llvm-6502/test/Transforms/InstCombine/memcpy.ll

; RUN: opt < %s -instcombine -S | FileCheck %s

declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind

define void @test1(i8* %a) {
        tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 false)
        ret void
; CHECK: define void @test1
; CHECK-NEXT: ret void
}


; PR8267
define void @test2(i8* %a) {
        tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 true)
        ret void
; CHECK: define void @test2
; CHECK-NEXT: call void @llvm.memcpy
}
Slightly generalize transformation of memmove(a,a,n) so that it also applies to memcpy. (Such a memcpy is technically illegal, but in practice is safe and is generated by struct self-assignment in C code.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91621 91177308-0d34-0410-b5e6-96231b3b80d8 2009-12-17 21:07:31 +00:00			`; RUN: opt < %s -instcombine -S \| FileCheck %s`

upgrade this test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115295 91177308-0d34-0410-b5e6-96231b3b80d8 2010-10-01 05:47:16 +00:00			`declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind`
Slightly generalize transformation of memmove(a,a,n) so that it also applies to memcpy. (Such a memcpy is technically illegal, but in practice is safe and is generated by struct self-assignment in C code.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91621 91177308-0d34-0410-b5e6-96231b3b80d8 2009-12-17 21:07:31 +00:00
fix PR8267 - Instcombine shouldn't optimizer away volatile memcpy's. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115296 91177308-0d34-0410-b5e6-96231b3b80d8 2010-10-01 05:51:02 +00:00			`define void @test1(i8* %a) {`
upgrade this test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115295 91177308-0d34-0410-b5e6-96231b3b80d8 2010-10-01 05:47:16 +00:00			`tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 false)`
Slightly generalize transformation of memmove(a,a,n) so that it also applies to memcpy. (Such a memcpy is technically illegal, but in practice is safe and is generated by struct self-assignment in C code.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91621 91177308-0d34-0410-b5e6-96231b3b80d8 2009-12-17 21:07:31 +00:00			`ret void`
fix PR8267 - Instcombine shouldn't optimizer away volatile memcpy's. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115296 91177308-0d34-0410-b5e6-96231b3b80d8 2010-10-01 05:51:02 +00:00			`; CHECK: define void @test1`
Slightly generalize transformation of memmove(a,a,n) so that it also applies to memcpy. (Such a memcpy is technically illegal, but in practice is safe and is generated by struct self-assignment in C code.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91621 91177308-0d34-0410-b5e6-96231b3b80d8 2009-12-17 21:07:31 +00:00			`; CHECK-NEXT: ret void`
fix PR8267 - Instcombine shouldn't optimizer away volatile memcpy's. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115296 91177308-0d34-0410-b5e6-96231b3b80d8 2010-10-01 05:51:02 +00:00			`}`


			`; PR8267`
			`define void @test2(i8* %a) {`
			`tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 true)`
			`ret void`
			`; CHECK: define void @test2`
			`; CHECK-NEXT: call void @llvm.memcpy`
			`}`