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r278509 - in /trunk/gcc: ChangeLog common.opt d...
- From: wilco at gcc dot gnu dot org
- To: gcc-cvs at gcc dot gnu dot org
- Date: Wed, 20 Nov 2019 16:29:23 -0000
- Subject: r278509 - in /trunk/gcc: ChangeLog common.opt d...
Author: wilco
Date: Wed Nov 20 16:29:23 2019
New Revision: 278509
URL: https://gcc.gnu.org/viewcvs?rev=278509&root=gcc&view=rev
Log:
PR85678: Change default to -fno-common
GCC currently defaults to -fcommon. As discussed in the PR, this is an ancient
C feature which is not conforming with the latest C standards. On many targets
this means global variable accesses have a codesize and performance penalty.
This applies to C code only, C++ code is not affected by -fcommon. It is about
time to change the default.
gcc/
PR85678
* common.opt (fcommon): Change init to 1.
* invoke.texi (-fcommon): Update documentation.
testsuite/
* g++.dg/lto/odr-6_1.c: Add -fcommon.
* gcc.dg/alias-15.c: Likewise.
* gcc.dg/fdata-sections-1.c: Likewise.
* gcc.dg/ipa/pr77653.c: Likewise.
* gcc.dg/lto/20090729_0.c: Likewise.
* gcc.dg/lto/20111207-1_0.c: Likewise.
* gcc.dg/lto/c-compatible-types-1_0.c: Likewise.
* gcc.dg/lto/pr55525_0.c: Likewise.
* gcc.dg/lto/pr88077_0.c: Use long to avoid alignment warning.
* gcc.dg/lto/pr88077_1.c: Add -fcommon.
* gcc.target/aarch64/sve/peel_ind_1.c: Allow ANCHOR0.
* gcc.target/aarch64/sve/peel_ind_2.c: Likewise.
* gcc.target/aarch64/sve/peel_ind_3.c: Likewise.
* gcc.target/i386/volatile-bitfields-2.c: Allow movl or movq.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/common.opt
trunk/gcc/doc/invoke.texi
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/lto/odr-6_1.c
trunk/gcc/testsuite/gcc.dg/alias-15.c
trunk/gcc/testsuite/gcc.dg/fdata-sections-1.c
trunk/gcc/testsuite/gcc.dg/ipa/pr77653.c
trunk/gcc/testsuite/gcc.dg/lto/20090729_0.c
trunk/gcc/testsuite/gcc.dg/lto/20111207-1_0.c
trunk/gcc/testsuite/gcc.dg/lto/c-compatible-types-1_0.c
trunk/gcc/testsuite/gcc.dg/lto/pr55525_0.c
trunk/gcc/testsuite/gcc.dg/lto/pr88077_0.c
trunk/gcc/testsuite/gcc.dg/lto/pr88077_1.c
trunk/gcc/testsuite/gcc.target/aarch64/sve/peel_ind_1.c
trunk/gcc/testsuite/gcc.target/aarch64/sve/peel_ind_2.c
trunk/gcc/testsuite/gcc.target/aarch64/sve/peel_ind_3.c
trunk/gcc/testsuite/gcc.target/i386/volatile-bitfields-2.c