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[Darwin, PPC] Do not use longcall for 64b code. 

The linker [ld64] that supports 64Bit does not need the JBSR longcall
optimisation, and will not work with the most generic case (where the
symbol is undefined external, but there is no symbl stub).  So switch
the longcall option off.  ld64 will generate branch islands as needed.

2019-06-27  Iain Sandoe  <iain@sandoe.co.uk>

	* config/rs6000/rs6000.c (darwin_rs6000_override_options): Do not
	use longcall for 64b code.

From-SVN: r272758
This commit is contained in:
Iain Sandoe 2019-06-27 18:56:53 +00:00 committed by Iain Sandoe
parent c2fe65930a
commit 085efec58f
2 changed files with 14 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2019-06-27 Iain Sandoe <iain@sandoe.co.uk>
* config/rs6000/rs6000.c (darwin_rs6000_override_options): Do not
use longcall for 64b code.
2019-06-27 Aaron Sawdey <acsawdey@linux.ibm.com>
* builtins.c (get_memory_rtx): Fix comment.

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

@ -3418,6 +3418,15 @@ darwin_rs6000_override_options (void)
rs6000_isa_flags |= OPTION_MASK_POWERPC64;
warning (0, "%qs requires PowerPC64 architecture, enabling", "-m64");
}
/* The linkers [ld64] that support 64Bit do not need the JBSR longcall
optimisation, and will not work with the most generic case (where the
symbol is undefined external, but there is no symbl stub). */
if (TARGET_64BIT)
rs6000_default_long_calls = 0;
/* ld_classic is (so far) still used for kernel (static) code, and supports
the JBSR longcall / branch islands. */
if (flag_mkernel)
{
rs6000_default_long_calls = 1;