From 32f66f7008ce8fff1a8cdc5219978d1a61d4684c Mon Sep 17 00:00:00 2001
From: Marc Mutz <marc.mutz@qt.io>
Date: Tue, 12 Sep 2023 23:38:34 +0200
Subject: [PATCH] Add some tests for q(u)int128

Check that QIntegerForSize<16> and std::numeric_limits<quint128> work
and that q(u)int128 are available in C mode, too.

Pick-to: 6.6
Change-Id: I44af8282399c78f6e74a8268af53bad64407ca34
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
---
 src/corelib/global/qtypes.cpp                     | 12 ++++++++++++
 tests/auto/corelib/global/qglobal/qglobal.c       |  7 +++++++
 tests/auto/corelib/global/qglobal/tst_qglobal.cpp |  6 ++++++
 3 files changed, 25 insertions(+)

diff --git a/src/corelib/global/qtypes.cpp b/src/corelib/global/qtypes.cpp
index 5c3b963a92..136766eba6 100644
--- a/src/corelib/global/qtypes.cpp
+++ b/src/corelib/global/qtypes.cpp
@@ -399,5 +399,17 @@ static_assert(sizeof(qint8) == 1, "Internal error, qint8 is misdefined");
 static_assert(sizeof(qint16)== 2, "Internal error, qint16 is misdefined");
 static_assert(sizeof(qint32) == 4, "Internal error, qint32 is misdefined");
 static_assert(sizeof(qint64) == 8, "Internal error, qint64 is misdefined");
+#ifdef QT_SUPPORTS_INT128
+static_assert(sizeof(qint128) == 16, "Internal error, qint128 is misdefined");
+#endif
+
+#ifdef QT_SUPPORTS_INT128
+// check that numeric_limits works:
+// This fails here for GCC 9, but succeeds on Clang and GCC >= 11
+// so just suppress the check for older GCC:
+#  if !defined(Q_CC_GNU_ONLY) || Q_CC_GNU >= 1100
+static_assert(std::numeric_limits<quint128>::max() == qint128(-1));
+#  endif
+#endif
 
 QT_END_NAMESPACE
diff --git a/tests/auto/corelib/global/qglobal/qglobal.c b/tests/auto/corelib/global/qglobal/qglobal.c
index 46745ef368..c8dbbc318f 100644
--- a/tests/auto/corelib/global/qglobal/qglobal.c
+++ b/tests/auto/corelib/global/qglobal/qglobal.c
@@ -4,6 +4,7 @@
 #include <QtCore/qglobal.h>
 #include <QtCore/qtversion.h>
 #include <QtCore/qyieldcpu.h>
+#include <QtCore/qtypes.h>
 
 #ifdef Q_COMPILER_THREAD_LOCAL
 #  include <threads.h>
@@ -50,6 +51,12 @@ void tst_GlobalTypes()
     qintptr qip;
     quintptr qup;
     Q_UNUSED(qs); Q_UNUSED(qp); Q_UNUSED(qip); Q_UNUSED(qup);
+
+#ifdef QT_SUPPORTS_INT128
+    qint128 s128;
+    quint128 u128;
+    Q_UNUSED(s128); Q_UNUSED(u128);
+#endif /* QT_SUPPORTS_INT128 */
 }
 
 /* Qt version */
diff --git a/tests/auto/corelib/global/qglobal/tst_qglobal.cpp b/tests/auto/corelib/global/qglobal/tst_qglobal.cpp
index 48b5714086..cf37b1ecb8 100644
--- a/tests/auto/corelib/global/qglobal/tst_qglobal.cpp
+++ b/tests/auto/corelib/global/qglobal/tst_qglobal.cpp
@@ -424,11 +424,17 @@ void tst_QGlobal::integerForSize()
     static_assert(sizeof(QIntegerForSize<2>::Signed) == 2);
     static_assert(sizeof(QIntegerForSize<4>::Signed) == 4);
     static_assert(sizeof(QIntegerForSize<8>::Signed) == 8);
+#ifdef QT_SUPPORTS_INT128
+    static_assert(sizeof(QIntegerForSize<16>::Signed) == 16);
+#endif
 
     static_assert(sizeof(QIntegerForSize<1>::Unsigned) == 1);
     static_assert(sizeof(QIntegerForSize<2>::Unsigned) == 2);
     static_assert(sizeof(QIntegerForSize<4>::Unsigned) == 4);
     static_assert(sizeof(QIntegerForSize<8>::Unsigned) == 8);
+#ifdef QT_SUPPORTS_INT128
+    static_assert(sizeof(QIntegerForSize<16>::Unsigned) == 16);
+#endif
 }
 
 typedef QPair<const char *, const char *> stringpair;