Fix array sizes where address space is not yet known
For variables in generic address spaces, for example:
```
unsigned char V[6442450944];
...
```
the address space is not yet known when we get into
*getConstantArrayType*, it is 0. AMDGCN target's
address space 0 has 32 bits pointers, so when we
call *getPointerWidth* with 0, the array size is
trimmed to 32 bits, which is not right.
Differential Revision: https://reviews.llvm.org/D30845
llvm-svn: 298420
diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index e8f9892..071537a 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -2692,8 +2692,7 @@
// Convert the array size into a canonical width matching the pointer size for
// the target.
llvm::APInt ArySize(ArySizeIn);
- ArySize =
- ArySize.zextOrTrunc(Target->getPointerWidth(getTargetAddressSpace(EltTy)));
+ ArySize = ArySize.zextOrTrunc(Target->getMaxPointerWidth());
llvm::FoldingSetNodeID ID;
ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals);