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ef2509b3ba
1. x86-64 byval alignment should be max of 8 and alignment of type. Previously the code was not doing what the commit message was saying. 2. Do not use byte repeat move and store operations. These are slow. llvm-svn: 55139
26 lines
832 B
LLVM
26 lines
832 B
LLVM
; RUN: llvm-as < %s | llc -march=x86 -mtriple=i686-pc-linux-gnu | grep movs | count 1
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@A = global [32 x i32] zeroinitializer
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@B = global [32 x i32] zeroinitializer
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declare void @llvm.memcpy.i32(i8*, i8*, i32, i32)
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define void @main() nounwind {
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; dword copy
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call void @llvm.memcpy.i32(i8* bitcast ([32 x i32]* @A to i8*),
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i8* bitcast ([32 x i32]* @B to i8*),
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i32 128, i32 4 )
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; word copy
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call void @llvm.memcpy.i32( i8* bitcast ([32 x i32]* @A to i8*),
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i8* bitcast ([32 x i32]* @B to i8*),
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i32 128, i32 2 )
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; byte copy
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call void @llvm.memcpy.i32( i8* bitcast ([32 x i32]* @A to i8*),
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i8* bitcast ([32 x i32]* @B to i8*),
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i32 128, i32 1 )
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ret void
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}
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