1 ; RUN: opt -instcombine -S < %s | FileCheck %s 2 3 target 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 5 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, 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: %2 = load float* %0, align 4, !tbaa !0 14 ; CHECK: store float %2, float* %1, align 4, !tbaa !0 15 ; CHECK: ret 16 define void @test1(%struct.test1* nocapture %a, %struct.test1* nocapture %b) { 17 entry: 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* %0, i8* %1, i64 4, i32 4, i1 false), !tbaa.struct !3 21 ret void 22 } 23 24 %struct.test2 = type { i32 (i8*, i32*, double*)** } 25 26 define 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* %tmp1, i8* undef, i64 8, i32 8, i1 false), !tbaa.struct !4 33 %tmp2 = getelementptr %struct.test2* %tmp, i32 0, i32 0 34 %tmp3 = load i32 (i8*, i32*, double*)*** %tmp2 35 ret i32 (i8*, i32*, double*)*** %tmp2 36 } 37 38 ; CHECK: !0 = metadata !{metadata !"float", metadata !1} 39 40 !0 = metadata !{metadata !"Simple C/C++ TBAA"} 41 !1 = metadata !{metadata !"omnipotent char", metadata !0} 42 !2 = metadata !{metadata !"float", metadata !0} 43 !3 = metadata !{i64 0, i64 4, metadata !2} 44 !4 = metadata !{i64 0, i64 8, null} 45
