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; RUN: opt %s -instcombine | llvm-dis
@X = global i8 0 ; <i8*> [#uses=3]
@Y = global i8 12 ; <i8*> [#uses=2]
declare void @llvm.memmove.i32(i8*, i8*, i32, i32)
declare void @llvm.memcpy.i32(i8*, i8*, i32, i32)
declare void @llvm.memset.i32(i8*, i8, i32, i32)
define void @zero_byte_test() {
; These process zero bytes, so they are a noop.
call void @llvm.memmove.i32( i8* @X, i8* @Y, i32 0, i32 100 )
call void @llvm.memcpy.i32( i8* @X, i8* @Y, i32 0, i32 100 )
call void @llvm.memset.i32( i8* @X, i8 123, i32 0, i32 100 )
ret void
}
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