fallback: legalize: G_FMAXIMUM s128
| Run: | main-bc8218b282-20261015-074651 |
| Kind: | fallback |
| Category: | legalize: G_FMAXIMUM s128 |
| Occurrences: | 6 in 2 configs, 1 test files |
| Snippet from: | fp128.ll @fmaximum via llvm-extract |
| Config: | -mtriple=riscv32 -verify-machineinstrs |
| Local check: | reproduces at bc8218b282 |
| Compiler Explorer: | not uploaded (over --godbolt-limit or disabled) |
Snippet:
define fp128 @fmaximum(fp128 %x, fp128 %y) {
%a = call fp128 @llvm.maximum.f128(fp128 %x, fp128 %y)
ret fp128 %a
}
; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare fp128 @llvm.maximum.f128(fp128, fp128) #0
attributes #0 = { nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none) }
Reproduce:
llc -mtriple=riscv32 -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -verify-machineinstrs -global-isel=0 snippet.ll -o -
Local llc output:
remark: <unknown>:0:0: unable to legalize instruction: %5:_(s128) = G_FMAXIMUM %0:_, %1:_ (in function: fmaximum)
warning: Instruction selection used fallback path for fmaximum
Occurrences (6):
| Input | Function | Config |
|---|
| fp128.ll | fmaximum | -mtriple=riscv32 -verify-machineinstrs |
| fp128.ll | fmaximum | -mtriple=riscv64 -verify-machineinstrs |
| fp128.06ebecfe2a.ll (mutant of fp128.ll) | fmaximum | -mtriple=riscv32 -verify-machineinstrs |
| fp128.1518aa6195.ll (mutant of fp128.ll) | fmaximum | -mtriple=riscv64 -verify-machineinstrs |
| fp128.44d7a83b0d.ll (mutant of fp128.ll) | fmaximum | -mtriple=riscv64 -verify-machineinstrs |
| fp128.f4d329a7b1.ll (mutant of fp128.ll) | fmaximum | -mtriple=riscv64 -verify-machineinstrs |
Generated 2026-10-15 08:05 UTC.