Julia Codegen analysis!

gistfile1.txt

julia> function f(x)                                           
         for i=1:length(x)                        
           @inbounds x[i] *= 2   
         end
       end
f (generic function with 1 method)

julia> code_llvm(f, (Matrix{Float64},))

define internal void @julia_f(%jl_value_t*) {
top:
  %1 = getelementptr inbounds %jl_value_t* %0, i64 2, i32 0, !dbg !578
  %2 = load %jl_value_t** %1, align 8, !dbg !578
  %3 = icmp slt %jl_value_t* %2, inttoptr (i64 1 to %jl_value_t*), !dbg !583
  br i1 %3, label %L2, label %if.lr.ph, !dbg !583

if.lr.ph:                                         ; preds = %top
  %4 = getelementptr inbounds %jl_value_t* %0, i64 1, i32 0, !dbg !578
  %5 = load %jl_value_t** %4, align 8, !dbg !578
  %6 = ptrtoint %jl_value_t* %2 to i64, !dbg !578
  br label %if, !dbg !583

if:                                               ; preds = %if.lr.ph, %if
  %"#s1.03" = phi i64 [ 1, %if.lr.ph ], [ %12, %if ]
  %7 = add i64 %"#s1.03", -1, !dbg !584
  %8 = getelementptr %jl_value_t* %5, i64 %7, !dbg !584
  %9 = bitcast %jl_value_t* %8 to double*, !dbg !584
  %10 = load double* %9, align 8, !dbg !584
  %11 = fmul double %10, 2.000000e+00, !dbg !584
  store double %11, double* %9, align 8, !dbg !584
  %12 = add i64 %"#s1.03", 1, !dbg !585
  %13 = icmp sgt i64 %12, %6, !dbg !583
  br i1 %13, label %L2, label %if, !dbg !583

L2:                                               ; preds = %if, %top
  ret void, !dbg !585
}

julia> code_native(f, (Matrix{Float64},))
	.text
Filename: none
Source line: 2
	push	RBP
	mov	RBP, RSP
Source line: 2
	mov	RAX, QWORD PTR [RDI + 16]
	test	RAX, RAX
	jle	37
	mov	RCX, QWORD PTR [RDI + 8]
	mov	EDX, 1
Source line: 151
	vmovsd	XMM0, QWORD PTR [RCX]
	vaddsd	XMM0, XMM0, XMM0
	vmovsd	QWORD PTR [RCX], XMM0
Source line: 2
	add	RCX, 8
Source line: 152
	inc	RDX
	cmp	RDX, RAX
Source line: 2
	jle	-28
Source line: 152
	pop	RBP
	ret

julia>