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author | Yiran Wang <yiran@google.com> | 2015-06-23 15:33:17 -0700 |
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committer | Yiran Wang <yiran@google.com> | 2015-06-29 10:56:28 -0700 |
commit | 1d9fec7937f45dde5e04cac966a2d9a12f2fc15a (patch) | |
tree | 3fbcd18a379a05fd6d43491a107e1f36bc61b185 /gcc-4.9/gcc/varpool.c | |
parent | f378ebf14df0952eae870c9865bab8326aa8f137 (diff) | |
download | toolchain_gcc-1d9fec7937f45dde5e04cac966a2d9a12f2fc15a.zip toolchain_gcc-1d9fec7937f45dde5e04cac966a2d9a12f2fc15a.tar.gz toolchain_gcc-1d9fec7937f45dde5e04cac966a2d9a12f2fc15a.tar.bz2 |
Synchronize with google/gcc-4_9 to r224707 (from r214835)
Change-Id: I3d6f06fc613c8f8b6a82143dc44b7338483aac5d
Diffstat (limited to 'gcc-4.9/gcc/varpool.c')
-rw-r--r-- | gcc-4.9/gcc/varpool.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/gcc-4.9/gcc/varpool.c b/gcc-4.9/gcc/varpool.c index d9b9a1a..6b64397 100644 --- a/gcc-4.9/gcc/varpool.c +++ b/gcc-4.9/gcc/varpool.c @@ -335,8 +335,16 @@ ctor_for_folding (tree decl) /* Variables declared 'const' without an initializer have zero as the initializer if they may not be - overridden at link or run time. */ - if (!DECL_INITIAL (real_decl) + overridden at link or run time. + + It is actually requirement for C++ compiler to optimize const variables + consistently. As a GNU extension, do not enfore this rule for user defined + weak variables, so we support interposition on: + static const int dummy = 0; + extern const int foo __attribute__((__weak__, __alias__("dummy"))); + */ + if ((!DECL_INITIAL (real_decl) + || (DECL_WEAK (decl) && !DECL_COMDAT (decl))) && (DECL_EXTERNAL (decl) || decl_replaceable_p (decl))) return error_mark_node; |