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On Thu, 15 Jul 2021 at 15:07, Christophe LYON via Gcc-patches <gcc-patches@gcc.gnu.org> wrote: > > This is a followup to Srinath's recent patch: the newly added test is > failing e.g. on arm-linux-gnueabihf without R/M profile multilibs. > > It is also failing on arm-eabi with R/M profile multilibs if the > execution engine does not support v8.1-M instructions. > > The patch avoids this by adding check_effective_target_FUNC_multilib > in target-supports.exp which effectively checks whether the target > supports linking and execution, like what is already done for other > ARM effective targets. pr100856.c is updated to use it instead of > arm_v8_1m_main_cde_mve_ok (which makes the testcase a bit of a > duplicate with check_effective_target_FUNC_multilib). > > In addition, I noticed that requiring MVE does not seem necessary and > this enables the test to pass even when targeting a CPU without MVE: > since the test does not involve actual CDE instructions, it can pass > on other architecture versions. For instance, when requiring MVE, we > have to use cortex-m55 under QEMU for the test to pass because the > memset() that comes from v8.1-m.main+mve multilib uses LOB > instructions (DLS) (memset is used during startup). Keeping > arm_v8_1m_main_cde_mve_ok would mean we would enable the test provided > we have the right multilibs, causing a runtime error if the simulator > does not support LOB instructions (e.g. when targeting cortex-m7). > > I do not update sourcebuild.texi since the CDE effective targets are > already collectively documented. > > Finally, the patch fixes two typos in comments. > > 2021-07-15 Christophe Lyon <christophe.l...@foss.st.com> > > PR target/100856 > gcc/ > * config/arm/arm.opt: Fix typo. > * config/arm/t-rmprofile: Fix typo. > > gcc/testsuite/ > * gcc.target/arm/acle/pr100856.c: Use arm_v8m_main_cde_multilib > and arm_v8m_main_cde. > * lib/target-supports.exp: Add > check_effective_target_FUNC_multilib for ARM CDE. > >
