fallback: legalize: G_STORE <4 x s1>,p0

Run:	explore-bc8218b282-20261015-075519
Kind:	fallback
Category:	legalize: G_STORE <4 x s1>,p0 NEW
Occurrences:	2009 in 1135 configs, 461 test files
Snippet from:	attributes.002cb79d7d.ll (mutant of attributes.ll) @addi via llvm-extract + llvm-reduce
Config:	`-mtriple=riscv32 -mattr=+zfbfmin`
Local check:	reproduces at bc8218b282
Compiler Explorer:	https://godbolt.org/z/PqMYq5KM9 (llc-assertions-trunk, checked 2026-10-15 08:04 UTC): G reproduces

Snippet:

define i32 @addi() {
  store <4 x i1> zeroinitializer, ptr null, align 1
  ret i32 0
}

Compiler Explorer panes:

Pane	Options	Exit	Insts	stderr
GlobalISel	`-mtriple=riscv32 -mattr=+zfbfmin -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.*`	0	3	remark: <unknown>:0:0: unable to legalize instruction: G_STORE %0:_(<4 x s1>), %2:_(p0) :: (store (<4 x s1>) into `ptr null`) (in function: addi) warning: Instruction selection used fallback path for addi
SelectionDAG (control)	`-mtriple=riscv32 -mattr=+zfbfmin -global-isel=0`	0	3	-

Reproduce:

llc -mtriple=riscv32 -mattr=+zfbfmin -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+zfbfmin -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: G_STORE %0:_(<4 x s1>), %2:_(p0) :: (store (<4 x s1>) into `ptr null`) (in function: addi)
warning: Instruction selection used fallback path for addi

Occurrences (2009) (first 50):

