testsuite: Fix up consteval-prop21.C for 32-bit targets [PR115986]

The test fails on 32-bit targets (which don't support __int128 type).
Using unsigned long long instead still ICEs before the fix and passes
after it on those targets.

2024-07-29  Jakub Jelinek  <jakub@redhat.com>

	PR c++/115986
	* g++.dg/cpp2a/consteval-prop21.C (operator "" _c): Use
	unsigned long long rather than __uint128_t for return type if int128
	is unsupported.

diff --git a/gcc/testsuite/g++.dg/cpp2a/consteval-prop21.C b/gcc/testsuite/g++.dg/cpp2a/consteval-prop21.C
index debbda4f4259d41a9646bb79637c69431374caca..36da1bd91f3a86e6e2a1623d26dc4983fb276cc0 100644 (file)
--- a/gcc/testsuite/g++.dg/cpp2a/consteval-prop21.C
+++ b/gcc/testsuite/g++.dg/cpp2a/consteval-prop21.C
@@ -5,7 +5,13 @@ template <typename T>
 constexpr int b(T) {
   return 0;
 }
-consteval __uint128_t operator"" _c(const char*) { return 0; }
+consteval
+#ifdef __SIZEOF_INT128__
+__uint128_t
+#else
+unsigned long long
+#endif
+operator"" _c(const char*) { return 0; }
 constexpr char e() {
   long f = true ? 0 : b(long(1));
   return b(f);