Hi Chris,
> ArgPromotion does do this, and I added a testcase to verify it. It
> looks like it recomputes the Function's param attrs perfectly and just
> applies that attr list to all calls.
try this example. Argpromotion deletes the zeroext attribute on the call.
; RUN: llvm-as < %s | opt -argpromotion | llvm-dis | grep zeroext
%struct.ss = type { i32, i64 }
define internal void @f(%struct.ss* byval %b, i32* byval %X, i32 %i) nounwind
{
entry:
%tmp = getelementptr %struct.ss* %b, i32 0, i32 0
%tmp1 = load i32* %tmp, align 4
%tmp2 = add i32 %tmp1, 1
store i32 %tmp2, i32* %tmp, align 4
store i32 0, i32* %X
ret void
}
define i32 @test(i32* %X) {
entry:
%S = alloca %struct.ss ; <%struct.ss*> [#uses=4]
%tmp1 = getelementptr %struct.ss* %S, i32 0, i32 0 ;
<i32*> [#uses=1]
store i32 1, i32* %tmp1, align 8
%tmp4 = getelementptr %struct.ss* %S, i32 0, i32 1 ;
<i64*> [#uses=1]
store i64 2, i64* %tmp4, align 4
call void @f( %struct.ss* byval %S, i32* byval %X, i32 zeroext 0)
ret i32 0
}
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