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1; Test that the memmove library call simplifier works correctly.2;3; RUN: opt < %s -passes=instcombine -S | FileCheck %s4 5target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"6 7declare ptr @memmove(ptr, ptr, i32)8 9; Check memmove(mem1, mem2, size) -> llvm.memmove(mem1, mem2, size, 1).10 11define ptr @test_simplify1(ptr %mem1, ptr %mem2, i32 %size) {12; CHECK-LABEL: @test_simplify1(13 %ret = call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)14; CHECK: call void @llvm.memmove15 ret ptr %ret16; CHECK: ret ptr %mem117}18 19define ptr @test_simplify2(ptr %mem1, ptr %mem2, i32 %size) {20; CHECK-LABEL: @test_simplify2(21; CHECK-NEXT: tail call void @llvm.memmove22; CHECK-NEXT: ret ptr %mem123 %ret = tail call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)24 ret ptr %ret25}26 27define ptr @test_no_simplify1(ptr %mem1, ptr %mem2, i32 %size) {28; CHECK-LABEL: @test_no_simplify1(29; CHECK-NEXT: %ret = musttail call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)30; CHECK-NEXT: ret ptr %ret31 %ret = musttail call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)32 ret ptr %ret33}34 35define ptr @test_no_incompatible_attr(ptr %mem1, ptr %mem2, i32 %size) {36; CHECK-LABEL: @test_no_incompatible_attr(37 %ret = call dereferenceable(1) ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)38; CHECK: call void @llvm.memmove39 ret ptr %ret40; CHECK: ret ptr %mem141}42