From 74abc5ad2f4bf4f737b6c910b3048f7937345aad Mon Sep 17 00:00:00 2001
From: Joachim Henke <37883863+jo-he@users.noreply.github.com>
Date: Fri, 26 Jul 2019 09:59:18 +0200
Subject: [PATCH] avoid a register copy when fetching the stack pointer in
 _start

---
 std/special/start.zig | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/std/special/start.zig b/std/special/start.zig
index f8a018e0a..3427ff422 100644
--- a/std/special/start.zig
+++ b/std/special/start.zig
@@ -35,13 +35,13 @@ nakedcc fn _start() noreturn {
 
     switch (builtin.arch) {
         .x86_64 => {
-            argc_ptr = asm ("lea (%%rsp), %[argc]"
-                : [argc] "=r" (-> [*]usize)
+            argc_ptr = asm (""
+                : [argc] "={rsp}" (-> [*]usize)
             );
         },
         .i386 => {
-            argc_ptr = asm ("lea (%%esp), %[argc]"
-                : [argc] "=r" (-> [*]usize)
+            argc_ptr = asm (""
+                : [argc] "={esp}" (-> [*]usize)
             );
         },
         .aarch64, .aarch64_be => {