https://bugs.llvm.org/show_bug.cgi?id=44527
Bug ID: 44527
Summary: [clang] 'align_value' attribute not added to variables
in types (LLVM type can't express it?)
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
typedef double * aligned_double_ptr __attribute__((align_value(64)));
struct S {
aligned_double_ptr y;
};
void foo(S*s){
s->y = 0;
}
As per https://godbolt.org/z/PtLP2e
we get
%struct.S = type { double* }
define dso_local void @_Z3fooP1S(%struct.S* nocapture %0) local_unnamed_addr #0
{
%2 = getelementptr inbounds %struct.S, %struct.S* %0, i64 0, i32 0
store double* null, double** %2, align 8, !tbaa !2
ret void
}
So the alignment info did not reach IR.
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