fallback: legalize: G_SEXTLOAD s32,p10,s16
| Run: | explore-04ca53e65f-20261014-114124 |
| Kind: | fallback |
| Category: | legalize: G_SEXTLOAD s32,p10,s16 NEW |
| Occurrences: | 1 in 1 configs, 1 test files |
| Snippet from: | addrspacecast.0f51e39d62.ll (mutant of addrspacecast.ll) @cast1 via llvm-extract |
| Config: | -mtriple=riscv32 -verify-machineinstrs |
| Local check: | reproduces at 04ca53e65f |
| Compiler Explorer: | not uploaded (over --godbolt-limit or disabled) |
Snippet:
@G = external global i8
define void @cast1(ptr %ptr) {
%LGV = load i8, ptr @G, align 1
%castptr = addrspacecast ptr %ptr to ptr addrspace(10)
%L = load i16, ptr addrspace(10) %castptr, align 2
%B = ashr i8 0, %LGV
%G = getelementptr ptr addrspace(10), ptr %ptr, i16 %L
call void @foo(ptr addrspace(10) %castptr)
store ptr %G, ptr poison, align 8
store i8 %B, ptr @G, align 1
ret void
}
declare void @foo(ptr addrspace(10))
Reproduce:
llc -mtriple=riscv32 -verify-machineinstrs -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -verify-machineinstrs -global-isel=0 snippet.ll -o -
Local llc output:
remark: <unknown>:0:0: unable to legalize instruction: %7:_(s32) = G_SEXTLOAD %3:_(p10) :: (load (s16) from %ir.castptr, addrspace 10) (in function: cast1)
warning: Instruction selection used fallback path for cast1
Occurrences (1):
| Input | Function | Config |
|---|
| addrspacecast.0f51e39d62.ll (mutant of addrspacecast.ll) | cast1 | -mtriple=riscv32 -verify-machineinstrs |
Generated 2026-10-15 08:05 UTC.