https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94735
Bug ID: 94735 Summary: MVE vector load/store pair getting removed with -O2. Product: gcc Version: 10.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: sripar01 at gcc dot gnu.org Target Milestone: --- Created attachment 48362 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48362&action=edit test case $ arm-none-eabi-gcc -v Using built-in specs. COLLECT_GCC=arm-none-eabi-gcc COLLECT_LTO_WRAPPER=/media/sripar01/2tb_work/Release/build-arm-none-eabi/install/libexec/gcc/arm-none-eabi/10.0.1/lto-wrapper Target: arm-none-eabi Configured with: /media/sripar01/2tb_work/Release/src/gcc/configure --target=arm-none-eabi --prefix=/media/sripar01/2tb_work/Release/build-arm-none-eabi/install// --with-gmp=/media/sripar01/2tb_work/Release/build-arm-none-eabi/host-tools --with-mpfr=/media/sripar01/2tb_work/Release/build-arm-none-eabi/host-tools --with-mpc=/media/sripar01/2tb_work/Release/build-arm-none-eabi/host-tools --with-isl=/media/sripar01/2tb_work/Release/build-arm-none-eabi/host-tools --disable-shared --disable-nls --disable-threads --disable-tls --enable-checking=yes --enable-languages=c --without-cloog --without-isl --with-newlib --without-headers --with-multilib-list=rmprofile --with-pkgversion=unknown Thread model: single Supported LTO compression algorithms: zlib gcc version 10.0.1 20200423 (experimental) (unknown) $ arm-none-eabi-gcc mve_vstore.i -S -O2 -march=armv8.1-m.main+mve -mfloat-abi=hard On compiling attached test case (mve_vstore.i) with -02 optimizes out a pair of vector load/store statements.