Input	Function	Config
abdu.3707394937.ll (mutant of abdu.ll)	abd_ext_i16_i32	`-mtriple=riscv64 -mattr=+zbb`
abdu.776ed54b48.ll (mutant of abdu.ll)	abd_ext_i16_i32	`-mtriple=riscv32 -mattr=+zbb`
abdu.913ff35ff6.ll (mutant of abdu.ll)	abd_ext_i16_i32	`-mtriple=riscv32`
abdu.cff6033076.ll (mutant of abdu.ll)	abd_ext_i16_i32	`-mtriple=riscv64`
add-before-shl.5e8ed4a5e5.ll (mutant of add-before-shl.ll)	add_huge_const	`-mtriple=riscv64 -mattr=+zca -verify-machineinstrs -M no-aliases`
add-before-shl.6f62a7a8a3.ll (mutant of add-before-shl.ll)	add_huge_const	`-mtriple=riscv32 -verify-machineinstrs -M no-aliases`
add-before-shl.7f1bd0e29f.ll (mutant of add-before-shl.ll)	add_huge_const	`-mtriple=riscv64 -mattr=+c -verify-machineinstrs -M no-aliases`
add-before-shl.810626b7df.ll (mutant of add-before-shl.ll)	add_huge_const	`-mtriple=riscv32 -mattr=+c -verify-machineinstrs -M no-aliases`
add-before-shl.c5b89a6b3a.ll (mutant of add-before-shl.ll)	add_huge_const	`-mtriple=riscv32 -mattr=+zca -verify-machineinstrs -M no-aliases`
add-before-shl.c74cd6546a.ll (mutant of add-before-shl.ll)	add_huge_const	`-mtriple=riscv64 -verify-machineinstrs -M no-aliases`
add-imm64-to-sub.03e7c4d2fa.ll (mutant of add-imm64-to-sub.ll)	add_multiuse_const	`-mtriple=riscv64 -mattr=+m,+zbb,+zbs`
add-imm64-to-sub.65290b594e.ll (mutant of add-imm64-to-sub.ll)	add_multiuse_const	`-mtriple=riscv64 -mattr=+m,+zbb`
add_sext_shl_constant.5932f4a772.ll (mutant of add_sext_shl_constant.ll)	add_sext_shl_moreOneUse_add_inSelect_addexceedsign12	`-mtriple=riscv64 -mattr=+zba`
add_sext_shl_constant.90eb31fa53.ll (mutant of add_sext_shl_constant.ll)	add_sext_shl_moreOneUse_add_inSelect_addexceedsign12	`-mtriple=riscv64`
add_sext_shl_constant.f793e5c32f.ll (mutant of add_sext_shl_constant.ll)	add_sext_shl_moreOneUse_add_inSelect_addexceedsign12	`-mtriple=riscv64 -mattr=+xandesperf`
addc-adde-sube-subc.2d449e607f.ll (mutant of addc-adde-sube-subc.ll)	addc_adde	`-mtriple=riscv32 -verify-machineinstrs`
addcarry.bb719c4a98.ll (mutant of addcarry.ll)	addcarry	`-mtriple=riscv32 -mattr=+m`
aext.306f939db5.ll (mutant of aext.ll)	aext	`-mtriple=riscv32 -verify-machineinstrs`
aext.9bdaa010ce.ll (mutant of aext.ll)	aext	`-mtriple=riscv64 -verify-machineinstrs`
align.39c78b921b.ll (mutant of align.ll)	foo	`-mtriple=riscv32 -mattr=+c -verify-machineinstrs`
align.7a05314b9c.ll (mutant of align.ll)	foo	`-mtriple=riscv32 -verify-machineinstrs`
alloca.663fc72c18.ll (mutant of alloca.ll)	alloca_callframe	`-mtriple=riscv32 -verify-machineinstrs`
allow-check.1451da2266.ll (mutant of allow-check.ll)	test_runtime	`-mtriple=riscv32 -fast-isel=0`
allow-check.fbbe87b397.ll (mutant of allow-check.ll)	test_runtime	`-mtriple=riscv64 -fast-isel=0`
analyze-branch.35f8eb4327.ll (mutant of analyze-branch.ll)	test_bcc_fallthrough_taken	`-mtriple=riscv32 -verify-machineinstrs`
and-negpow2-cmp.84552feaf2.ll (mutant of and-negpow2-cmp.ll)	test5	`-mtriple=riscv32`
and-negpow2-cmp.b4cd8ac1ac.ll (mutant of and-negpow2-cmp.ll)	test5	`-mtriple=riscv64`
and-shl.787190af93.ll (mutant of and-shl.ll)	and_0xffffffff_shl_2	`-mtriple=riscv32 -verify-machineinstrs`
and-shl.a7294ca3f1.ll (mutant of and-shl.ll)	and_0xffffffff_shl_2	`-mtriple=riscv64 -verify-machineinstrs`
and.45572eb70c.ll (mutant of and.ll)	and32_0x7ffff000	`-mtriple=riscv64 -verify-machineinstrs`
and.8859bb5a99.ll (mutant of and.ll)	and32_0x7ffff000	`-mtriple=riscv32 -verify-machineinstrs`
andn-zext-lowmask.0995fbe1f0.ll (mutant of andn-zext-lowmask.ll)	andn_zext_lowmask_i32_i16	`-mtriple=riscv32 -verify-machineinstrs`
andn-zext-lowmask.9479e51e30.ll (mutant of andn-zext-lowmask.ll)	andn_zext_lowmask_i32_i16	`-mtriple=riscv64 -verify-machineinstrs`
andn-zext-lowmask.d536e64bd5.ll (mutant of andn-zext-lowmask.ll)	andn_zext_lowmask_i32_i16	`-mtriple=riscv64 -mattr=+zbb -verify-machineinstrs`
andn-zext-lowmask.e820175051.ll (mutant of andn-zext-lowmask.ll)	andn_zext_lowmask_i32_i16	`-mtriple=riscv32 -mattr=+zbb -verify-machineinstrs`
atomic-cmpxchg-branch-on-result.6638008141.ll (mutant of atomic-cmpxchg-branch-on-result.ll)	cmpxchg_and_irrelevant_branch	`-mtriple=riscv64 -mattr=+a,+zacas -verify-machineinstrs`
atomic-cmpxchg-branch-on-result.9577b6b10f.ll (mutant of atomic-cmpxchg-branch-on-result.ll)	cmpxchg_and_irrelevant_branch	`-mtriple=riscv64 -mattr=+a,+zacas,+zabha -verify-machineinstrs`
atomic-cmpxchg-branch-on-result.ca21acd3bd.ll (mutant of atomic-cmpxchg-branch-on-result.ll)	cmpxchg_and_irrelevant_branch	`-mtriple=riscv32 -mattr=+a -verify-machineinstrs`
atomic-cmpxchg-branch-on-result.d61c5552ac.ll (mutant of atomic-cmpxchg-branch-on-result.ll)	cmpxchg_and_irrelevant_branch	`-mtriple=riscv64 -mattr=+a -verify-machineinstrs`
atomic-cmpxchg-branch-on-result.dfa9817e01.ll (mutant of atomic-cmpxchg-branch-on-result.ll)	cmpxchg_and_irrelevant_branch	`-mtriple=riscv32 -mattr=+a,+zacas -verify-machineinstrs`
atomic-cmpxchg-flag.c991e5ab28.ll (mutant of atomic-cmpxchg-flag.ll)	cmpxchg_i32_seq_cst_seq_cst	`-mtriple=riscv64 -mattr=+a -verify-machineinstrs`
atomic-fence.0b7868540b.ll (mutant of atomic-fence.ll)	fence_acq_rel	`-mtriple=riscv32 -mattr=+a -verify-machineinstrs`
atomic-fence.104961667e.ll (mutant of atomic-fence.ll)	fence_singlethread_acquire	`-mtriple=riscv64 -mattr=+a,+ztso -verify-machineinstrs`
atomic-fence.15f2aa5a41.ll (mutant of atomic-fence.ll)	fence_singlethread_acquire	`-mtriple=riscv32 -verify-machineinstrs`
atomic-fence.18c4dc4b45.ll (mutant of atomic-fence.ll)	fence_acq_rel	`-mtriple=riscv64 -mattr=+a -verify-machineinstrs`
atomic-fence.348e746f7f.ll (mutant of atomic-fence.ll)	fence_acq_rel	`-mtriple=riscv32 -mattr=+a,+ztso -verify-machineinstrs`
atomic-fence.3b942ba8a3.ll (mutant of atomic-fence.ll)	fence_singlethread_acquire	`-mtriple=riscv64 -mattr=+zalrsc -verify-machineinstrs`
atomic-fence.4d5320048d.ll (mutant of atomic-fence.ll)	fence_singlethread_acquire	`-mtriple=riscv64 -mattr=+a -verify-machineinstrs`
atomic-fence.5cd0a7eb02.ll (mutant of atomic-fence.ll)	fence_singlethread_acquire	`-mtriple=riscv64 -verify-machineinstrs`
atomic-fence.7e9c719ebf.ll (mutant of atomic-fence.ll)	fence_acq_rel	`-mtriple=riscv32 -mattr=+zalrsc -verify-machineinstrs`

Generated 2026-10-15 08:05 UTC.