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| author | CoprDistGit <infra@openeuler.org> | 2024-08-01 14:23:42 +0000 |
|---|---|---|
| committer | CoprDistGit <infra@openeuler.org> | 2024-08-01 14:23:42 +0000 |
| commit | 82711f6567ef069eebb942e382e2c3fa61fbf538 (patch) | |
| tree | 22200b7326b32ca672ffb6e4ce6d19a09dc476e5 /gcc48-pr80129.patch | |
| parent | 5d624aa0d36abe76a344f0593eae5cf36d083b15 (diff) | |
automatic import of compat-libgfortran-48openeuler24.03_LTSopeneuler23.09
Diffstat (limited to 'gcc48-pr80129.patch')
| -rw-r--r-- | gcc48-pr80129.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/gcc48-pr80129.patch b/gcc48-pr80129.patch new file mode 100644 index 0000000..34e160e --- /dev/null +++ b/gcc48-pr80129.patch @@ -0,0 +1,45 @@ +2017-05-30 Jakub Jelinek <jakub@redhat.com> + + Backported from mainline + 2017-03-22 Jakub Jelinek <jakub@redhat.com> + + PR c++/80129 + * gimplify.c (gimplify_modify_expr_rhs) <case COND_EXPR>: Clear + TREE_READONLY on result if writing it more than once. + + * g++.dg/torture/pr80129.C: New test. + +--- gcc/gimplify.c ++++ gcc/gimplify.c +@@ -4293,6 +4293,14 @@ gimplify_modify_expr_rhs (tree *expr_p, tree *from_p, tree *to_p, + if (ret != GS_ERROR) + ret = GS_OK; + ++ /* If we are going to write RESULT more than once, clear ++ TREE_READONLY flag, otherwise we might incorrectly promote ++ the variable to static const and initialize it at compile ++ time in one of the branches. */ ++ if (TREE_CODE (result) == VAR_DECL ++ && TREE_TYPE (TREE_OPERAND (cond, 1)) != void_type_node ++ && TREE_TYPE (TREE_OPERAND (cond, 2)) != void_type_node) ++ TREE_READONLY (result) = 0; + if (TREE_TYPE (TREE_OPERAND (cond, 1)) != void_type_node) + TREE_OPERAND (cond, 1) + = build2 (code, void_type_node, result, +--- /dev/null ++++ gcc/testsuite/g++.dg/torture/pr80129.C +@@ -0,0 +1,14 @@ ++// PR c++/80129 ++// { dg-do run } ++// { dg-options "-std=c++11" } ++ ++struct A { bool a; int b; }; ++ ++int ++main () ++{ ++ bool c = false; ++ const A x = c ? A {true, 1} : A {false, 0}; ++ if (x.a) ++ __builtin_abort (); ++} |