[RS6000] Make -msingle-pic-base remove the ELFv2 global entry code
For other ABIs, -msingle-pic-base makes gcc omit loading of the PIC register in function prologues. This patch makes the option affect ELFv2 too. * config/rs6000/rs6000.c (rs6000_emit_prologue): Don't set r2_setup_needed when TARGET_SINGLE_PIC_BASE. (rs6000_output_mi_thunk): Likewise. From-SVN: r228309
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@ -1,3 +1,9 @@
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2015-10-01 Alan Modra <amodra@gmail.com>
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* config/rs6000/rs6000.c (rs6000_emit_prologue): Don't set
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r2_setup_needed when TARGET_SINGLE_PIC_BASE.
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(rs6000_output_mi_thunk): Likewise.
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2015-09-30 Nathan Sidwell <nathan@codesourcery.com>
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* config/nvptx/mkoffload.c (process): Change offload data format.
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@ -24118,13 +24118,13 @@ rs6000_emit_prologue (void)
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#define NOT_INUSE(R) do {} while (0)
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#endif
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if (DEFAULT_ABI == ABI_ELFv2)
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if (DEFAULT_ABI == ABI_ELFv2
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&& !TARGET_SINGLE_PIC_BASE)
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{
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cfun->machine->r2_setup_needed = df_regs_ever_live_p (TOC_REGNUM);
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/* With -mminimal-toc we may generate an extra use of r2 below. */
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if (!TARGET_SINGLE_PIC_BASE
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&& TARGET_TOC && TARGET_MINIMAL_TOC && get_pool_size () != 0)
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if (TARGET_TOC && TARGET_MINIMAL_TOC && get_pool_size () != 0)
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cfun->machine->r2_setup_needed = true;
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}
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@ -26800,7 +26800,8 @@ rs6000_output_mi_thunk (FILE *file, tree thunk_fndecl ATTRIBUTE_UNUSED,
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/* Ensure we have a global entry point for the thunk. ??? We could
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avoid that if the target routine doesn't need a global entry point,
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but we do not know whether this is the case at this point. */
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if (DEFAULT_ABI == ABI_ELFv2)
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if (DEFAULT_ABI == ABI_ELFv2
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&& !TARGET_SINGLE_PIC_BASE)
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cfun->machine->r2_setup_needed = true;
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/* Run just enough of rest_of_compilation to get the insns emitted.
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