fallback: legalize: G

fallback: legalize: G_OR <8 x s8>

Run:	explore-04ca53e65f-20261014-114124
Kind:	fallback
Category:	legalize: G_OR <8 x s8>
Occurrences:	27 in 21 configs, 7 test files
Snippet from:	rvp-simd-64.ll @test_or_b via llvm-extract
Config:	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs`
Local check:	reproduces at 04ca53e65f
Compiler Explorer:	not uploaded (over --godbolt-limit or disabled)

Snippet:

define <8 x i8> @test_or_b(<8 x i8> %a, <8 x i8> %b) {
  %res = or <8 x i8> %a, %b
  ret <8 x i8> %res
}

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:_(<8 x s8>) = G_OR %0:_, %1:_ (in function: test_or_b)
warning: Instruction selection used fallback path for test_or_b

Occurrences (27):

Input	Function	Config
rvp-bitreverse-zbkb.ll	test_bitreverse_v8i8	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb,+zbkb -verify-machineinstrs`
rvp-simd-64.ll	test_or_b	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs`
rvp-simd-64.ll	test_orn_b	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs`
rvp-simd-64.ll	test_bitreverse_v8i8	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs`
abdu-neg.2d7274e33a.ll (mutant of abdu-neg.ll)	abd_ext_i32_i16	`-mtriple=riscv64`
abdu-neg.aa6dfb5d95.ll (mutant of abdu-neg.ll)	abd_ext_i32_i16	`-mtriple=riscv32`
abdu-neg.f5abd3d41f.ll (mutant of abdu-neg.ll)	abd_ext_i32_i16	`-mtriple=riscv64 -mattr=+zbb`
abdu-neg.fbcd327531.ll (mutant of abdu-neg.ll)	abd_ext_i32_i16	`-mtriple=riscv32 -mattr=+zbb`
calling-conv-ilp32-ilp32f-ilp32d-common.6ecee113e9.ll (mutant of calling-conv-ilp32-ilp32f-ilp32d-common.ll)	caller_large_scalars_exhausted_regs	`-mtriple=riscv32 -verify-machineinstrs -frame-pointer=all`
calling-conv-ilp32-ilp32f-ilp32d-common.7e54327452.ll (mutant of calling-conv-ilp32-ilp32f-ilp32d-common.ll)	caller_large_scalars_exhausted_regs	`-mtriple=riscv32 -verify-machineinstrs`
calling-conv-ilp32-ilp32f-ilp32d-common.8ef1d556eb.ll (mutant of calling-conv-ilp32-ilp32f-ilp32d-common.ll)	caller_large_scalars_exhausted_regs	`-mtriple=riscv32 -verify-machineinstrs -frame-pointer=all -mattr=+d -target-abi ilp32d`
calling-conv-ilp32-ilp32f-ilp32d-common.abb75e0fbd.ll (mutant of calling-conv-ilp32-ilp32f-ilp32d-common.ll)	caller_large_scalars_exhausted_regs	`-mtriple=riscv32 -verify-machineinstrs -frame-pointer=all -mattr=+f -target-abi ilp32f`
calling-conv-ilp32-ilp32f-ilp32d-common.b9ebfb13d6.ll (mutant of calling-conv-ilp32-ilp32f-ilp32d-common.ll)	caller_large_scalars_exhausted_regs	`-mtriple=riscv32 -mattr=+d -target-abi ilp32d -verify-machineinstrs`
calling-conv-ilp32-ilp32f-ilp32d-common.f0b268a97a.ll (mutant of calling-conv-ilp32-ilp32f-ilp32d-common.ll)	caller_large_scalars_exhausted_regs	`-mtriple=riscv32 -mattr=+f -target-abi ilp32f -verify-machineinstrs`
calling-conv-lp64-lp64f-lp64d-common.1713b0542f.ll (mutant of calling-conv-lp64-lp64f-lp64d-common.ll)	caller_large_scalars_exhausted_regs	`-mtriple=riscv64 -mattr=+d -target-abi lp64d -verify-machineinstrs`
calling-conv-lp64-lp64f-lp64d-common.3589fb689e.ll (mutant of calling-conv-lp64-lp64f-lp64d-common.ll)	caller_large_scalars_exhausted_regs	`-mtriple=riscv64 -verify-machineinstrs`
calling-conv-lp64-lp64f-lp64d-common.6f10e8b6ea.ll (mutant of calling-conv-lp64-lp64f-lp64d-common.ll)	caller_large_scalars_exhausted_regs	`-mtriple=riscv64 -mattr=+f -target-abi lp64f -verify-machineinstrs`
fold-addi-loadstore.0b56f12382.ll (mutant of fold-addi-loadstore.ll)	store_g_8	`-mtriple=riscv32 -verify-machineinstrs`
fold-addi-loadstore.241262357a.ll (mutant of fold-addi-loadstore.ll)	store_g_8	`-mtriple=riscv32 -verify-machineinstrs -code-model=medium`
fold-addi-loadstore.76eed7ac1c.ll (mutant of fold-addi-loadstore.ll)	store_g_8	`-mtriple=riscv32 -verify-machineinstrs -mattr=+xqcili<`
fold-addi-loadstore.887b4ecd23.ll (mutant of fold-addi-loadstore.ll)	store_g_8	`-mtriple=riscv64 -verify-machineinstrs`
fold-addi-loadstore.e50658df7a.ll (mutant of fold-addi-loadstore.ll)	store_g_8	`-mtriple=riscv64 -verify-machineinstrs -code-model=large`
fold-addi-loadstore.ece72d5335.ll (mutant of fold-addi-loadstore.ll)	store_g_8	`-mtriple=riscv64 -verify-machineinstrs -code-model=medium`
rvp-bitreverse-zbkb.2d840eb20a.ll (mutant of rvp-bitreverse-zbkb.ll)	test_bitreverse_v8i8	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb,+zbkb -verify-machineinstrs`
rvp-bitreverse-zbkb.78f9d504f7.ll (mutant of rvp-bitreverse-zbkb.ll)	test_bitreverse_v8i8	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb,+zbkb -verify-machineinstrs`
zicond-opts.2662feb007.ll (mutant of zicond-opts.ll)	and_icmp_ne_non_constant	`-mtriple=riscv32 -O2 -verify-machineinstrs -mattr=+b,+zicond`
zicond-opts.3de9f151b9.ll (mutant of zicond-opts.ll)	and_icmp_ne_non_constant	`-mtriple=riscv64 -O2 -verify-machineinstrs -mattr=+b,+zicond`

Generated 2026-10-15 08:05 UTC.