An example how MSVC can change function argument evaluation order with the same compilation settings. Compile for x86 (32-bit) with MSVC 2015 or 2017 with /O2, with or without REORDER defined.

arg-reorder.cpp

#include <stdio.h>
#include <stdint.h>

__declspec(noinline)
uint32_t giveMeRand()
{
	static uint32_t result = 0xdeadbeef;
	result *= 17;
	return ++result;
}

#ifdef REORDER
__declspec(noinline) // <-- comment/uncomment this line
#endif
static float randUniform(float min, float max)
{
    int granularity = 1000000;
    return min + (max - min) * float(giveMeRand() % granularity) / granularity;
}

struct Vec2
{
	float x, y;

	Vec2(float x, float y): x(x), y(y)
	{
	}
};

int main()
{
	Vec2 v(randUniform(-100.f, 100.f), randUniform(-100.f, 100.f));
	// Output with MSVC 2015/2017 with /O2:
	// No defines: 12.454597, -51.327999
	// /DREORDER: -51.327999, 12.454597
	printf("%f, %f\n", v.x, v.y);
}