scc

commit 24bd7b7da52f8606e5c5a8086c6b731d95154412
parent 787ffacf2b35fb9a3a77c6c6053d5d96d6a3766f
Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date:   Fri, 27 Mar 2026 09:47:27 +0100

cc1: Promote constants from llong to ullong

When a constant does not fit in a long long value then it must be
promoted to unsigned long long.

Diffstat:
M
src/cmd/scc-cc/cc1/lex.c
 | 
2
++
A
tests/cc/execute/0253-maxconst.c
 | 
7
+++++++
M
tests/cc/execute/scc-tests.lst
 | 
1
+

3 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/src/cmd/scc-cc/cc1/lex.c b/src/cmd/scc-cc/cc1/lex.c
@@ -374,6 +374,8 @@ readint(int base, int sign, Symbol *sym)
 				tp = (base==10) ? longtype : uinttype;
 			else if (tp == longtype)
 				tp = (base==10) ? llongtype : ulongtype;
+			else if (tp == llongtype)
+				tp = ullongtype;
 			else
 				goto overflow;
 		} else {
diff --git a/tests/cc/execute/0253-maxconst.c b/tests/cc/execute/0253-maxconst.c
@@ -0,0 +1,7 @@
+int
+main(void)
+{
+	unsigned long long u = 18446744073709551615ull;
+
+	return !(u == 18446744073709551615);
+}
diff --git a/tests/cc/execute/scc-tests.lst b/tests/cc/execute/scc-tests.lst
@@ -243,3 +243,4 @@
 0250-div.c
 0251-mul.c
 0252-literal.c
+0253-maxconst.c