8e9d163e2b
git-svn-id: http://llvm-py.googlecode.com/svn/trunk@34 8d1e9007-1d4e-0410-b67e-1979fd6579aa
38 lines
1.2 KiB
Python
38 lines
1.2 KiB
Python
#!/usr/bin/env python
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# Import the llvm-py modules.
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from llvm import *
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from llvm.core import *
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from llvm.ee import * # new import: ee = Execution Engine
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# Create a module, as in the previous example.
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my_module = Module.new('my_module')
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ty_int = Type.int() # by default 32 bits
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ty_func = Type.function(ty_int, [ty_int, ty_int])
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f_sum = my_module.add_function(ty_func, "sum")
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f_sum.args[0].name = "a"
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f_sum.args[1].name = "b"
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bb = f_sum.append_basic_block("entry")
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builder = Builder.new(bb)
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tmp = builder.add(f_sum.args[0], f_sum.args[1], "tmp")
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builder.ret(tmp)
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# Create a module provider object first. Modules can come from
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# in-memory IRs like what we created now, or from bitcode (.bc)
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# files. The module provider abstracts this detail.
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mp = ModuleProvider.new(my_module)
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# Create an execution engine object. This will create a JIT compiler
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# on platforms that support it, or an interpreter otherwise.
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ee = ExecutionEngine.new(mp)
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# The arguments needs to be passed as "GenericValue" objects.
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arg1 = GenericValue.int(ty_int, 100)
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arg2 = GenericValue.int(ty_int, 42)
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# Now let's compile and run!
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retval = ee.run_function(f_sum, [arg1, arg2])
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# The return value is also GenericValue. Let's print it.
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print "returned", retval.as_int()
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