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[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
This commit is contained in:
Alan Modra 2015-10-01 07:49:18 +09:30 committed by Alan Modra
parent cc3cd79bc2
commit 7dc396e20f
2 changed files with 11 additions and 4 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2015-10-01 Alan Modra <amodra@gmail.com>
* config/rs6000/rs6000.c (rs6000_emit_prologue): Don't set
r2_setup_needed when TARGET_SINGLE_PIC_BASE.
(rs6000_output_mi_thunk): Likewise.
2015-09-30 Nathan Sidwell <nathan@codesourcery.com>
* config/nvptx/mkoffload.c (process): Change offload data format.

9
gcc/config/rs6000/rs6000.c
View File

@ -24118,13 +24118,13 @@ rs6000_emit_prologue (void)
#define NOT_INUSE(R) do {} while (0)
#endif
if (DEFAULT_ABI == ABI_ELFv2)
if (DEFAULT_ABI == ABI_ELFv2
&& !TARGET_SINGLE_PIC_BASE)
{
cfun->machine->r2_setup_needed = df_regs_ever_live_p (TOC_REGNUM);
/* With -mminimal-toc we may generate an extra use of r2 below. */
if (!TARGET_SINGLE_PIC_BASE
&& TARGET_TOC && TARGET_MINIMAL_TOC && get_pool_size () != 0)
if (TARGET_TOC && TARGET_MINIMAL_TOC && get_pool_size () != 0)
cfun->machine->r2_setup_needed = true;
}
@ -26800,7 +26800,8 @@ rs6000_output_mi_thunk (FILE *file, tree thunk_fndecl ATTRIBUTE_UNUSED,
/* Ensure we have a global entry point for the thunk. ??? We could
avoid that if the target routine doesn't need a global entry point,
but we do not know whether this is the case at this point. */
if (DEFAULT_ABI == ABI_ELFv2)
if (DEFAULT_ABI == ABI_ELFv2
&& !TARGET_SINGLE_PIC_BASE)
cfun->machine->r2_setup_needed = true;
/* Run just enough of rest_of_compilation to get the insns emitted.