fallback: legalize: G

fallback: legalize: G_ADD <4 x s32>

Run:	explore-bc8218b282-20261015-075519
Kind:	fallback
Category:	legalize: G_ADD <4 x s32>
Occurrences:	490 in 434 configs, 45 test files
Snippet from:	calling-conv-p-ext-vector.ll @test_cc_v4i32 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 <4 x i32> @test_cc_v4i32(<4 x i32> %a, <4 x i32> %b) {
  %res = add <4 x i32> %a, %b
  ret <4 x i32> %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: %6:_(<4 x s32>) = G_ADD %0:_, %1:_ (in function: test_cc_v4i32)
warning: Instruction selection used fallback path for test_cc_v4i32

Occurrences (490) (first 50):

Input	Function	Config
calling-conv-p-ext-vector.ll	test_cc_v4i32	`-mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs`
add_shl_constant.541335b8cb.ll (mutant of add_shl_constant.ll)	add_shl_moreOneUse_sh2add	`-mtriple=riscv32 -mattr=+xandesperf`
add_shl_constant.7da0c42139.ll (mutant of add_shl_constant.ll)	add_shl_moreOneUse_sh2add	`-mtriple=riscv32 -mattr=+zba`
add_shl_constant.fa629b7eea.ll (mutant of add_shl_constant.ll)	add_shl_moreOneUse_sh2add	`-mtriple=riscv32`
andn-zext-lowmask.6c0959793a.ll (mutant of andn-zext-lowmask.ll)	andn_zext_lowmask_i64_i16	`-mtriple=riscv64 -mattr=+zbb -verify-machineinstrs`
andn-zext-lowmask.95ea6a27de.ll (mutant of andn-zext-lowmask.ll)	andn_zext_lowmask_i64_i16	`-mtriple=riscv64 -verify-machineinstrs`
andn-zext-lowmask.991e3d6832.ll (mutant of andn-zext-lowmask.ll)	andn_zext_lowmask_i64_i16	`-mtriple=riscv32 -mattr=+zbb -verify-machineinstrs`
andn-zext-lowmask.bda0ef1e1a.ll (mutant of andn-zext-lowmask.ll)	andn_zext_lowmask_i64_i16	`-mtriple=riscv32 -verify-machineinstrs`
attributes.005203d219.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+ziccrse`
attributes.008d6bd93b.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+zkn,+zkr,+zkt`
attributes.00f94f8c0e.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+zicond`
attributes.018028b08d.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+xcvbitmanip`
attributes.01bc75a3e2.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+experimental-zvqwbdota16i`
attributes.01ce930558.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+xcvsimd`
attributes.0275a1692e.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+zve64x -mattr=+zvbc`
attributes.0294c13b8d.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+supm`
attributes.03d7dc5a91.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+zvfbfwma`
attributes.05a068af95.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+experimental-ssip`
attributes.05b603fd4c.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+sscofpmf`
attributes.06cc04a6c4.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+ssqosid`
attributes.06d7c63e60.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+zve32x -mattr=+zvksed`
attributes.0713b7ad0a.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+experimental-smidctrl`
attributes.07868ef376.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+zknd`
attributes.07d60b77e0.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+ssnpm`
attributes.07e36c2d2a.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+zicclsm`
attributes.08b01b2943.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+shgatpa`
attributes.09807dd088.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+experimental-smnip`
attributes.0b145f7b8f.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+zicsr`
attributes.0bdbcb4346.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+zknd`
attributes.0d5041ece0.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+experimental-ssehv`
attributes.0dcaea6ebd.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+experimental-smpmpmt`
attributes.0ee7c72d1e.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+zfhmin`
attributes.0f5fb58880.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+rva20u64`
attributes.0f9e5ed0f3.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+svrsw60t59b`
attributes.101967097b.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+zbkb,+zbkc,+zbkx,+zksed,+zksh`
attributes.110f873de2.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+zve32x -mattr=+experimental-zvbc32e`
attributes.1154bfc05a.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+d`
attributes.11aa4018cd.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+zacas`
attributes.120c4b721b.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+experimental-smehv`
attributes.128a83571b.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+zve32x -mattr=+zvkg`
attributes.129637f39b.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+h`
attributes.13e8711304.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+ziccamoc`
attributes.13faecd963.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+experimental-xqccmt`
attributes.161f062fd2.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+zcf`
attributes.1643841925.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+smnpm`
attributes.16e320f497.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+zicsr`
attributes.17db3edab3.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+zic64b`
attributes.1880fabd67.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv32 -mattr=+c`
attributes.1a63610a7c.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+smrnmi`
attributes.1aa626e3d3.ll (mutant of attributes.ll)	atomic_load_i8_seq_cst	`-mtriple=riscv64 -mattr=+zbs`

Generated 2026-10-15 08:05 UTC.