harec

commit 98bca555e925528996607579e5d1e6c6ca806f1e
parent 3f5277da3d8e02829ef6f5f00003a8e8781ad9cc
Author: Drew DeVault <sir@cmpwn.com>
Date:   Mon,  2 Aug 2021 15:57:16 +0200

gen: skip final adds on gen_copy_struct

Signed-off-by: Drew DeVault <sir@cmpwn.com>

Diffstat:
M
src/gen.c
 | 
12
+++++++-----

1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/src/gen.c b/src/gen.c
@@ -60,17 +60,19 @@ gen_copy_struct(struct gen_context *ctx,
 	struct qbe_value temp = {
 		.kind = QV_TEMPORARY,
 		.type = ctx->arch.ptr,
-		.name = gen_name(ctx, "item.%d"),
+		.name = gen_name(ctx, ".%d"),
 	};
-	struct qbe_value destp = mkcopy(ctx, &dest, "dest.%d");
-	struct qbe_value srcp = mkcopy(ctx, &src, "src.%d");
+	struct qbe_value destp = mkcopy(ctx, &dest, ".%d");
+	struct qbe_value srcp = mkcopy(ctx, &src, ".%d");
 	struct qbe_value align = constl(dest.type->align);
 	for (size_t offset = 0; offset < dest.type->size;
 			offset += dest.type->align) {
 		pushi(ctx->current, &temp, load, &srcp, NULL);
 		pushi(ctx->current, NULL, store, &temp, &destp, NULL);
-		pushi(ctx->current, &srcp, Q_ADD, &srcp, &align, NULL);
-		pushi(ctx->current, &destp, Q_ADD, &destp, &align, NULL);
+		if (offset + dest.type->align < dest.type->size) {
+			pushi(ctx->current, &srcp, Q_ADD, &srcp, &align, NULL);
+			pushi(ctx->current, &destp, Q_ADD, &destp, &align, NULL);
+		}
 	}
 }