search for: mca_code_regions

...vsd %xmm1, -16(%rbp) .Lmca_code_region_start_0: # LLVM-MCA-START ID: 42 xorps %xmm0, %xmm0 movsd %xmm0, -24(%rbp) movsd -8(%rbp), %xmm0 mulsd -16(%rbp), %xmm0 addsd -24(%rbp), %xmm0 movsd %xmm0, -24(%rbp) .Lmca_code_region_end_0: # LLVM-MCA-END ID: 42 movsd -24(%rbp), %xmm0 popq %rbp retq .section .mca_code_regions,"", at progbits .quad 42 .quad .Lmca_code_region_start_0 .quad .Lmca_code_region_end_0-.Lmca_code_region_start_0 The assembly has been trimmed to show the portions relevant to this RFC. Notice the labels enclose the user's defined region, and that they preserve the user's arbitra...

...bp) > > movsd -8(%rbp), %xmm0 > > mulsd -16(%rbp), %xmm0 > > addsd -24(%rbp), %xmm0 > > movsd %xmm0, -24(%rbp) > > .Lmca_code_region_end_0: # LLVM-MCA-END ID: 42 > > movsd -24(%rbp), %xmm0 > > popq %rbp > > retq > > .section .mca_code_regions,"", at progbits > > .quad 42 > > .quad .Lmca_code_region_start_0 > > .quad .Lmca_code_region_end_0-.Lmca_code_region_start_0 > > > > The assembly has been trimmed to show the portions relevant to this RFC. > > Notice the labels enclose the user...

...direction of this RFC. However, I am interesting to hear from other developers about your suggested design. > This initial patch only targets ELF object files, and does not handle relocatable addresses. Since the start of a code region is represented as an assembly label, and referenced in the .mca_code_regions section, that address is relocatable. This may be okay for now. However, it would be nice to remove that constraint in future and add support to generic object files. -Andrea On Thu, Nov 22, 2018 at 7:21 PM <Matthew.Davis at sony.com> wrote: > I want to clarify a few restrictions of ll...

...om other developers about your > > suggested design. > > > > > This initial patch only targets ELF object files, and does not handle > > relocatable addresses. Since the start of a code region is represented as > > an > > assembly label, and referenced in the .mca_code_regions section, that > > address > > is relocatable. > > > > This may be okay for now. However, it would be nice to remove that > > constraint in future and add support to generic object files. > > > > -Andrea > > > > On Thu, Nov 22, 2018 at 7:21 PM &l...

...> This initial patch only targets ELF object files, and does not >>>> handle >>>>>> relocatable addresses. Since the start of a code region is >>>> represented as >>>>>> an >>>>>> assembly label, and referenced in the .mca_code_regions section, that >>>>>> address >>>>>> is relocatable. >>>>>> >>>>>> This may be okay for now. However, it would be nice to remove that >>>>>> constraint in future and add support to generic object files. >&gt...

...> > > >> > > > This initial patch only targets ELF object files, and does not >> handle >> > > relocatable addresses. Since the start of a code region is >> represented as >> > > an >> > > assembly label, and referenced in the .mca_code_regions section, that >> > > address >> > > is relocatable. >> > > >> > > This may be okay for now. However, it would be nice to remove that >> > > constraint in future and add support to generic object files. >> > > >> > >...