fallback: legalize: G_STORE <16 x s1>,p0
| Run: | main-bc8218b282-20261015-074651 |
| Kind: | fallback |
| Category: | legalize: G_STORE <16 x s1>,p0 NEW |
| Occurrences: | 5 in 3 configs, 2 test files |
| Snippet from: | fastcc-int.559d2751d0.ll (mutant of fastcc-int.ll) @callee via llvm-extract + llvm-reduce |
| Config: | -mtriple=riscv64 -verify-machineinstrs |
| Local check: | reproduces at bc8218b282 |
| Compiler Explorer: | https://godbolt.org/z/dKPMbcfc7 (llc-assertions-trunk, checked 2026-10-14 11:04 UTC): G reproduces |
Snippet:
define fastcc i32 @callee() {
store <16 x i1> zeroinitializer, ptr null, align 2
ret i32 0
}
Compiler Explorer panes:
| Pane | Options | Exit | Insts | stderr |
|---|
| GlobalISel | -mtriple=riscv64 -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* | 0 | 4 | remark: <unknown>:0:0: unable to legalize instruction: G_STORE %0:_(<16 x s1>), %2:_(p0) :: (store (<16 x s1>) into `ptr null`) (in function: callee)
warning: Instruction selection used fallback path for callee |
| SelectionDAG (control) | -mtriple=riscv64 -verify-machineinstrs -global-isel=0 | 0 | 4 | - |
Reproduce:
llc -mtriple=riscv64 -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv64 -verify-machineinstrs -global-isel=0 snippet.ll -o -
Local llc output:
remark: <unknown>:0:0: unable to legalize instruction: G_STORE %0:_(<16 x s1>), %2:_(p0) :: (store (<16 x s1>) into `ptr null`) (in function: callee)
warning: Instruction selection used fallback path for callee
Occurrences (5):
| Input | Function | Config |
|---|
| calling-conv-p-ext-vector.883bef211a.ll (mutant of calling-conv-p-ext-vector.ll) | test_cc_v16i8 | -mtriple=riscv64 -mattr=+experimental-p,+m,+zbb -verify-machineinstrs |
| fastcc-int.559d2751d0.ll (mutant of fastcc-int.ll) | callee | -mtriple=riscv64 -verify-machineinstrs |
| fastcc-int.559d2751d0.ll (mutant of fastcc-int.ll) | caller | -mtriple=riscv64 -verify-machineinstrs |
| fastcc-int.eaf99120cb.ll (mutant of fastcc-int.ll) | callee | -mtriple=riscv32 -verify-machineinstrs |
| fastcc-int.eaf99120cb.ll (mutant of fastcc-int.ll) | caller | -mtriple=riscv32 -verify-machineinstrs |
Generated 2026-10-15 08:05 UTC.