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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; Test that the memcpy library call simplifier works correctly.3;4; RUN: opt < %s -passes=instcombine -S | FileCheck %s5 6target 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"7 8declare ptr @memcpy(ptr, ptr, i32)9 10; Check memcpy(mem1, mem2, size) -> llvm.memcpy(mem1, mem2, size, 1).11 12define ptr @test_simplify1(ptr %mem1, ptr %mem2, i32 %size) {13; CHECK-LABEL: @test_simplify1(14; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[MEM1:%.*]], ptr align 1 [[MEM2:%.*]], i32 [[SIZE:%.*]], i1 false)15; CHECK-NEXT: ret ptr [[MEM1]]16;17 %ret = call ptr @memcpy(ptr %mem1, ptr %mem2, i32 %size)18 ret ptr %ret19}20 21; Verify that the strictfp attr doesn't block this optimization.22 23define ptr @test_simplify2(ptr %mem1, ptr %mem2, i32 %size) strictfp {24; CHECK-LABEL: @test_simplify2(25; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[MEM1:%.*]], ptr align 1 [[MEM2:%.*]], i32 [[SIZE:%.*]], i1 false) #[[ATTR0:[0-9]+]]26; CHECK-NEXT: ret ptr [[MEM1]]27;28 %ret = call ptr @memcpy(ptr %mem1, ptr %mem2, i32 %size) strictfp29 ret ptr %ret30}31 32; Verify that the first parameter to memcpy could itself be a call that's not33; tail, while the call to @memcpy could be tail.34declare ptr @get_dest()35 36define ptr @test_simplify3(ptr %mem2, i32 %size) {37; CHECK-LABEL: @test_simplify3(38; CHECK-NEXT: [[DEST:%.*]] = call ptr @get_dest()39; CHECK-NEXT: tail call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[DEST]], ptr align 1 [[MEM2:%.*]], i32 [[SIZE:%.*]], i1 false)40; CHECK-NEXT: ret ptr [[DEST]]41;42 43 %dest = call ptr @get_dest()44 %ret = tail call ptr @memcpy(ptr %dest, ptr %mem2, i32 %size)45 ret ptr %ret46}47 48define ptr @test_no_incompatible_attr(ptr %mem1, ptr %mem2, i32 %size) {49; CHECK-LABEL: @test_no_incompatible_attr(50; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[MEM1:%.*]], ptr align 1 [[MEM2:%.*]], i32 [[SIZE:%.*]], i1 false)51; CHECK-NEXT: ret ptr [[MEM1]]52;53 54 %ret = call dereferenceable(1) ptr @memcpy(ptr %mem1, ptr %mem2, i32 %size)55 ret ptr %ret56}57 58define ptr @test_no_simplify1(ptr %mem1, ptr %mem2, i32 %size) {59; CHECK-LABEL: @test_no_simplify1(60; CHECK-NEXT: [[RET:%.*]] = musttail call ptr @memcpy(ptr [[MEM1:%.*]], ptr [[MEM2:%.*]], i32 [[SIZE:%.*]])61; CHECK-NEXT: ret ptr [[RET]]62;63 %ret = musttail call ptr @memcpy(ptr %mem1, ptr %mem2, i32 %size)64 ret ptr %ret65}66