fallback: legalize: G_CLMUL s96
| Run: | main-04ca53e65f-20261014-105623 |
| Kind: | fallback |
| Category: | legalize: G_CLMUL s96 |
| Occurrences: | 10 in 10 configs, 1 test files |
| Snippet from: | clmul.ll @clmul_i96 via llvm-extract |
| Config: | -mtriple=riscv32 -mattr=+m -verify-machineinstrs |
| Local check: | reproduces at 04ca53e65f |
| Compiler Explorer: | not uploaded (over --godbolt-limit or disabled) |
Snippet:
define i96 @clmul_i96(i96 %x, i96 %y) {
%a = call i96 @llvm.clmul.i96(i96 %x, i96 %y)
ret i96 %a
}
; Function Attrs: nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none)
declare i96 @llvm.clmul.i96(i96, i96) #0
attributes #0 = { nocallback nocreateundeforpoison nofree nosync nounwind speculatable willreturn memory(none) }
Reproduce:
llc -mtriple=riscv32 -mattr=+m -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+m -verify-machineinstrs -global-isel=0 snippet.ll -o -
Local llc output:
remark: <unknown>:0:0: unable to legalize instruction: %5:_(s96) = G_CLMUL %0:_, %1:_ (in function: clmul_i96)
warning: Instruction selection used fallback path for clmul_i96
Occurrences (10):
| Input | Function | Config |
|---|
| clmul.ll | clmul_i96 | -mtriple=riscv32 -mattr=+m -verify-machineinstrs |
| clmul.ll | clmul_i96 | -mtriple=riscv32 -mattr=+m,+zbc -verify-machineinstrs |
| clmul.ll | clmul_i96 | -mtriple=riscv32 -mattr=+m,+zbs -verify-machineinstrs |
| clmul.ll | clmul_i96 | -mtriple=riscv32 -mattr=+m,+zvbc -verify-machineinstrs |
| clmul.ll | clmul_i96 | -mtriple=riscv32 -verify-machineinstrs |
| clmul.ll | clmul_i96 | -mtriple=riscv64 -mattr=+m -verify-machineinstrs |
| clmul.ll | clmul_i96 | -mtriple=riscv64 -mattr=+m,+zbc -verify-machineinstrs |
| clmul.ll | clmul_i96 | -mtriple=riscv64 -mattr=+m,+zbs -verify-machineinstrs |
| clmul.ll | clmul_i96 | -mtriple=riscv64 -mattr=+m,+zvbc -verify-machineinstrs |
| clmul.ll | clmul_i96 | -mtriple=riscv64 -verify-machineinstrs |
Generated 2026-10-15 08:05 UTC.