https://bugs.llvm.org/show_bug.cgi?id=48787
Bug ID: 48787
Summary: Wrong size of arrays with over-aligned elements
Product: clang
Version: 11.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected]
Consider
__declspec(align(8)) typedef int Int[3];
struct Y {
Int y[3];
int i;
};
int f(void) {
return sizeof(struct Y);
}
msvc returns 40, clang returns 48 for the x86_64-pc-windows-msvc target.
Presumably because [1] rounds up the size to the alignment.
[1]
https://github.com/llvm/llvm-project/blob/689aaba7acf5778bfe96bfd7bc4f1f3ceed20dc8/clang/lib/AST/ASTContext.cpp#L1926-L1928
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