scc

commit 07f70acdb3d9ceacf52f66dcfe6c4d2c0b6059eb
parent 04bf83528662711fca73d47d49ef64fd39cf431c
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu, 26 Dec 2024 10:04:27 +0100

cc1: Include OBLOOP and OELOOP in the loop body

These two ops can help to identify variables that can be
pushed/poped or directly using register banking.

Diffstat:
M
src/cmd/scc-cc/cc1/stmt.c
 | 
12
++++++------

1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/src/cmd/scc-cc/cc1/stmt.c b/src/cmd/scc-cc/cc1/stmt.c
@@ -96,12 +96,12 @@ While(Symbol *lbreak, Symbol *lcont, Switch *lswitch)
 
 	emit(OJUMP, lcont);
 
-	emit(OBLOOP, NULL);
 	emit(OLABEL, begin);
+	emit(OBLOOP, NULL);
 	stmt(lbreak, lcont, lswitch);
 	emit(OLABEL, lcont);
-	branch(begin, np);
 	emit(OELOOP, NULL);
+	branch(begin, np);
 
 	emit(OLABEL, lbreak);
 }
@@ -142,14 +142,14 @@ For(Symbol *lbreak, Symbol *lcont, Switch *lswitch)
 	if (econd)
 		emit(OJUMP, cond);
 
-	emit(OBLOOP, NULL);
 	emit(OLABEL, begin);
+	emit(OBLOOP, NULL);
 	stmt(lbreak, lcont, lswitch);
 	emit(OLABEL, lcont);
 	emit(OEXPR, einc);
 	emit(OLABEL, cond);
-	branch(begin, econd);
 	emit(OELOOP, NULL);
+	branch(begin, econd);
 
 	emit(OLABEL, lbreak);
 
@@ -168,8 +168,8 @@ Dowhile(Symbol *lbreak, Symbol *lcont, Switch *lswitch)
 
 	expect(DO);
 
-	emit(OBLOOP, NULL);
 	emit(OLABEL, begin);
+	emit(OBLOOP, NULL);
 
 	stmt(lbreak, lcont, lswitch);
 	expect(WHILE);
@@ -177,8 +177,8 @@ Dowhile(Symbol *lbreak, Symbol *lcont, Switch *lswitch)
 	expect(';');
 
 	emit(OLABEL, lcont);
-	branch(begin, np);
 	emit(OELOOP, NULL);
+	branch(begin, np);
 
 	emit(OLABEL, lbreak);
 }