fallback: legalize: G_STORE <3 x s1>,p0

Run:main-04ca53e65f-20261014-113325
Kind:fallback
Category:legalize: G_STORE <3 x s1>,p0 NEW
Occurrences:8 in 2 configs, 1 test files
Snippet from:llvm.exp10.13bbbca8af.ll (mutant of llvm.exp10.ll) @exp10_v3f16 via llvm-extract + llvm-reduce
Config:-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d
Local check:reproduces at 04ca53e65f
Compiler Explorer:https://godbolt.org/z/EndzhEj99 (llc-assertions-trunk, checked 2026-10-14 11:04 UTC): G reproduces

Snippet:

define <3 x half> @exp10_v3f16() {
  store <3 x i1> zeroinitializer, ptr null, align 1
  ret <3 x half> zeroinitializer
}

Compiler Explorer panes:

PaneOptionsExitInstsstderr
GlobalISel-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.*04remark: <unknown>:0:0: unable to legalize instruction: G_STORE %1:_(<3 x s1>), %3:_(p0) :: (store (<3 x s1>) into `ptr null`) (in function: exp10_v3f16)
warning: Instruction selection used fallback path for exp10_v3f16
SelectionDAG (control)-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d -global-isel=004-

Reproduce:

llc -mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to legalize instruction: G_STORE %1:_(<3 x s1>), %3:_(p0) :: (store (<3 x s1>) into `ptr null`) (in function: exp10_v3f16)
warning: Instruction selection used fallback path for exp10_v3f16

Occurrences (8):

InputFunctionConfig
llvm.exp10.13bbbca8af.ll (mutant of llvm.exp10.ll)exp10_v3f16-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d
llvm.exp10.13bbbca8af.ll (mutant of llvm.exp10.ll)exp10_v3f64-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d
llvm.exp10.77d3e8c1f7.ll (mutant of llvm.exp10.ll)exp10_v3f16-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d
llvm.exp10.79a75f5dfc.ll (mutant of llvm.exp10.ll)exp10_v3f16-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d
llvm.exp10.827f27bf2c.ll (mutant of llvm.exp10.ll)exp10_v3f16-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d
llvm.exp10.de3b9bed6d.ll (mutant of llvm.exp10.ll)exp10_v3f16-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d
llvm.exp10.de3b9bed6d.ll (mutant of llvm.exp10.ll)exp10_v3f64-mtriple=riscv64 -mattr=+d -verify-machineinstrs -target-abi=lp64d
llvm.exp10.fc057fd888.ll (mutant of llvm.exp10.ll)exp10_v3f16-mtriple=riscv32 -mattr=+d -verify-machineinstrs -target-abi=ilp32d

Generated 2026-10-15 08:05 UTC.