[cfe-commits] r88996 - /cfe/trunk/test/CodeGenCXX/dyncast.cpp
Chris Lattner
clattner at apple.com
Sun Nov 22 06:50:37 PST 2009
On Nov 16, 2009, at 3:36 PM, Mike Stump wrote:
> Author: mrs
> Date: Mon Nov 16 17:36:30 2009
> New Revision: 88996
>
> URL: http://llvm.org/viewvc/llvm-project?rev=88996&view=rev
> Log:
> Testcase for dynamic_cast.
Actually, following up on the previous remark, I think this would make a lot more sense to be an executable test than a 'grep the generated IR' test. Would it make sense to put this sort of thing in llvm-test in SingleSource/UnitTests/C++ ?
The RTTI layout and vtable layout tests make sense to grep the generated IR since it's difficult to dynamically test all the interesting aspects of the vtable emission.
-Chris
>
> Added:
> cfe/trunk/test/CodeGenCXX/dyncast.cpp
>
> Added: cfe/trunk/test/CodeGenCXX/dyncast.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/dyncast.cpp?rev=88996&view=auto
>
> ==============================================================================
> --- cfe/trunk/test/CodeGenCXX/dyncast.cpp (added)
> +++ cfe/trunk/test/CodeGenCXX/dyncast.cpp Mon Nov 16 17:36:30 2009
> @@ -0,0 +1,413 @@
> +// RUN: clang-cc -I%S -triple x86_64-apple-darwin -std=c++0x -emit-llvm %s -o %t.ll
> +// RUN: FileCheck -check-prefix LL --input-file=%t.ll %s
> +
> +#include <typeinfo>
> +
> +class test1_A { virtual void f() { } };
> +class test1_B { virtual void g() { } };
> +class test1_D : public virtual test1_A, private test1_B {};
> +class test1_E : public test1_D, public test1_B {};
> +class test1_F : public test1_E, public test1_D {};
> +
> +extern test1_D test1_d;
> +extern test1_F test1_f;
> +
> +extern "C" int printf(const char *str...);
> +
> +#define S(V, N) if (V) printf("PASS: %d\n", N); else printf("FAIL: %d\n", N)
> +
> +void test1() {
> + test1_B* bp = (test1_B*)&test1_d;
> + test1_A* ap = &test1_d;
> + // This throws
> + // test1_D& dr = dynamic_cast<D&>(*bp);
> + test1_D* dp = dynamic_cast<test1_D*>(bp);
> + S(dp == 0, 1);
> + ap = dynamic_cast<test1_A*>(bp);
> + S(ap == 0, 2);
> + bp = dynamic_cast<test1_B*>(ap);
> + S(bp == 0, 3);
> + ap = dynamic_cast<test1_A*>(&test1_d);
> + S(ap != 0, 4);
> + // FIXME: Doesn't work yet, gcc fails this at comepile time
> + // bp = dynamic_cast<test1_B*>(&test1_d);
> + // S(bp == 0, 5);
> + {
> + test1_A* ap = &test1_f;
> + S(ap != 0, 6);
> + test1_D* dp = dynamic_cast<test1_D*>(ap);
> + S(dp == 0, 7);
> + // cast from virtual base
> + test1_E* ep1 = dynamic_cast<test1_E*>(ap);
> + S(ep1 != 0, 8);
> + }
> + dp = dynamic_cast<test1_D*>(&test1_d);
> + S(dp == &test1_d, 9);
> + const test1_D *cdp = dynamic_cast<const test1_D*>(&test1_d);
> + S(cdp == &test1_d, 10);
> + dp = dynamic_cast<test1_D*>((test1_A*)0);
> + S(dp == 0, 11);
> + ap = dynamic_cast<test1_A*>(&test1_d);
> + S(ap == (test1_A*)&test1_d, 12);
> + test1_E* ep = dynamic_cast<test1_E*>(&test1_f);
> + S(ep == (test1_E*)&test1_f, 13);
> + void *vp = dynamic_cast<void*>(ap);
> + S(vp == &test1_d, 14);
> + const void *cvp = dynamic_cast<const void*>(ap);
> + S(cvp == &test1_d, 15);
> +}
> +
