This fixes PR8256 and some others.
llvm-svn: 186385
unsigned ConstantArrayType::getMaxSizeBits(ASTContext &Context) {
unsigned Bits = Context.getTypeSize(Context.getSizeType());
- // GCC appears to only allow 63 bits worth of address space when compiling
- // for 64-bit, so we do the same.
- if (Bits == 64)
- --Bits;
-
+ // Limit the number of bits in size_t so that maximal bit size fits 64 bit
+ // integer (see PR8256). We can do this as currently there is no hardware
+ // that supports full 64-bit virtual space.
+ if (Bits > 61)
+ Bits = 61;
+
return Bits;
}
void f() {
int a[2147483647U][2147483647U]; // expected-error{{array is too large}}
- int b[1073741825U - 1U][2147483647U];
- int c[18446744073709551615U/sizeof(int)/2];
+ int b[1073741825U - 1U][2147483647U]; // expected-error{{array is too large}}
}
+
+void pr8256 () {
+ typedef char a[1LL<<61]; // expected-error {{array is too large}}
+ typedef char b[(long long)sizeof(a)-1];
+}
+
// PR15216
// Don't crash when taking computing the offset of structs with large arrays.
-const unsigned long Size = (1l << 62);
+const unsigned long Size = (1l << 60);
struct Chunk1 {
char padding[Size];