1; RUN: opt -instcombine -S < %s | FileCheck %s 2 3target 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" 4 5declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind 6 7; Verify that instcombine preserves TBAA tags when converting a memcpy into 8; a scalar load and store. 9 10%struct.test1 = type { float } 11 12; CHECK: @test 13; CHECK: %[[LOAD:.*]] = load i32, i32* %{{.*}}, align 4, !tbaa !0 14; CHECK: store i32 %[[LOAD:.*]], i32* %{{.*}}, align 4, !tbaa !0 15; CHECK: ret 16define void @test1(%struct.test1* nocapture %a, %struct.test1* nocapture %b) { 17entry: 18 %0 = bitcast %struct.test1* %a to i8* 19 %1 = bitcast %struct.test1* %b to i8* 20 tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %0, i8* align 4 %1, i64 4, i1 false), !tbaa.struct !3 21 ret void 22} 23 24%struct.test2 = type { i32 (i8*, i32*, double*)** } 25 26define i32 (i8*, i32*, double*)*** @test2() { 27; CHECK-LABEL: @test2( 28; CHECK-NOT: memcpy 29; CHECK: ret 30 %tmp = alloca %struct.test2, align 8 31 %tmp1 = bitcast %struct.test2* %tmp to i8* 32 call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %tmp1, i8* align 8 undef, i64 8, i1 false), !tbaa.struct !4 33 %tmp2 = getelementptr %struct.test2, %struct.test2* %tmp, i32 0, i32 0 34 %tmp3 = load i32 (i8*, i32*, double*)**, i32 (i8*, i32*, double*)*** %tmp2 35 ret i32 (i8*, i32*, double*)*** %tmp2 36} 37 38; CHECK: !0 = !{!1, !1, i64 0} 39; CHECK: !1 = !{!"float", !2} 40 41!0 = !{!"Simple C/C++ TBAA"} 42!1 = !{!"omnipotent char", !0} 43!2 = !{!5, !5, i64 0} 44!3 = !{i64 0, i64 4, !2} 45!4 = !{i64 0, i64 8, null} 46!5 = !{!"float", !0} 47