> +// CHECK-LL: define void @_Z5test1v() nounwind {
> +// CHECK-LL-NEXT:entry:
> +// CHECK-LL-NEXT: %bp = alloca %class.test1_A*, align 8
> +// CHECK-LL-NEXT: %ap = alloca %class.test1_A*, align 8
> +// CHECK-LL-NEXT: %dp = alloca %class.test1_D*, align 8
> +// CHECK-LL-NEXT: %ap37 = alloca %class.test1_A*, align 8
> +// CHECK-LL-NEXT: %dp53 = alloca %class.test1_D*, align 8
> +// CHECK-LL-NEXT: %ep1 = alloca %class.test1_E*, align 8
> +// CHECK-LL-NEXT: %cdp = alloca %class.test1_D*, align 8
> +// CHECK-LL-NEXT: %ep = alloca %class.test1_E*, align 8
> +// CHECK-LL-NEXT: %vp = alloca i8*, align 8
> +// CHECK-LL-NEXT: %cvp = alloca i8*, align 8
> +// CHECK-LL-NEXT: br i1 false, label %cast.null, label %cast.notnull
> +// CHECK-LL: cast.notnull:
> +// CHECK-LL-NEXT: br label %cast.end
> +// CHECK-LL: cast.null:
> +// CHECK-LL-NEXT: br label %cast.end
> +// CHECK-LL: cast.end:
> +// CHECK-LL-NEXT: %0 = phi %class.test1_A* [ bitcast (%class.test1_D* @test1_d to %class.test1_A*), %cast.notnull ], [ null, %cast.null ]
> +// CHECK-LL-NEXT: store %class.test1_A* %0, %class.test1_A** %bp
> +// CHECK-LL-NEXT: br i1 false, label %cast.null2, label %cast.notnull1
> +// CHECK-LL: cast.notnull1:
> +// CHECK-LL-NEXT: %vtable = load i8** bitcast (%class.test1_D* @test1_d to i8**)
> +// CHECK-LL-NEXT: %vbase.offset.ptr = getelementptr i8* %vtable, i64 -24
> +// CHECK-LL-NEXT: %1 = bitcast i8* %vbase.offset.ptr to i64*
> +// CHECK-LL-NEXT: %vbase.offset = load i64* %1
> +// CHECK-LL-NEXT: %add.ptr = getelementptr i8* getelementptr inbounds (%class.test1_D* @test1_d, i32 0, i32 0, i32 0), i64 %vbase.offset
> +// CHECK-LL-NEXT: %2 = bitcast i8* %add.ptr to %class.test1_A*
> +// CHECK-LL-NEXT: br label %cast.end3
> +// CHECK-LL: cast.null2:
> +// CHECK-LL-NEXT: br label %cast.end3
> +// CHECK-LL: cast.end3:
> +// CHECK-LL-NEXT: %3 = phi %class.test1_A* [ %2, %cast.notnull1 ], [ null, %cast.null2 ]
> +// CHECK-LL-NEXT: store %class.test1_A* %3, %class.test1_A** %ap
> +// CHECK-LL-NEXT: %tmp = load %class.test1_A** %bp
> +// CHECK-LL-NEXT: %4 = icmp ne %class.test1_A* %tmp, null
> +// CHECK-LL-NEXT: br i1 %4, label %5, label %9
> +// CHECK-LL: ; <label>:5
> +// CHECK-LL-NEXT: %6 = bitcast %class.test1_A* %tmp to i8*
> +// CHECK-LL-NEXT: %7 = call i8* @__dynamic_cast(i8* %6, i8* bitcast (i8** @_ZTI7test1_B to i8*), i8* bitcast (i8** @_ZTI7test1_D to i8*), i64 -1)
> +// CHECK-LL-NEXT: %8 = bitcast i8* %7 to %class.test1_D*
> +// CHECK-LL-NEXT: br label %10
> +// CHECK-LL: ; <label>:9
> +// CHECK-LL-NEXT: br label %10
> +// CHECK-LL: ; <label>:10
> +// CHECK-LL-NEXT: %11 = phi %class.test1_D* [ %8, %5 ], [ null, %9 ]
> +// CHECK-LL-NEXT: store %class.test1_D* %11, %class.test1_D** %dp
> +// CHECK-LL-NEXT: %tmp4 = load %class.test1_D** %dp
> +// CHECK-LL-NEXT: %cmp = icmp eq %class.test1_D* %tmp4, null
> +// CHECK-LL-NEXT: br i1 %cmp, label %if.then, label %if.else
> +// CHECK-LL: if.then:
> +// CHECK-LL-NEXT: %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 1)
> +// CHECK-LL-NEXT: br label %if.end
> +// CHECK-LL: if.else:
