From 46fc55e27390ea85eb34ec0367f40426197c9b9f Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Thu, 19 Mar 2026 11:51:13 +0100
Subject: regalloc & emit: explicit comparisons over memcmp of small structures

The one in x86-64_emit was not portable due to relying on zero
initialization of inactive union fields/padding.
---
 src/ir_regalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/ir_regalloc.c')

diff --git a/src/ir_regalloc.c b/src/ir_regalloc.c
index ddb05e2..54f5d59 100644
--- a/src/ir_regalloc.c
+++ b/src/ir_regalloc.c
@@ -210,7 +210,7 @@ typedef struct {
 static void
 pmadd(PMState *pms, enum irclass k, Alloc dst, Alloc src)
 {
-   if (!memcmp(&dst, &src, sizeof dst)) return;
+   if (dst.bits == src.bits) return;
    assert(pms->npmove < MAXREGS);
    pms->pmove[pms->npmove++] = (struct PMove) { k, PMTOMOVE, dst, src };
 }
-- 
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