fallback: legalize: G_INTRINSIC s64,<8 x s8>
| Run: | explore-bc8218b282-20261015-075519 |
| Kind: | fallback |
| Category: | legalize: G_INTRINSIC s64,<8 x s8> |
| Occurrences: | 4 in 1 configs, 1 test files |
| Snippet from: | rvp-simd-64.ll @test_predsum_i8x8_i64 via llvm-extract |
| Config: | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
| Local check: | reproduces at bc8218b282 |
| Compiler Explorer: | not uploaded (over --godbolt-limit or disabled) |
Snippet:
define i64 @test_predsum_i8x8_i64(<8 x i8> %a, i64 %b) {
%res = call i64 @llvm.riscv.predsum.i64.v8i8(<8 x i8> %a, i64 %b)
ret i64 %res
}
; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.riscv.predsum.i64.v8i8(<8 x i8>, i64) #0
attributes #0 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
Reproduce:
llc -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs -global-isel=0 snippet.ll -o -
Local llc output:
remark: <unknown>:0:0: unable to legalize instruction: %2:_(s64) = G_INTRINSIC intrinsic(@llvm.riscv.predsum), %0:_(<8 x s8>), %1:_(s64) (in function: test_predsum_i8x8_i64)
warning: Instruction selection used fallback path for test_predsum_i8x8_i64
Occurrences (4):
| Input | Function | Config |
|---|
| rvp-simd-64.ll | test_predsum_i8x8_i64 | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
| rvp-simd-64.ll | test_predsumu_u8x8_u64 | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
| rvp-simd-64.ll | test_pabdsumu_u8x8_u64 | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
| rvp-simd-64.ll | test_pabdsumau_u8x8_u64 | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
Generated 2026-10-15 08:05 UTC.