1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals 2; RUN: opt -passes=instcombine -S < %s | FileCheck %s 3; 4; Verify that instcombine preserves TBAA tags when converting a memcpy into 5; a scalar load and store. 6 7target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 8 9declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind 10 11%A = type { float } 12 13define void @test1(ptr %a1, ptr %a2) { 14; CHECK-LABEL: @test1( 15; CHECK-NEXT: entry: 16; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[A2:%.*]], align 4, !tbaa [[TBAA0:![0-9]+]] 17; CHECK-NEXT: store i32 [[TMP0]], ptr [[A1:%.*]], align 4, !tbaa [[TBAA0]] 18; CHECK-NEXT: ret void 19; 20entry: 21 tail call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a1, ptr align 4 %a2, i64 4, i1 false), !tbaa !4 ; TAG_A 22 ret void 23} 24 25%B = type { ptr } 26 27define ptr @test2() { 28; CHECK-LABEL: @test2( 29; CHECK-NEXT: store i1 true, ptr poison, align 1 30; CHECK-NEXT: ret ptr poison 31; 32 %tmp = alloca %B, align 8 33 call void @llvm.memcpy.p0.p0.i64(ptr align 8 %tmp, ptr align 8 undef, i64 8, i1 false), !tbaa !7 ; TAG_B 34 %tmp3 = load ptr, ptr %tmp 35 ret ptr %tmp 36} 37 38!0 = !{!"root"} 39!1 = !{!0, !"char"} 40!2 = !{!1, !"float"} 41!3 = !{!1, i64 4, !"A", !2, i64 0, i64 4} 42!4 = !{!3, !3, i64 0, i64 4} 43!5 = !{!1, !"pointer"} 44!6 = !{!1, i64 8, !"B", !5, i64 0, i64 8} 45!7 = !{!6, !6, i64 0, i64 8} 46 47; Note that the memcpy() call in test2() transforms into an 48; undecorated 'store undef', so TAG_B is not present in the output. 49 50;. 51; CHECK: attributes #[[ATTR0:[0-9]+]] = { nocallback nofree nounwind willreturn memory(argmem: readwrite) } 52;. 53; CHECK: [[TBAA0]] = !{!1, !1, i64 0, i64 4} 54; CHECK: [[META1:![0-9]+]] = !{!2, i64 4, !"A", !4, i64 0, i64 4} 55; CHECK: [[META2:![0-9]+]] = !{!3, !"char"} 56; CHECK: [[META3:![0-9]+]] = !{!"root"} 57; CHECK: [[META4:![0-9]+]] = !{!2, !"float"} 58;. 59