https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102059
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |linkw at gcc dot gnu.org
Status|ASSIGNED |NEW
Assignee|marxin at gcc dot gnu.org |unassigned at gcc dot
gnu.org
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
So what happens in LTO mode: rs6000_can_inline_p is called with:
#0 rs6000_can_inline_p (caller=<function_decl 0x7ffff7427800 gemmMMA>,
callee=<function_decl 0x7ffff7433400 bmask>) at
/home/marxin/Programming/gcc/gcc/config/rs6000/rs6000.c:25035
#1 0x0000000002529129 in can_inline_edge_p (e=<cgraph_edge* 0x7ffff744d548
(<cgraph_node * 0x7ffff75bbaa0 "gemmMMA"/9> -> <cgraph_node * 0x7ffff75bbcc0
"bmask"/11>)>, report=true, early=true) at
/home/marxin/Programming/gcc/gcc/ipa-inline.c:381
#2 0x000000000252a48a in can_early_inline_edge_p (e=<cgraph_edge*
0x7ffff744d548 (<cgraph_node * 0x7ffff75bbaa0 "gemmMMA"/9> -> <cgraph_node *
0x7ffff75bbcc0 "bmask"/11>)>) at
/home/marxin/Programming/gcc/gcc/ipa-inline.c:646
#3 0x000000000253135a in inline_always_inline_functions (node=<cgraph_node *
0x7ffff75bbaa0 "gemmMMA"/9>) at
/home/marxin/Programming/gcc/gcc/ipa-inline.c:2838
The following condition is false:
/* The callee's options must be a subset of the caller's options, i.e.
a vsx function may inline an altivec function, but a no-vsx function
must not inline a vsx function. However, for those options that the
callee has explicitly enabled or disabled, then we must enforce that
the callee's and caller's options match exactly; see PR70010. */
>25062 if (((caller_isa & callee_isa) == callee_isa)
because:
(gdb) p /x (caller_isa & callee_isa) ^ callee_isa
$3 = 0x2000020000
which are the following masks:
#define OPTION_MASK_HTM (HOST_WIDE_INT_1U << 17)
#define OPTION_MASK_P8_FUSION (HOST_WIDE_INT_1U << 37)
So looking at the condition, callers options are not subset.
Which is caused by g:82800987cb3b22427a8799b3e8491eff496724b9
commit 82800987cb3b22427a8799b3e8491eff496724b9
Author: Kewen Lin <li...@linux.ibm.com>
Date: Wed Dec 2 01:55:34 2020 -0600
rs6000: Disable HTM for Power10 and later by default
Power ISA 3.1 has dropped transactional memory support, this patch
is to disable HTM feature for power10 and later by default.
Bootstrapped/regtested on powerpc64le-linux-gnu P8 and P10.
gcc/ChangeLog:
* config/rs6000/rs6000.c (rs6000_option_override_internal):
Use OPTION_MASK_DIRECT_MOVE for Power8 target_enable instead
of OPTION_MASK_HTM.
* config/rs6000/rs6000-cpus.def (ISA_2_7_MASKS_SERVER):
Remove OPTION_MASK_HTM.
(RS6000_CPU): Add OPTION_MASK_HTM to power8, power9 and
powerpc64le entries.
@Kewen: Can you please take a look?
