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