> +// CHECK-LL-NEXT: %call5 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 1)
> +// CHECK-LL-NEXT: br label %if.end
> +// CHECK-LL: if.end:
> +// CHECK-LL-NEXT: %tmp6 = load %class.test1_A** %bp
> +// CHECK-LL-NEXT: %12 = icmp ne %class.test1_A* %tmp6, null
> +// CHECK-LL-NEXT: br i1 %12, label %13, label %17
> +// CHECK-LL: ; <label>:13
> +// CHECK-LL-NEXT: %14 = bitcast %class.test1_A* %tmp6 to i8*
> +// CHECK-LL-NEXT: %15 = call i8* @__dynamic_cast(i8* %14, i8* bitcast (i8** @_ZTI7test1_B to i8*), i8* bitcast (i8** @_ZTI7test1_A to i8*), i64 -1)
> +// CHECK-LL-NEXT: %16 = bitcast i8* %15 to %class.test1_A*
> +// CHECK-LL-NEXT: br label %18
> +// CHECK-LL: ; <label>:17
> +// CHECK-LL-NEXT: br label %18
> +// CHECK-LL: ; <label>:18
> +// CHECK-LL-NEXT: %19 = phi %class.test1_A* [ %16, %13 ], [ null, %17 ]
> +// CHECK-LL-NEXT: store %class.test1_A* %19, %class.test1_A** %ap
> +// CHECK-LL-NEXT: %tmp7 = load %class.test1_A** %ap
> +// CHECK-LL-NEXT: %cmp8 = icmp eq %class.test1_A* %tmp7, null
> +// CHECK-LL-NEXT: br i1 %cmp8, label %if.then9, label %if.else11
> +// CHECK-LL: if.then9:
> +// CHECK-LL-NEXT: %call10 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 2)
> +// CHECK-LL-NEXT: br label %if.end13
> +// CHECK-LL: if.else11:
> +// CHECK-LL-NEXT: %call12 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 2)
> +// CHECK-LL-NEXT: br label %if.end13
> +// CHECK-LL: if.end13:
> +// CHECK-LL-NEXT: %tmp14 = load %class.test1_A** %ap
> +// CHECK-LL-NEXT: %20 = icmp ne %class.test1_A* %tmp14, null
> +// CHECK-LL-NEXT: br i1 %20, label %21, label %25
> +// CHECK-LL: ; <label>:21
> +// CHECK-LL-NEXT: %22 = bitcast %class.test1_A* %tmp14 to i8*
> +// CHECK-LL-NEXT: %23 = call i8* @__dynamic_cast(i8* %22, i8* bitcast (i8** @_ZTI7test1_A to i8*), i8* bitcast (i8** @_ZTI7test1_B to i8*), i64 -1)
> +// CHECK-LL-NEXT: %24 = bitcast i8* %23 to %class.test1_A*
> +// CHECK-LL-NEXT: br label %26
> +// CHECK-LL: ; <label>:25
> +// CHECK-LL-NEXT: br label %26
> +// CHECK-LL: ; <label>:26
> +// CHECK-LL-NEXT: %27 = phi %class.test1_A* [ %24, %21 ], [ null, %25 ]
> +// CHECK-LL-NEXT: store %class.test1_A* %27, %class.test1_A** %bp
> +// CHECK-LL-NEXT: %tmp15 = load %class.test1_A** %bp
> +// CHECK-LL-NEXT: %cmp16 = icmp eq %class.test1_A* %tmp15, null
> +// CHECK-LL-NEXT: br i1 %cmp16, label %if.then17, label %if.else19
> +// CHECK-LL: if.then17:
> +// CHECK-LL-NEXT: %call18 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 3)
> +// CHECK-LL-NEXT: br label %if.end21
> +// CHECK-LL: if.else19:
> +// CHECK-LL-NEXT: %call20 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 3)
> +// CHECK-LL-NEXT: br label %if.end21
> +// CHECK-LL: if.end21:
> +// CHECK-LL-NEXT: br i1 false, label %cast.null27, label %cast.notnull22
> +// CHECK-LL: cast.notnull22:
> +// CHECK-LL-NEXT: %vtable23 = load i8** bitcast (%class.test1_D* @test1_d to i8**)
> +// CHECK-LL-NEXT: %vbase.offset.ptr24 = getelementptr i8* %vtable23, i64 -24
> +// CHECK-LL-NEXT: %28 = bitcast i8* %vbase.offset.ptr24 to i64*
> +// CHECK-LL-NEXT: %vbase.offset25 = load i64* %28
