fallback: translate: call llvm.is.fpclass.nxv4f32
| Run: | main-04ca53e65f-20261014-105623 |
| Kind: | fallback |
| Category: | translate: call llvm.is.fpclass.nxv4f32 |
| Occurrences: | 7 in 2 configs, 2 test files |
| Snippet from: | combine-is_fpclass.ll @splat_constant_is_pos_normal via llvm-extract |
| Config: | -mtriple=riscv64 -mattr=+v,+f,+d |
| Local check: | reproduces at 04ca53e65f |
| Compiler Explorer: | not uploaded (over --godbolt-limit or disabled) |
Snippet:
define <vscale x 4 x i1> @splat_constant_is_pos_normal() {
%res = call <vscale x 4 x i1> @llvm.is.fpclass.nxv4f32(<vscale x 4 x float> splat (float 1.000000e+00), /* (psub) */ i32 128)
ret <vscale x 4 x i1> %res
}
; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare <vscale x 4 x i1> @llvm.is.fpclass.nxv4f32(<vscale x 4 x float>, i32 immarg) #0
attributes #0 = { nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none) }
Reproduce:
llc -mtriple=riscv64 -mattr=+v,+f,+d -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -mattr=+v,+f,+d -global-isel=0 snippet.ll -o -
Local llc output:
remark: <unknown>:0:0: unable to translate instruction: call llvm.is.fpclass.nxv4f32: ' %res = call <vscale x 4 x i1> @llvm.is.fpclass.nxv4f32(<vscale x 4 x float> splat (float 1.000000e+00), /* (psub) */ i32 128)' (in function: splat_constant_is_pos_normal)
warning: Instruction selection used fallback path for splat_constant_is_pos_normal
Occurrences (7):
| Input | Function | Config |
|---|
| combine-is_fpclass.ll | splat_constant_is_pos_normal | -mtriple=riscv64 -mattr=+v,+f,+d |
| combine-is_fpclass.ll | splat_constant_isnan_false | -mtriple=riscv64 -mattr=+v,+f,+d |
| known-fpclass.ll | test_full_pinf_vs_pinf | -mtriple=riscv64 -mattr=+v,+f,+d -target-abi=lp64d |
| known-fpclass.ll | test_partial_nan_from_nan_pinf | -mtriple=riscv64 -mattr=+v,+f,+d -target-abi=lp64d |
| known-fpclass.ll | test_partial_pinf_from_inf | -mtriple=riscv64 -mattr=+v,+f,+d -target-abi=lp64d |
| known-fpclass.ll | test_no_overlap_pinf_vs_nan | -mtriple=riscv64 -mattr=+v,+f,+d -target-abi=lp64d |
| known-fpclass.ll | test_no_overlap_nan_vs_pinf | -mtriple=riscv64 -mattr=+v,+f,+d -target-abi=lp64d |
Generated 2026-10-15 08:05 UTC.