[assembly][cppcon 2017] What Has My Compiler Done for Me Lately? -- Matt Godbolt

Slides:
https://goo.gl/Ljrg9m

Nice talk! Matt himself is really knowledgeable and easy going person, one of the best talk for 2017 CppCon.


Instruction:
lea  (load effective address)

struct Point
{
     int xcoord;
     int ycoord;
};

int y = points[i].ycoord;   // MOV EDX, [EBX + 8*EAX + 4]    ; right side is "effective address"
int *p = &points[i].ycoord; // LEA ESI, [EBX + 8*EAX + 4]  ; load the address in ESI

Reference:
http://vsdmars.blogspot.com/2017/11/assembly-note.html
http://www.jagregory.com/abrash-zen-of-asm/
https://www.amazon.com/Programming-Ground-Up-Jonathan-Bartlett/dp/1616100648

Tools:
http://quick-bench.com