> +// CHECK-LL-NEXT: %add.ptr26 = getelementptr i8* getelementptr inbounds (%class.test1_D* @test1_d, i32 0, i32 0, i32 0), i64 %vbase.offset25
> +// CHECK-LL-NEXT: %29 = bitcast i8* %add.ptr26 to %class.test1_A*
> +// CHECK-LL-NEXT: br label %cast.end28
> +// CHECK-LL: cast.null27:
> +// CHECK-LL-NEXT: br label %cast.end28
> +// CHECK-LL: cast.end28:
> +// CHECK-LL-NEXT: %30 = phi %class.test1_A* [ %29, %cast.notnull22 ], [ null, %cast.null27 ]
> +// CHECK-LL-NEXT: store %class.test1_A* %30, %class.test1_A** %ap
> +// CHECK-LL-NEXT: %tmp29 = load %class.test1_A** %ap
> +// CHECK-LL-NEXT: %cmp30 = icmp ne %class.test1_A* %tmp29, null
> +// CHECK-LL-NEXT: br i1 %cmp30, label %if.then31, label %if.else33
> +// CHECK-LL: if.then31:
> +// CHECK-LL-NEXT: %call32 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 4)
> +// CHECK-LL-NEXT: br label %if.end35
> +// CHECK-LL: if.else33:
> +// CHECK-LL-NEXT: %call34 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 4)
> +// CHECK-LL-NEXT: br label %if.end35
> +// CHECK-LL: if.end35:
> +// CHECK-LL-NEXT: br i1 false, label %cast.null43, label %cast.notnull38
> +// CHECK-LL: cast.notnull38:
> +// CHECK-LL-NEXT: %vtable39 = load i8** bitcast (%class.test1_F* @test1_f to i8**)
> +// CHECK-LL-NEXT: %vbase.offset.ptr40 = getelementptr i8* %vtable39, i64 -24
> +// CHECK-LL-NEXT: %31 = bitcast i8* %vbase.offset.ptr40 to i64*
> +// CHECK-LL-NEXT: %vbase.offset41 = load i64* %31
> +// CHECK-LL-NEXT: %add.ptr42 = getelementptr i8* getelementptr inbounds (%class.test1_F* @test1_f, i32 0, i32 0, i32 0), i64 %vbase.offset41
> +// CHECK-LL-NEXT: %32 = bitcast i8* %add.ptr42 to %class.test1_A*
> +// CHECK-LL-NEXT: br label %cast.end44
> +// CHECK-LL: cast.null43:
> +// CHECK-LL-NEXT: br label %cast.end44
> +// CHECK-LL: cast.end44:
> +// CHECK-LL-NEXT: %33 = phi %class.test1_A* [ %32, %cast.notnull38 ], [ null, %cast.null43 ]
> +// CHECK-LL-NEXT: store %class.test1_A* %33, %class.test1_A** %ap37
> +// CHECK-LL-NEXT: %tmp45 = load %class.test1_A** %ap37
> +// CHECK-LL-NEXT: %cmp46 = icmp ne %class.test1_A* %tmp45, null
> +// CHECK-LL-NEXT: br i1 %cmp46, label %if.then47, label %if.else49
> +// CHECK-LL: if.then47:
> +// CHECK-LL-NEXT: %call48 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 6)
> +// CHECK-LL-NEXT: br label %if.end51
> +// CHECK-LL: if.else49:
> +// CHECK-LL-NEXT: %call50 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 6)
> +// CHECK-LL-NEXT: br label %if.end51
> +// CHECK-LL: if.end51:
> +// CHECK-LL-NEXT: %tmp54 = load %class.test1_A** %ap37
> +// CHECK-LL-NEXT: %34 = icmp ne %class.test1_A* %tmp54, null
> +// CHECK-LL-NEXT: br i1 %34, label %35, label %39
> +// CHECK-LL: ; <label>:35
> +// CHECK-LL-NEXT: %36 = bitcast %class.test1_A* %tmp54 to i8*
> +// CHECK-LL-NEXT: %37 = call i8* @__dynamic_cast(i8* %36, i8* bitcast (i8** @_ZTI7test1_A to i8*), i8* bitcast (i8** @_ZTI7test1_D to i8*), i64 -1)
> +// CHECK-LL-NEXT: %38 = bitcast i8* %37 to %class.test1_D*
> +// CHECK-LL-NEXT: br label %40
> +// CHECK-LL: ; <label>:39
> +// CHECK-LL-NEXT: br label %40
> +// CHECK-LL: ; <label>:40
> +// CHECK-LL-NEXT: %41 = phi %class.test1_D* [ %38, %35 ], [ null, %39 ]
