0 +1,11 @@
/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-optimized" } */
char buf[40];
void test (int x)
{
__builtin_strcpy (buf, "test");
__builtin___strcat_chk (buf, "postfix" + x, sizeof (buf));
}
/* { dg-final { scan-tree-dump "memcpy_chk.*, 36\\)" "optimized" } } */

11
gcc/tree-ssa-strlen.c
View File

@ -2605,12 +2605,19 @@ handle_builtin_strcat (enum built_in_function bcode, gimple_stmt_iterator *gsi)
if (endptr)
dst = fold_convert_loc (loc, TREE_TYPE (dst), unshare_expr (endptr));
else
dst = fold_build2_loc (loc, POINTER_PLUS_EXPR,
TREE_TYPE (dst), unshare_expr (dst),
dst = fold_build2_loc (loc, POINTER_PLUS_EXPR, TREE_TYPE (dst), dst,
fold_convert_loc (loc, sizetype,
unshare_expr (dstlen)));
dst = force_gimple_operand_gsi (gsi, dst, true, NULL_TREE, true,
GSI_SAME_STMT);
if (objsz)
{
objsz = fold_build2_loc (loc, MINUS_EXPR, TREE_TYPE (objsz), objsz,
fold_convert_loc (loc, TREE_TYPE (objsz),
unshare_expr (dstlen)));
objsz = force_gimple_operand_gsi (gsi, objsz, true, NULL_TREE, true,
GSI_SAME_STMT);
}
if (dump_file && (dump_flags & TDF_DETAILS) != 0)
{
fprintf (dump_file, "Optimizing: ");