[Bug rtl-optimization/115495] [15 Regression] ICE in smallest_mode_for_size, at stor-layout.cc:356 during combine on RISC-V rv64gcv_zvl256b at -O3 since r15-1042-g68b0742a49d

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115495 Patrick O'Neill changed: What|Removed |Added Summary|[15 Regression] ICE in |[15 Regression] ICE in

[Bug rtl-optimization/115495] [15 Regression] ICE in smallest_mode_for_size, at stor-layout.cc:356 during combine on RISC-V rv64gcv_zvl256b at -O3

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115495 --- Comment #4 from Patrick O'Neill --- This failure also appears when compiling glibc 2.39 with rv64gcv_zvl512b and rv64gcv_zvl1024b.

[Bug rtl-optimization/115495] [15 Regression] ICE in smallest_mode_for_size, at stor-layout.cc:356 during combine on RISC-V rv64gcv_zvl256b at -O3

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115495 --- Comment #3 from Robin Dapp --- At first it looked very weird that we need 50 (or so) instructions to expand ;; MEM [(short int *)] = vect_cst__21; but then I realized that all the hoops we jump through are due to possible misalignment.

[Bug rtl-optimization/115495] [15 Regression] ICE in smallest_mode_for_size, at stor-layout.cc:356 during combine on RISC-V rv64gcv_zvl256b at -O3

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115495 --- Comment #2 from Andrew Pinski --- Note in most cases `(subreg:DI (reg:V16HI 139 [ vect_cst__21 ]) 0) (const_int 16 [0x10])` would normally be a `vec_select` so I am shock that it is using a subreg here ...

[Bug rtl-optimization/115495] [15 Regression] ICE in smallest_mode_for_size, at stor-layout.cc:356 during combine on RISC-V rv64gcv_zvl256b at -O3

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115495 Andrew Pinski changed: What|Removed |Added Ever confirmed|0 |1 Status|UNCONFIRMED

[Bug rtl-optimization/115495] [15 Regression] ICE in smallest_mode_for_size, at stor-layout.cc:356 during combine on RISC-V rv64gcv_zvl256b at -O3

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115495 Andrew Pinski changed: What|Removed |Added Target Milestone|--- |15.0 CC|