re PR sanitizer/79589 (ICE in gimplify_compound_expr (gimplify.c:5712) with -fsanitize=undefined)
PR sanitizer/79589 * decl.c: Include gimplify.h. (cp_finish_decomp): Make sure there is no sharing of trees in between DECL_VALUE_EXPR of decomposition decls. * g++.dg/ubsan/pr79589.C: New test. From-SVN: r245638
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@ -1,5 +1,10 @@
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2017-02-21 Jakub Jelinek <jakub@redhat.com>
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PR sanitizer/79589
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* decl.c: Include gimplify.h.
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(cp_finish_decomp): Make sure there is no sharing of trees
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in between DECL_VALUE_EXPR of decomposition decls.
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PR c++/79655
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* constexpr.c (cxx_eval_array_reference): Diagnose negative subscript.
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@ -50,6 +50,7 @@ along with GCC; see the file COPYING3. If not see
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#include "plugin.h"
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#include "cilk.h"
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#include "builtins.h"
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#include "gimplify.h"
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/* Possible cases of bad specifiers type used by bad_specifiers. */
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enum bad_spec_place {
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@ -7470,7 +7471,7 @@ cp_finish_decomp (tree decl, tree first, unsigned int count)
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{
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TREE_TYPE (v[i]) = eltype;
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layout_decl (v[i], 0);
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tree t = dexp;
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tree t = unshare_expr (dexp);
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t = build4_loc (DECL_SOURCE_LOCATION (v[i]), ARRAY_REF,
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eltype, t, size_int (i), NULL_TREE,
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NULL_TREE);
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@ -7489,7 +7490,7 @@ cp_finish_decomp (tree decl, tree first, unsigned int count)
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{
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TREE_TYPE (v[i]) = eltype;
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layout_decl (v[i], 0);
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tree t = dexp;
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tree t = unshare_expr (dexp);
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t = build1_loc (DECL_SOURCE_LOCATION (v[i]),
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i ? IMAGPART_EXPR : REALPART_EXPR, eltype,
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t);
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@ -7507,7 +7508,7 @@ cp_finish_decomp (tree decl, tree first, unsigned int count)
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{
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TREE_TYPE (v[i]) = eltype;
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layout_decl (v[i], 0);
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tree t = dexp;
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tree t = unshare_expr (dexp);
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convert_vector_to_array_for_subscript (DECL_SOURCE_LOCATION (v[i]),
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&t, size_int (i));
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t = build4_loc (DECL_SOURCE_LOCATION (v[i]), ARRAY_REF,
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@ -7606,7 +7607,8 @@ cp_finish_decomp (tree decl, tree first, unsigned int count)
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continue;
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else
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{
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tree tt = finish_non_static_data_member (field, t, NULL_TREE);
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tree tt = finish_non_static_data_member (field, unshare_expr (t),
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NULL_TREE);
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if (REFERENCE_REF_P (tt))
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tt = TREE_OPERAND (tt, 0);
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TREE_TYPE (v[i]) = TREE_TYPE (tt);
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@ -1,3 +1,8 @@
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2017-02-21 Jakub Jelinek <jakub@redhat.com>
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PR sanitizer/79589
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* g++.dg/ubsan/pr79589.C: New test.
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2017-02-21 Jeff Law <law@redhat.com>
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PR tree-optimization/79621
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@ -0,0 +1,13 @@
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// PR sanitizer/79589
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// { dg-do compile }
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// { dg-options "-fsanitize=undefined -std=c++1z" }
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struct A { char a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r; } a[64];
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void
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foo ()
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{
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int z = 0;
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for (auto & [ b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s ] : a)
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z += b + c + d + e + f + g + h + i + j + k + l + m + n + o + p + q + r + s;
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}
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