fallback: legalize: G_EXTRACT_VECTOR_ELT s8,<4 x s8>,s64
| Run: | explore-bc8218b282-20261015-075519 |
| Kind: | fallback |
| Category: | legalize: G_EXTRACT_VECTOR_ELT s8,<4 x s8>,s64 |
| Occurrences: | 2 in 1 configs, 1 test files |
| Snippet from: | rvp-simd-32.ll @test_extract_vector_8 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 i8 @test_extract_vector_8(<4 x i8> %a) {
%extracted = extractelement <4 x i8> %a, i32 0
ret i8 %extracted
}
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: %3:_(s8) = G_EXTRACT_VECTOR_ELT %0:_(<4 x s8>), %4:_(s64) (in function: test_extract_vector_8)
warning: Instruction selection used fallback path for test_extract_vector_8
Occurrences (2):
| Input | Function | Config |
|---|
| rvp-simd-32.ll | test_extract_vector_8 | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
| rvp-simd-32.ll | test_extract_vector_8_elem1 | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
Generated 2026-10-15 08:05 UTC.