fallback: legalize: G_UMULH s128
| Run: | explore-04ca53e65f-20261014-114124 |
| Kind: | fallback |
| Category: | legalize: G_UMULH s128 |
| Occurrences: | 4 in 3 configs, 2 test files |
| Snippet from: | bitint-fp-conv-200.ll @test_float_to_bitint_200 via llvm-extract |
| Config: | -mtriple=riscv64 -verify-machineinstrs |
| Local check: | reproduces at 04ca53e65f |
| Compiler Explorer: | not uploaded (over --godbolt-limit or disabled) |
Snippet:
; Function Attrs: nounwind
define void @test_float_to_bitint_200(ptr %in, ptr %out) #0 {
%1 = load float, ptr %in, align 4
%2 = fptosi float %1 to i200
store i200 %2, ptr %out, align 8
ret void
}
attributes #0 = { nounwind }
Reproduce:
llc -mtriple=riscv64 -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -verify-machineinstrs -global-isel=0 snippet.ll -o -
Local llc output:
remark: <unknown>:0:0: unable to legalize instruction: %77:_(s128) = G_UMULH %72:_, %74:_ (in function: test_float_to_bitint_200)
warning: Instruction selection used fallback path for test_float_to_bitint_200
Occurrences (4):
| Input | Function | Config |
|---|
| bitint-fp-conv-200.ll | test_float_to_bitint_200 | -mtriple=riscv64 -verify-machineinstrs |
| umulh.ll | umulh_i128 | -mtriple=riscv32 |
| umulh.ll | umulh_i128 | -mtriple=riscv64 |
| bitint-fp-conv-200.11242d29ec.ll (mutant of bitint-fp-conv-200.ll) | test_float_to_bitint_200 | -mtriple=riscv64 -verify-machineinstrs |
Generated 2026-10-15 08:05 UTC.