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* target.h (init_dwarf_reg_sizes_extra): New target hook. * target-def.h (TARGET_INIT_DWARF_REG_SIZES_EXTRA): New default. * doc/tm.texi (TARGET_INIT_DWARF_REG_SIZES_EXTRA): Document. * dwarf2out.c (expand_builtin_init_dwarf_reg_sizes): Call this hook. * config/rs6000/rs6000.c (TARGET_INIT_DWARF_REG_SIZES_EXTRA, rs6000_init_dwarf_reg_sizes_extra): New. * config/rs6000/linux-unwind.h (ppc_fallback_frame_state): Support SPE register high parts. testsuite: * gcc.target/powerpc/spe-unwind-1.c, g++.dg/eh/simd-5.C: New tests. From-SVN: r122468
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