fallback: legalize: G

fallback: legalize: G_OR <4 x s16>

Run:	main-04ca53e65f-20261014-105623
Kind:	fallback
Category:	legalize: G_OR <4 x s16>
Occurrences:	9 in 6 configs, 3 test files
Snippet from:	rvp-simd-64.ll @test_or_h 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 <4 x i16> @test_or_h(<4 x i16> %a, <4 x i16> %b) {
  %res = or <4 x i16> %a, %b
  ret <4 x i16> %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:_(<4 x s16>) = G_OR %0:_, %1:_ (in function: test_or_h)
warning: Instruction selection used fallback path for test_or_h

Occurrences (9):

Input	Function	Config
rvp-bitreverse-zbkb.ll	test_bitreverse_v4i16	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb,+zbkb -verify-machineinstrs`
rvp-simd-64.ll	test_or_h	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs`
rvp-simd-64.ll	test_orn_h	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs`
rvp-simd-64.ll	test_bitreverse_v4i16	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs`
rvp-bitreverse-zbkb.c0a41849bc.ll (mutant of rvp-bitreverse-zbkb.ll)	test_bitreverse_v4i16	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb,+zbkb -verify-machineinstrs`
rvp-unaligned-load-store.18f72dbe5a.ll (mutant of rvp-unaligned-load-store.ll)	test_load_v4i16_align4	`-mtriple=riscv32 -mattr=+experimental-p,+unaligned-scalar-mem`
rvp-unaligned-load-store.4c20e9d2bd.ll (mutant of rvp-unaligned-load-store.ll)	test_load_v4i16_align4	`-mtriple=riscv64 -mattr=+experimental-p,+unaligned-scalar-mem`
rvp-unaligned-load-store.618747ceb4.ll (mutant of rvp-unaligned-load-store.ll)	test_load_v4i16_align4	`-mtriple=riscv32 -mattr=+experimental-p`
rvp-unaligned-load-store.fa1c96c3f0.ll (mutant of rvp-unaligned-load-store.ll)	test_load_v4i16_align4	`-mtriple=riscv64 -mattr=+experimental-p`

Generated 2026-10-15 08:05 UTC.