fallback: legalize: G_CTLZ_ZERO_POISON s64,s129
| Run: | explore-bc8218b282-20261015-075519 |
| Kind: | fallback |
| Category: | legalize: G_CTLZ_ZERO_POISON s64,s129 |
| Occurrences: | 3 in 1 configs, 1 test files |
| Snippet from: | idiv_large.ll @udiv_i129 via llvm-extract |
| Config: | -mtriple=riscv64 |
| Local check: | reproduces at bc8218b282 |
| Compiler Explorer: | not uploaded (over --godbolt-limit or disabled) |
Snippet:
; Function Attrs: nounwind
define i129 @udiv_i129(i129 %x, i129 %y) #0 {
%res = udiv i129 %x, %y
ret i129 %res
}
attributes #0 = { nounwind }
Reproduce:
llc -mtriple=riscv64 -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -global-isel=0 snippet.ll -o -
Local llc output:
remark: <unknown>:0:0: unable to legalize instruction: %1104:_(s64) = G_CTLZ_ZERO_POISON %6:_(s129) (in function: udiv_i129)
warning: Instruction selection used fallback path for udiv_i129
Occurrences (3):
| Input | Function | Config |
|---|
| idiv_large.ll | udiv_i129 | -mtriple=riscv64 |
| idiv_large.0c6e4bb600.ll (mutant of idiv_large.ll) | udiv_i129 | -mtriple=riscv64 |
| idiv_large.83018cbcd8.ll (mutant of idiv_large.ll) | udiv_i129 | -mtriple=riscv64 |
Generated 2026-10-15 08:05 UTC.