fallback: legalize: G_INTRINSIC s64,<4 x s16>
| Run: | main-bc8218b282-20261015-074651 |
| Kind: | fallback |
| Category: | legalize: G_INTRINSIC s64,<4 x s16> |
| Occurrences: | 5 in 1 configs, 1 test files |
| Snippet from: | rvp-simd-64.ll @test_predsum_i16x4_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_i16x4_i64(<4 x i16> %a, i64 %b) {
%res = call i64 @llvm.riscv.predsum.i64.v4i16(<4 x i16> %a, i64 %b)
ret i64 %res
}
; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.riscv.predsum.i64.v4i16(<4 x i16>, 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:_(<4 x s16>), %1:_(s64) (in function: test_predsum_i16x4_i64)
warning: Instruction selection used fallback path for test_predsum_i16x4_i64
Occurrences (5):
| Input | Function | Config |
|---|
| rvp-simd-64.ll | test_predsum_i16x4_i64 | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
| rvp-simd-64.ll | test_predsumu_u16x4_u64 | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
| rvp-simd-64.ll | test_pm4add_v4i16_i64 | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
| rvp-simd-64.ll | test_pm4addu_v4i16_i64 | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
| rvp-simd-64.ll | test_pm4addsu_v4i16_i64 | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
Generated 2026-10-15 08:05 UTC.