[clang] [clang][ExprConst] Consider integer pointers of value 0 nullptr (PR #150164)

[Timm Baeder via cfe-commits]

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@@ -27,12 +27,6 @@ template void f<B{nullptr}>();
 // CHECK: define weak_odr void @_Z1fIXtl1BLPKi32EEEEvv(
 // MSABI: define {{.*}} @"??$f@$2UB@@PEBH0CA at H0A@@@@YAXXZ"
 template void f<B{fold((int*)32)}>();
-#ifndef _WIN32
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tbaederr wrote:

Not sure I understand, with this patch, `template void f<B{fold(reinterpret_cast<int*>(0))}>();` is equivalent to the `template void f<B{nullptr}>();` from line 25, so this test causes a second explicit template instantiation.

https://github.com/llvm/llvm-project/pull/150164