| Run: | explore-bc8218b282-20261015-075519 |
| Kind: | fallback |
| Category: | legalize: G_INSERT_SUBVECTOR <vscale x 2 x s1>,<4 x s1> |
| Occurrences: | 13 in 2 configs, 2 test files |
| Snippet from: | known-fpclass.ll @vselect_both_nevernan via llvm-extract |
| Config: | -mtriple=riscv64 -mattr=+v,+f,+d -target-abi=lp64d |
| Local check: | reproduces at bc8218b282 |
| Compiler Explorer: | not uploaded (over --godbolt-limit or disabled) |
define <4 x i1> @vselect_both_nevernan(<4 x i1> %cond, <4 x float> nofpclass(nan) %a, <4 x float> nofpclass(nan) %b) {
%sel = select <4 x i1> %cond, <4 x float> %a, <4 x float> %b
%class = call <4 x i1> @llvm.is.fpclass.v4f32(<4 x float> %sel, /* (nan) */ i32 3)
ret <4 x i1> %class
}
; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare <4 x i1> @llvm.is.fpclass.v4f32(<4 x float>, i32 immarg) #0
attributes #0 = { nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none) }
llc -mtriple=riscv64 -mattr=+v,+f,+d -target-abi=lp64d -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o - llc -mtriple=riscv64 -mattr=+v,+f,+d -target-abi=lp64d -global-isel=0 snippet.ll -o -
remark: <unknown>:0:0: unable to legalize instruction: %9:_(<vscale x 2 x s1>) = G_INSERT_SUBVECTOR %8:_, %7:_(<4 x s1>), 0 (in function: vselect_both_nevernan) warning: Instruction selection used fallback path for vselect_both_nevernan
| Input | Function | Config |
|---|---|---|
| combine-is_fpclass.ll | fneg_vec_not_negative | -mtriple=riscv64 -mattr=+v,+f,+d |
| combine-is_fpclass.ll | fneg_vec_not_positive | -mtriple=riscv64 -mattr=+v,+f,+d |
| combine-is_fpclass.ll | fneg_vec_unknown_sign | -mtriple=riscv64 -mattr=+v,+f,+d |
| combine-is_fpclass.ll | insert_subvec_fixed_both_isneg_false | -mtriple=riscv64 -mattr=+v,+f,+d |
| combine-is_fpclass.ll | insert_subvec_fixed_pos_base_neg_sub_isneg_unknown | -mtriple=riscv64 -mattr=+v,+f,+d |
| combine-is_fpclass.ll | insert_subvec_fixed_pos_base_pos_sub_isneg_false | -mtriple=riscv64 -mattr=+v,+f,+d |
| known-fpclass.ll | vselect_both_nevernan | -mtriple=riscv64 -mattr=+v,+f,+d -target-abi=lp64d |
| known-fpclass.ll | vselect_both_neverzero | -mtriple=riscv64 -mattr=+v,+f,+d -target-abi=lp64d |
| combine-is_fpclass.1dc3fb9f27.ll (mutant of combine-is_fpclass.ll) | fneg_vec_not_negative | -mtriple=riscv64 -mattr=+v,+f,+d |
| combine-is_fpclass.1dc3fb9f27.ll (mutant of combine-is_fpclass.ll) | insert_subvec_fixed_pos_base_neg_sub_isneg_unknown | -mtriple=riscv64 -mattr=+v,+f,+d |
| combine-is_fpclass.cb336455ff.ll (mutant of combine-is_fpclass.ll) | insert_subvec_fixed_pos_base_pos_sub_isneg_false | -mtriple=riscv64 -mattr=+v,+f,+d |
| known-fpclass.1678209993.ll (mutant of known-fpclass.ll) | vselect_both_nevernan | -mtriple=riscv64 -mattr=+v,+f,+d -target-abi=lp64d |
| known-fpclass.dc070d2e87.ll (mutant of known-fpclass.ll) | vselect_both_nevernan | -mtriple=riscv64 -mattr=+v,+f,+d -target-abi=lp64d |
Generated 2026-10-15 08:05 UTC.