Simplify argument iteration.

Author: maleadt

src/core/instructions.jl

@@ -135,7 +135,7 @@ end
 
 export callconv, callconv!,
        istailcall, tailcall!,
-       called_value, num_arg_operands,
+       called_value, arguments,
        OperandBundleUse, OperandBundleDef, operand_bundles
 
 callconv(inst::Instruction) = API.LLVMGetInstructionCallConv(inst)
@@ -147,7 +147,10 @@ tailcall!(inst::Instruction, bool) = API.LLVMSetTailCall(inst, convert(Bool, boo
 
 called_value(inst::Instruction) = Value(API.LLVMGetCalledValue(inst))
 
-num_arg_operands(inst::Instruction) = Int(API.LLVMGetNumArgOperands(inst))
+function arguments(inst::Instruction)
+    nargs = API.LLVMGetNumArgOperands(inst)
+    operands(inst)[1:nargs]
+end
 
 # operand bundles
 

test/instructions.jl

@@ -313,10 +313,10 @@ end
             @test length(operands(cy)) == 3
             @test length(operands(cz)) == 2
 
-            ## num_arg_operands excludes all those
-            @test num_arg_operands(cx) == 0
-            @test num_arg_operands(cy) == 0
-            @test num_arg_operands(cz) == 0
+            ## arguments excludes all those
+            @test length(arguments(cx)) == 0
+            @test length(arguments(cy)) == 0
+            @test length(arguments(cz)) == 0
 
             let bundles = operand_bundles(cx)
                 @test isempty(bundles)