From a67259ca69abdd61b5b7e7f85cb08beaec126ddd Mon Sep 17 00:00:00 2001
From: Hojun-Cho <ghwns6743@gmail.com>
Date: Wed, 3 Jun 2026 04:19:38 +0900
Subject: [PATCH] wcc/cgen: localfind inline name-loop -> strings.compare
 (Wave-2 hand-rolled->lib)

The open-coded len-guard + byte-by-byte equality loop in localfind is
exactly strings.compare(ln, name) == 0 (==0 demands equal length AND
equal bytes; no prefix false-match). Matches cstage cgen.c:1669
strcmp(l->name, name) == 0. The @-fallback streq + localfindnode streq
calls are shared-helper calls, left for the wholesale swap (#17).

Regenerated w6c + wwdump combined.ww (the only amalgamations embedding
cgen.ww's localfind).
---
 selfhost/cmd/w6c/main.combined.ww    | 11 ++---------
 selfhost/cmd/wcc/cgen.ww             | 11 ++---------
 selfhost/cmd/wwdump/main.combined.ww | 11 ++---------
 3 files changed, 6 insertions(+), 27 deletions(-)

diff --git a/selfhost/cmd/w6c/main.combined.ww b/selfhost/cmd/w6c/main.combined.ww
index aa037f42..e7d492a2 100644
--- a/selfhost/cmd/w6c/main.combined.ww
+++ b/selfhost/cmd/w6c/main.combined.ww
@@ -31695,6 +31695,7 @@ import tok;
 import typ;
 import sym;
 import strconv;
+import strings;
 import io;
 import memio;
 // Split files. Bundler pulls these in transitively so consumers only
@@ -32337,15 +32338,7 @@ fn localfind(c: *cgen, name: str) i32 = {
 	let l: *local = c.locals;
 	for (l != nil) {
 		let ln: str = l.name;
-		if (ln.len == name.len) {
-			let i: i32 = 0;
-			let eq: bool = true;
-			for (i < name.len) {
-				if (ln[i] != name[i]) { eq = false; i = name.len; }
-				else { i += 1; };
-			};
-			if (eq) { return l.off; };
-		};
+		if (strings.compare(ln, name) == 0) { return l.off; };
 		l = l.lnext;
 	};
 	if (name.len > 0) {
diff --git a/selfhost/cmd/wcc/cgen.ww b/selfhost/cmd/wcc/cgen.ww
index d9614d9b..0e0725c2 100644
--- a/selfhost/cmd/wcc/cgen.ww
+++ b/selfhost/cmd/wcc/cgen.ww
@@ -30,6 +30,7 @@ import tok;
 import typ;
 import sym;
 import strconv;
+import strings;
 import io;
 import memio;
 // Split files. Bundler pulls these in transitively so consumers only
@@ -672,15 +673,7 @@ fn localfind(c: *cgen, name: str) i32 = {
 	let l: *local = c.locals;
 	for (l != nil) {
 		let ln: str = l.name;
-		if (ln.len == name.len) {
-			let i: i32 = 0;
-			let eq: bool = true;
-			for (i < name.len) {
-				if (ln[i] != name[i]) { eq = false; i = name.len; }
-				else { i += 1; };
-			};
-			if (eq) { return l.off; };
-		};
+		if (strings.compare(ln, name) == 0) { return l.off; };
 		l = l.lnext;
 	};
 	if (name.len > 0) {
diff --git a/selfhost/cmd/wwdump/main.combined.ww b/selfhost/cmd/wwdump/main.combined.ww
index d681b893..27c88ada 100644
--- a/selfhost/cmd/wwdump/main.combined.ww
+++ b/selfhost/cmd/wwdump/main.combined.ww
@@ -31695,6 +31695,7 @@ import tok;
 import typ;
 import sym;
 import strconv;
+import strings;
 import io;
 import memio;
 // Split files. Bundler pulls these in transitively so consumers only
@@ -32337,15 +32338,7 @@ fn localfind(c: *cgen, name: str) i32 = {
 	let l: *local = c.locals;
 	for (l != nil) {
 		let ln: str = l.name;
-		if (ln.len == name.len) {
-			let i: i32 = 0;
-			let eq: bool = true;
-			for (i < name.len) {
-				if (ln[i] != name[i]) { eq = false; i = name.len; }
-				else { i += 1; };
-			};
-			if (eq) { return l.off; };
-		};
+		if (strings.compare(ln, name) == 0) { return l.off; };
 		l = l.lnext;
 	};
 	if (name.len > 0) {