> +// CHECK-LL-NEXT: store %class.test1_D* %41, %class.test1_D** %dp53
> +// CHECK-LL-NEXT: %tmp55 = load %class.test1_D** %dp53
> +// CHECK-LL-NEXT: %cmp56 = icmp eq %class.test1_D* %tmp55, null
> +// CHECK-LL-NEXT: br i1 %cmp56, label %if.then57, label %if.else59
> +// CHECK-LL: if.then57:
> +// CHECK-LL-NEXT: %call58 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 7)
> +// CHECK-LL-NEXT: br label %if.end61
> +// CHECK-LL: if.else59:
> +// CHECK-LL-NEXT: %call60 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 7)
> +// CHECK-LL-NEXT: br label %if.end61
> +// CHECK-LL: if.end61:
> +// CHECK-LL-NEXT: %tmp63 = load %class.test1_A** %ap37
> +// CHECK-LL-NEXT: %42 = icmp ne %class.test1_A* %tmp63, null
> +// CHECK-LL-NEXT: br i1 %42, label %43, label %47
> +// CHECK-LL: ; <label>:43
> +// CHECK-LL-NEXT: %44 = bitcast %class.test1_A* %tmp63 to i8*
> +// CHECK-LL-NEXT: %45 = call i8* @__dynamic_cast(i8* %44, i8* bitcast (i8** @_ZTI7test1_A to i8*), i8* bitcast (i8** @_ZTI7test1_E to i8*), i64 -1)
> +// CHECK-LL-NEXT: %46 = bitcast i8* %45 to %class.test1_E*
> +// CHECK-LL-NEXT: br label %48
> +// CHECK-LL: ; <label>:47
> +// CHECK-LL-NEXT: br label %48
> +// CHECK-LL: ; <label>:48
> +// CHECK-LL-NEXT: %49 = phi %class.test1_E* [ %46, %43 ], [ null, %47 ]
> +// CHECK-LL-NEXT: store %class.test1_E* %49, %class.test1_E** %ep1
> +// CHECK-LL-NEXT: %tmp64 = load %class.test1_E** %ep1
> +// CHECK-LL-NEXT: %cmp65 = icmp ne %class.test1_E* %tmp64, null
> +// CHECK-LL-NEXT: br i1 %cmp65, label %if.then66, label %if.else68
> +// CHECK-LL: if.then66:
> +// CHECK-LL-NEXT: %call67 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 8)
> +// CHECK-LL-NEXT: br label %if.end70
> +// CHECK-LL: if.else68:
> +// CHECK-LL-NEXT: %call69 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 8)
> +// CHECK-LL-NEXT: br label %if.end70
> +// CHECK-LL: if.end70:
> +// CHECK-LL-NEXT: store %class.test1_D* @test1_d, %class.test1_D** %dp
> +// CHECK-LL-NEXT: %tmp71 = load %class.test1_D** %dp
> +// CHECK-LL-NEXT: %cmp72 = icmp eq %class.test1_D* %tmp71, @test1_d
> +// CHECK-LL-NEXT: br i1 %cmp72, label %if.then73, label %if.else75
> +// CHECK-LL: if.then73:
> +// CHECK-LL-NEXT: %call74 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 9)
> +// CHECK-LL-NEXT: br label %if.end77
> +// CHECK-LL: if.else75:
> +// CHECK-LL-NEXT: %call76 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 9)
> +// CHECK-LL-NEXT: br label %if.end77
> +// CHECK-LL: if.end77:
> +// CHECK-LL-NEXT: store %class.test1_D* @test1_d, %class.test1_D** %cdp
> +// CHECK-LL-NEXT: %tmp79 = load %class.test1_D** %cdp
> +// CHECK-LL-NEXT: %cmp80 = icmp eq %class.test1_D* %tmp79, @test1_d
> +// CHECK-LL-NEXT: br i1 %cmp80, label %if.then81, label %if.else83
> +// CHECK-LL: if.then81:
> +// CHECK-LL-NEXT: %call82 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 10)
> +// CHECK-LL-NEXT: br label %if.end85
> +// CHECK-LL: if.else83:
> +// CHECK-LL-NEXT: %call84 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 10)
> +// CHECK-LL-NEXT: br label %if.end85
