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transforms.llvm_ir_generator: use sret attribute on FFI calls too.

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This commit is contained in:
whitequark 2016-01-10 17:42:40 +00:00
parent 7f914a057c
commit d436093317
1 changed files with 21 additions and 16 deletions
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37
artiq/compiler/transforms/llvm_ir_generator.py
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@ -940,10 +940,17 @@ class LLVMIRGenerator:
llfunname = insn.target_function().type.name
llfun = self.llmodule.get_global(llfunname)
if llfun is None:
llfunty = ll.FunctionType(self.llty_of_type(insn.type, for_return=True),
[llarg.type for llarg in llargs])
llfun = ll.Function(self.llmodule, llfunty,
insn.target_function().type.name)
llretty = self.llty_of_type(insn.type, for_return=True)
if self.needs_sret(llretty):
llfunty = ll.FunctionType(llvoid, [llretty.as_pointer()] +
[llarg.type for llarg in llargs])
else:
llfunty = ll.FunctionType(llretty, [llarg.type for llarg in llargs])
llfun = ll.Function(self.llmodule, llfunty,
insn.target_function().type.name)
if self.needs_sret(llretty):
llfun.args[0].add_attribute('sret')
return llfun, list(llargs)
# See session.c:{send,receive}_rpc_value and comm_generic.py:_{send,receive}_rpc_value.
@ -1087,24 +1094,22 @@ class LLVMIRGenerator:
llnormalblock=None, llunwindblock=None)
elif types.is_c_function(insn.target_function().type):
llfun, llargs = self._prepare_ffi_call(insn)
return self.llbuilder.call(llfun, llargs,
name=insn.name)
else:
llfun, llargs = self._prepare_closure_call(insn)
if self.has_sret(insn.target_function().type):
llstackptr = self.llbuilder.call(self.llbuiltin("llvm.stacksave"), [])
if self.has_sret(insn.target_function().type):
llstackptr = self.llbuilder.call(self.llbuiltin("llvm.stacksave"), [])
llresultslot = self.llbuilder.alloca(llfun.type.pointee.args[0].pointee)
self.llbuilder.call(llfun, [llresultslot] + llargs)
llresult = self.llbuilder.load(llresultslot)
llresultslot = self.llbuilder.alloca(llfun.type.pointee.args[0].pointee)
self.llbuilder.call(llfun, [llresultslot] + llargs)
llresult = self.llbuilder.load(llresultslot)
self.llbuilder.call(self.llbuiltin("llvm.stackrestore"), [llstackptr])
self.llbuilder.call(self.llbuiltin("llvm.stackrestore"), [llstackptr])
return llresult
else:
return self.llbuilder.call(llfun, llargs,
name=insn.name)
return llresult
else:
return self.llbuilder.call(llfun, llargs,
name=insn.name)
def process_Invoke(self, insn):
llnormalblock = self.map(insn.normal_target())