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make pointer allocation feasible but subverting LLC

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varun-r-mallya
2025-11-21 20:21:24 +05:30
parent 25394059a6
commit 9ee821c7f6
2 changed files with 17 additions and 13 deletions
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4
pythonbpf/allocation_pass.py
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@ -121,10 +121,10 @@ def _allocate_for_call(
elif VmlinuxHandlerRegistry.is_vmlinux_struct(call_type):
# When calling struct_name(pointer), we're doing a cast, not construction
# So we allocate as a pointer (i64) not as the actual struct
var = builder.alloca(ir.PointerType(), name=var_name)
var = builder.alloca(ir.IntType(64), name=var_name)
var.align = 8
local_sym_tab[var_name] = LocalSymbol(
var, ir.PointerType(), VmlinuxHandlerRegistry.get_struct_type(call_type)
var, ir.IntType(64), VmlinuxHandlerRegistry.get_struct_type(call_type)
)
logger.info(
f"Pre-allocated {var_name} for vmlinux struct pointer cast to {call_type}"