[LLVMdev] llvm.memset.p0i8.* intrinsics

[Mario Schwalbe]

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Hi,

are the llvm.memset.p0i8.i32 and llvm.memset.p0i8.i64 intrinsics meant
to be used for 32-bit and 64-bit architectures, respectively depending
on the module's target datalayout? Or can I use any of them? If yes,
why are there two functions?
Sorry, if it's obvious, but the documentation wasn't that clear.

Thanks and ciao,
Mario
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[Caldarale, Charles R]

> From: llvmdev...@cs.uiuc.edu [mailto:llvmdev...@cs.uiuc.edu]
> On Behalf Of Mario Schwalbe
> Subject: [LLVMdev] llvm.memset.p0i8.* intrinsics

> are the llvm.memset.p0i8.i32 and llvm.memset.p0i8.i64 intrinsics meant
> to be used for 32-bit and 64-bit architectures, respectively

Not necessarily. If you look at the declarations:

declare void @llvm.memset.p0i8.i32(i8* <dest>, i8 <val>,
i32 <len>, i32 <align>, i1 <isvolatile>)
declare void @llvm.memset.p0i8.i64(i8* <dest>, i8 <val>,
i64 <len>, i32 <align>, i1 <isvolatile>)

you'll see that the i32 and i64 refer to the type of the length parameter. You should be able to use either.

- Chuck


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