https://github.com/anematode updated
https://github.com/llvm/llvm-project/pull/149688
>From 5def3c282d446e6ac687cdef37710e9545814cbf Mon Sep 17 00:00:00 2001
From: Timothy Herchen <timothy.herc...@gmail.com>
Date: Sat, 19 Jul 2025 18:55:17 -0700
Subject: [PATCH 1/2] [clang] Don't warn on zero literals with -std=c2y
Fixes #149669
---
clang/lib/Lex/LiteralSupport.cpp | 2 +-
clang/test/C/C2y/n3353.c | 8 +++-----
2 files changed, 4 insertions(+), 6 deletions(-)
diff --git a/clang/lib/Lex/LiteralSupport.cpp b/clang/lib/Lex/LiteralSupport.cpp
index a62508e3e27bf..5b08d7f0efe5a 100644
--- a/clang/lib/Lex/LiteralSupport.cpp
+++ b/clang/lib/Lex/LiteralSupport.cpp
@@ -1467,7 +1467,7 @@ void
NumericLiteralParser::ParseNumberStartingWithZero(SourceLocation TokLoc) {
if (s != PossibleNewDigitStart)
DigitsBegin = PossibleNewDigitStart;
else
- IsSingleZero = (s == ThisTokEnd); // Is the only thing we've seen a 0?
+ IsSingleZero = (s == ThisTokBegin + 1);
if (s == ThisTokEnd)
return; // Done, simple octal number like 01234
diff --git a/clang/test/C/C2y/n3353.c b/clang/test/C/C2y/n3353.c
index cd61cbf039067..44dc1cabae2a1 100644
--- a/clang/test/C/C2y/n3353.c
+++ b/clang/test/C/C2y/n3353.c
@@ -44,7 +44,9 @@ static const void *ptr = 0o0; /* ext-warning {{octal integer
literals are a C2y
#endif
// 0 by itself is not deprecated, of course.
-int k = 0;
+int k1 = 0;
+long k2 = 0l;
+unsigned long long k3 = 0ull;
// Test a preprocessor use of 0 by itself, which is also not deprecated.
#if 0
@@ -65,7 +67,6 @@ static_assert(__extension__ _Generic(typeof(l), const int :
1, default : 0)); //
// Note that 0o by itself is an invalid literal.
int m = 0o; /* expected-error {{invalid suffix 'o' on integer constant}}
- c2y-warning {{octal literals without a '0o' prefix are
deprecated}}
*/
// Ensure negation works as expected.
@@ -83,13 +84,11 @@ int n = 0o18; /* expected-error {{invalid digit '8' in
octal constant}}
cpp-warning {{octal integer literals are a Clang extension}}
*/
int o1 = 0o8; /* expected-error {{invalid suffix 'o8' on integer constant}}
- c2y-warning {{octal literals without a '0o' prefix are
deprecated}}
*/
// FIXME: however, it matches the behavior for hex literals in terms of the
// error reported. Unfortunately, we then go on to think 0 is an octal literal
// without a prefix, which is again a bit confusing.
int o2 = 0xG; /* expected-error {{invalid suffix 'xG' on integer constant}}
- c2y-warning {{octal literals without a '0o' prefix are
deprecated}}
*/
// Show that floating-point suffixes on octal literals are rejected.
@@ -130,7 +129,6 @@ constexpr int p = 0o0'1'2'3'4'5'6'7; /* compat-warning
{{octal integer literals
*/
static_assert(p == 01234567); // c2y-warning {{octal literals without a '0o'
prefix are deprecated}}
int q = 0o'0'1; /* expected-error {{invalid suffix 'o'0'1' on integer
constant}}
- c2y-warning {{octal literals without a '0o' prefix are
deprecated}}
*/
#define M 0o123
>From 8fe76c6a91f7b3df7b560d6fdaaafe6e5a07e5b9 Mon Sep 17 00:00:00 2001
From: Timothy Herchen <timothy.herc...@gmail.com>
Date: Sun, 20 Jul 2025 08:16:44 -0700
Subject: [PATCH 2/2] Update clang/test/C/C2y/n3353.c
Co-authored-by: A. Jiang <d...@live.cn>
---
clang/test/C/C2y/n3353.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/clang/test/C/C2y/n3353.c b/clang/test/C/C2y/n3353.c
index 44dc1cabae2a1..a2e08cf6344db 100644
--- a/clang/test/C/C2y/n3353.c
+++ b/clang/test/C/C2y/n3353.c
@@ -44,9 +44,12 @@ static const void *ptr = 0o0; /* ext-warning {{octal
integer literals are a C2y
#endif
// 0 by itself is not deprecated, of course.
-int k1 = 0;
-long k2 = 0l;
-unsigned long long k3 = 0ull;
+int k1 = 0;
+unsigned int k2 = 0u;
+long k3 = 0l;
+unsigned long k4 = 0ul;
+long long k5 = 0ll;
+unsigned long long k6 = 0ull;
// Test a preprocessor use of 0 by itself, which is also not deprecated.
#if 0
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
