[Bug c++/83911] [6/7/8 Regression] ICE with target attribute on constructor in gimplify_expr at gimplify.c:11321

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83911

--- Comment #3 from Jason Merrill  ---
Author: jason
Date: Fri Mar 16 12:38:42 2018
New Revision: 258592

URL: https://gcc.gnu.org/viewcvs?rev=258592=gcc=rev
Log:
PR c++/83911 - ICE with multiversioned constructor.

* cp-gimplify.c (cp_genericize_r): Replace versioned function with
dispatchere here.
* call.c (build_over_call): Not here.
PR c++/83911 - ICE with multiversioned constructor.

Added:
trunk/gcc/testsuite/g++.dg/ext/mv27.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/cp/cp-gimplify.c

[Bug c++/83911] [6/7/8 Regression] ICE with target attribute on constructor in gimplify_expr at gimplify.c:11321

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83911

Richard Biener  changed:

   What|Removed |Added

   Priority|P3  |P2
   Target Milestone|--- |6.5

[Bug c++/83911] [6/7/8 Regression] ICE with target attribute on constructor in gimplify_expr at gimplify.c:11321

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83911

--- Comment #2 from Jason Merrill  ---
Created attachment 43445
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43445=edit
patch

The problem here is that we're substituting a dispatcher function for a
constructor, and the dispatcher function isn't marked as being a constructor. 
This seems like a general issue that the dispatcher lacks all language-specific
information that might be helpful, but in this specific instance it's easy
enough to copy DECL_CXX_CONSTRUCTOR_P.

[Bug c++/83911] [6/7/8 Regression] ICE with target attribute on constructor in gimplify_expr at gimplify.c:11321

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83911

Jason Merrill  changed:

   What|Removed |Added

 Status|NEW |ASSIGNED
 CC||jason at gcc dot gnu.org
   Assignee|unassigned at gcc dot gnu.org  |jason at gcc dot gnu.org

[Bug c++/83911] [6/7/8 Regression] ICE with target attribute on constructor in gimplify_expr at gimplify.c:11321

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83911

Martin Sebor  changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
  Known to work||4.9.4
   Keywords||ice-on-valid-code
   Last reconfirmed||2018-01-26
 CC||msebor at gcc dot gnu.org,
   ||rsandifo at gcc dot gnu.org
 Ever confirmed|0   |1
Summary|ICE with target attribute   |[6/7/8 Regression] ICE with
   |on constructor in   |target attribute on
   |gimplify_expr at|constructor in
   |gimplify.c:11321|gimplify_expr at
   ||gimplify.c:11321
  Known to fail||5.4.0, 6.4.0, 7.2.0, 8.0

--- Comment #1 from Martin Sebor  ---
Confirmed with GCC 5, 6, 7, and 8.  Bisection points to Richard's r210692
committed in gcc 4.10 (5.0).

GCC 8 abends with the following output:

gcc -O2 -S -Wall -Wextra pr83911.C
pr83911.C: In constructor ‘SimdFloat::SimdFloat(float)’:
pr83911.C:5:21: warning: unused parameter ‘x’ [-Wunused-parameter]
 SimdFloat(float x) {}
   ~~^
pr83911.C: In constructor ‘SimdFloat::SimdFloat(float)’:
pr83911.C:8:21: warning: unused parameter ‘x’ [-Wunused-parameter]
 SimdFloat(float x) {}
   ~~^
pr83911.C: In function ‘SimdFloat foo()’:
pr83911.C:13:12: internal compiler error: in
ix86_get_function_versions_dispatcher, at config/i386/i386.c:32432
 return 1;
^
0x13f2168 ix86_get_function_versions_dispatcher
/ssd/src/gcc/svn/gcc/config/i386/i386.c:32432
0x7e5a3c get_function_version_dispatcher(tree_node*)
/ssd/src/gcc/svn/gcc/cp/call.c:7479
0x7e7b1c build_over_call
/ssd/src/gcc/svn/gcc/cp/call.c:8191
0x7e3af0 convert_like_real
/ssd/src/gcc/svn/gcc/cp/call.c:6783
0x7e42c6 convert_like_real
/ssd/src/gcc/svn/gcc/cp/call.c:6909
0x7ee318 perform_implicit_conversion_flags(tree_node*, tree_node*, int, int)
/ssd/src/gcc/svn/gcc/cp/call.c:10574
0x9b6b5c convert_for_initialization(tree_node*, tree_node*, tree_node*, int,
impl_conv_rhs, tree_node*, int, int)
/ssd/src/gcc/svn/gcc/cp/typeck.c:8982
0x9b7bd4 check_return_expr(tree_node*, bool*)
/ssd/src/gcc/svn/gcc/cp/typeck.c:9372
0x97004f finish_return_stmt(tree_node*)
/ssd/src/gcc/svn/gcc/cp/semantics.c:890
0x8def99 cp_parser_jump_statement
/ssd/src/gcc/svn/gcc/cp/parser.c:12368
0x8dbf5c cp_parser_statement
/ssd/src/gcc/svn/gcc/cp/parser.c:10773
0x8dcbe1 cp_parser_statement_seq_opt
/ssd/src/gcc/svn/gcc/cp/parser.c:11218
0x8dcad7 cp_parser_compound_statement
/ssd/src/gcc/svn/gcc/cp/parser.c:11172
0x8ee1dd cp_parser_function_body
/ssd/src/gcc/svn/gcc/cp/parser.c:21712
0x8ee2e8 cp_parser_ctor_initializer_opt_and_function_body
/ssd/src/gcc/svn/gcc/cp/parser.c:21747
0x8f6245 cp_parser_function_definition_after_declarator
/ssd/src/gcc/svn/gcc/cp/parser.c:26648
0x8f606b cp_parser_function_definition_from_specifiers_and_declarator
/ssd/src/gcc/svn/gcc/cp/parser.c:26565
0x8ea718 cp_parser_init_declarator
/ssd/src/gcc/svn/gcc/cp/parser.c:19436
0x8e02b3 cp_parser_simple_declaration
/ssd/src/gcc/svn/gcc/cp/parser.c:13009
0x8dfe48 cp_parser_block_declaration
/ssd/src/gcc/svn/gcc/cp/parser.c:12827
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