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This caused the DebugInfo/Sparc/gnu-window-save.ll test to fail. > Functions that have signed return addresses need additional dwarf support: > - After signing the LR, and before authenticating it, the LR register is in a > state the is unusable by a debugger or unwinder > - To account for this a new directive, .cfi_negate_ra_state, is added > - This directive says the signed state of the LR register has now changed, > i.e. unsigned -> signed or signed -> unsigned > - This directive has the same CFA code as the SPARC directive GNU_window_save > (0x2d), adding a macro to account for multiply defined codes > - This patch matches the gcc implementation of this support: > https://patchwork.ozlabs.org/patch/800271/ > > Differential Revision: https://reviews.llvm.org/D50136 llvm-svn: 343103
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