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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/95493] [10 Regression] test for vector members apparently reordered with assignment to vector members since r10-7523-gb90061c6ec090c6b Date: Tue, 16 Jun 2020 12:58:26 +0000 [thread overview] Message-ID: <bug-95493-4-j51o9R96Il@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-95493-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95493 --- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- This also fixes a regression introduced by: alias.c (ao_ref_from_mem): Move stack-slot sharing rewrite ... 2019-05-22 Richard Biener <rguenther@suse.de> * alias.c (ao_ref_from_mem): Move stack-slot sharing rewrite ... * emit-rtl.c (set_mem_attributes_minus_bitpos): ... here. From-SVN: r271510 See https://gcc.gnu.org/pipermail/gcc-help/2020-June/139060.html which has the following testcase (modified by me to abort instead of just print things out): #include <array> #include <iostream> struct Point { std::array<int, 3> array; Point(int x, int y, int z) : array{x, y, z} {} Point(const Point & other) : array{other.array} {} // OK if commented //Point(const Point &) = default; // OK //Point(Point && other) = default; // OK int operator[] (std::size_t i) const { return array[i]; } int& operator[] (std::size_t i) { return array[i]; } }; //using Point = std::array<int, 3>; // OK struct Cell { Point point; Cell(Point const& pt) : point(pt) {} int operator[] (std::size_t i) const { return point[i]; } int& operator[] (std::size_t i) { return point[i]; } }; //using Cell = Point; // OK std::ostream & operator<< (std::ostream & out, Cell const& object) //std::ostream & operator<< (std::ostream & out, Cell object) // Fails with f2 too { for ( std::size_t i = 0; i < 3; ++i ) out << object[ i ] << " "; return out; } struct DirIterator { std::size_t dir; Cell cell; DirIterator(Cell c) : dir(0), cell(c) { find(); // OK if commented } void find() { //while (dir < 3) // Fails with f2 too while (dir < 3 && (cell[dir] % 2) == 0) ++dir; } }; Cell uIncident(Cell c, std::size_t k) //Cell uIncident(Cell& c, std::size_t k) // OK { --c[k]; return c; } Cell uSpel(Point p) { for (std::size_t i = 0; i < 3; ++i) p[i] += p[i] + 1; return Cell(p); } int main () { Cell c = uSpel(Point{0, 0, 0}); // Fails //Cell c( Point(1, 1, 1) ); // OK auto q = DirIterator( c ); Cell f1 = uIncident( c, q.dir ); // Fails //Cell f1 = uIncident( c, 0 ); // OK Cell f2 = f1; // f2 is the right cell that f1 should be std::cout << "q.dir = " << q.dir << " ; f1 = " << f1 << " ; f2 = " << f2 << std::endl; //std::cout << "q.dir = " << q.dir << " ; f1 = " << f1[0] << " " << f1[1] << " " << f1[2] << " ; f2 = " << f2[0] << " " << f2[1] << " " << f2[2] << std::endl; // OK for (int i = 0; i < 3; ++i) if (f1[i] != f2[i]) __builtin_abort(); return 0; }
next prev parent reply other threads:[~2020-06-16 12:58 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-06-03 7:49 [Bug tree-optimization/95493] New: [10 Regression] test for vector members apparently reordered with assignment to vector members kretz at kde dot org 2020-06-03 8:15 ` [Bug tree-optimization/95493] [10/11 Regression] test for vector members apparently reordered with assignment to vector members since r10-7523-gb90061c6ec090c6b marxin at gcc dot gnu.org 2020-06-03 8:20 ` [Bug middle-end/95493] " pinskia at gcc dot gnu.org 2020-06-03 9:51 ` [Bug rtl-optimization/95493] " rguenth at gcc dot gnu.org 2020-06-03 10:00 ` rguenth at gcc dot gnu.org 2020-06-03 11:15 ` rguenth at gcc dot gnu.org 2020-06-05 6:35 ` cvs-commit at gcc dot gnu.org 2020-06-05 6:36 ` [Bug rtl-optimization/95493] [10 " rguenth at gcc dot gnu.org 2020-06-16 11:57 ` rguenth at gcc dot gnu.org 2020-06-16 12:58 ` redi at gcc dot gnu.org [this message] 2020-06-16 22:15 ` cvs-commit at gcc dot gnu.org 2020-06-19 12:08 ` kretz at kde dot org 2020-06-19 12:29 ` rguenth at gcc dot gnu.org 2020-06-23 13:31 ` cvs-commit at gcc dot gnu.org 2020-06-23 13:31 ` rguenth at gcc dot gnu.org
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