1; Test that the memmove library call simplifier works correctly. 2; 3; RUN: opt < %s -passes=instcombine -S | FileCheck %s 4 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.memmove 15 ret ptr %ret 16; CHECK: ret ptr %mem1 17} 18 19define ptr @test_simplify2(ptr %mem1, ptr %mem2, i32 %size) { 20; CHECK-LABEL: @test_simplify2( 21; CHECK-NEXT: tail call void @llvm.memmove 22; CHECK-NEXT: ret ptr %mem1 23 %ret = tail call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size) 24 ret ptr %ret 25} 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 %ret 31 %ret = musttail call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size) 32 ret ptr %ret 33} 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.memmove 39 ret ptr %ret 40; CHECK: ret ptr %mem1 41} 42