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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/55359] New: [4.8 Regression] ICE in simplify_subreg accessing an unaligned subvector Date: Fri, 16 Nov 2012 19:17:00 -0000 [thread overview] Message-ID: <bug-55359-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55359 Bug #: 55359 Summary: [4.8 Regression] ICE in simplify_subreg accessing an unaligned subvector Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned@gcc.gnu.org ReportedBy: glisse@gcc.gnu.org I am not quite sure if this code is legal. I noticed it first with a BIT_FIELD_REF (generated by a local patch), but it also happens with a MEM_REF. The code generated by 4.7 seems correct, even if it isn't optimal. $ cat s.c #include <x86intrin.h> __m128d f(__m256d x){ return *((__m128d*)((double*)&x+1)); } $ gcc s.c -mavx2 -S -O2 s.c: In function 'f': s.c:4:3: internal compiler error: in simplify_subreg, at simplify-rtx.c:5688 return *((__m128d*)((double*)&x+1)); ^ 0x9052f6 simplify_subreg(machine_mode, rtx_def*, machine_mode, unsigned int) /data/repos/gcc/pristine/gcc/simplify-rtx.c:5688 0x90b8bd simplify_gen_subreg(machine_mode, rtx_def*, machine_mode, unsigned int) /data/repos/gcc/pristine/gcc/simplify-rtx.c:5903 0x6ec7e8 extract_bit_field_1 /data/repos/gcc/pristine/gcc/expmed.c:1482 0x6ecda3 extract_bit_field(rtx_def*, unsigned long, unsigned long, int, bool, rtx_def*, machine_mode, machine_mode) /data/repos/gcc/pristine/gcc/expmed.c:1711 0x6fa77e expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**) /data/repos/gcc/pristine/gcc/expr.c:10006 0x6fb505 expand_expr /data/repos/gcc/pristine/gcc/expr.h:444 0x6fb505 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**) /data/repos/gcc/pristine/gcc/expr.c:9614 0x6fb623 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**) /data/repos/gcc/pristine/gcc/expr.c:9179 0x9152a8 expand_expr /data/repos/gcc/pristine/gcc/expr.h:444 0x9152a8 expand_return(tree_node*) /data/repos/gcc/pristine/gcc/stmt.c:1546 0x635273 expand_gimple_stmt_1 /data/repos/gcc/pristine/gcc/cfgexpand.c:2082 0x635273 expand_gimple_stmt /data/repos/gcc/pristine/gcc/cfgexpand.c:2204 0x636c82 expand_gimple_basic_block /data/repos/gcc/pristine/gcc/cfgexpand.c:3978 0x639aee gimple_expand_cfg /data/repos/gcc/pristine/gcc/cfgexpand.c:4497
next reply other threads:[~2012-11-16 19:17 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-11-16 19:17 glisse at gcc dot gnu.org [this message] 2012-11-19 11:40 ` [Bug middle-end/55359] " jakub at gcc dot gnu.org 2012-11-19 19:00 ` rsandifo at gcc dot gnu.org 2012-11-19 19:11 ` jakub at gcc dot gnu.org 2012-11-19 19:14 ` rsandifo at gcc dot gnu.org 2012-11-19 23:28 ` rsandifo at gcc dot gnu.org 2012-11-19 23:29 ` rsandifo at gcc dot gnu.org
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