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.

1 files changed, 1 insertions, 1 deletions

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 };
 }