> +// CHECK-LL: if.end85:
> +// CHECK-LL-NEXT: br i1 false, label %50, label %53
> +// CHECK-LL: ; <label>:50
> +// CHECK-LL-NEXT: %51 = call i8* @__dynamic_cast(i8* null, i8* bitcast (i8** @_ZTI7test1_A to i8*), i8* bitcast (i8** @_ZTI7test1_D to i8*), i64 -1)
> +// CHECK-LL-NEXT: %52 = bitcast i8* %51 to %class.test1_D*
> +// CHECK-LL-NEXT: br label %54
> +// CHECK-LL: ; <label>:53
> +// CHECK-LL-NEXT: br label %54
> +// CHECK-LL: ; <label>:54
> +// CHECK-LL-NEXT: %55 = phi %class.test1_D* [ %52, %50 ], [ null, %53 ]
> +// CHECK-LL-NEXT: store %class.test1_D* %55, %class.test1_D** %dp
> +// CHECK-LL-NEXT: %tmp86 = load %class.test1_D** %dp
> +// CHECK-LL-NEXT: %cmp87 = icmp eq %class.test1_D* %tmp86, null
> +// CHECK-LL-NEXT: br i1 %cmp87, label %if.then88, label %if.else90
> +// CHECK-LL: if.then88:
> +// CHECK-LL-NEXT: %call89 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 11)
> +// CHECK-LL-NEXT: br label %if.end92
> +// CHECK-LL: if.else90:
> +// CHECK-LL-NEXT: %call91 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 11)
> +// CHECK-LL-NEXT: br label %if.end92
> +// CHECK-LL: if.end92:
> +// CHECK-LL-NEXT: br i1 false, label %cast.null98, label %cast.notnull93
> +// CHECK-LL: cast.notnull93:
> +// CHECK-LL-NEXT: %vtable94 = load i8** bitcast (%class.test1_D* @test1_d to i8**)
> +// CHECK-LL-NEXT: %vbase.offset.ptr95 = getelementptr i8* %vtable94, i64 -24
> +// CHECK-LL-NEXT: %56 = bitcast i8* %vbase.offset.ptr95 to i64*
> +// CHECK-LL-NEXT: %vbase.offset96 = load i64* %56
> +// CHECK-LL-NEXT: %add.ptr97 = getelementptr i8* getelementptr inbounds (%class.test1_D* @test1_d, i32 0, i32 0, i32 0), i64 %vbase.offset96
> +// CHECK-LL-NEXT: %57 = bitcast i8* %add.ptr97 to %class.test1_A*
> +// CHECK-LL-NEXT: br label %cast.end99
> +// CHECK-LL: cast.null98:
> +// CHECK-LL-NEXT: br label %cast.end99
> +// CHECK-LL: cast.end99:
> +// CHECK-LL-NEXT: %58 = phi %class.test1_A* [ %57, %cast.notnull93 ], [ null, %cast.null98 ]
> +// CHECK-LL-NEXT: store %class.test1_A* %58, %class.test1_A** %ap
> +// CHECK-LL-NEXT: %tmp100 = load %class.test1_A** %ap
> +// CHECK-LL-NEXT: br i1 false, label %cast.null106, label %cast.notnull101
> +// CHECK-LL: cast.notnull101:
> +// CHECK-LL-NEXT: %vtable102 = load i8** bitcast (%class.test1_D* @test1_d to i8**)
> +// CHECK-LL-NEXT: %vbase.offset.ptr103 = getelementptr i8* %vtable102, i64 -24
> +// CHECK-LL-NEXT: %59 = bitcast i8* %vbase.offset.ptr103 to i64*
> +// CHECK-LL-NEXT: %vbase.offset104 = load i64* %59
> +// CHECK-LL-NEXT: %add.ptr105 = getelementptr i8* getelementptr inbounds (%class.test1_D* @test1_d, i32 0, i32 0, i32 0), i64 %vbase.offset104
> +// CHECK-LL-NEXT: %60 = bitcast i8* %add.ptr105 to %class.test1_A*
> +// CHECK-LL-NEXT: br label %cast.end107
> +// CHECK-LL: cast.null106:
> +// CHECK-LL-NEXT: br label %cast.end107
> +// CHECK-LL: cast.end107:
> +// CHECK-LL-NEXT: %61 = phi %class.test1_A* [ %60, %cast.notnull101 ], [ null, %cast.null106 ]
> +// CHECK-LL-NEXT: %cmp108 = icmp eq %class.test1_A* %tmp100, %61
> +// CHECK-LL-NEXT: br i1 %cmp108, label %if.then109, label %if.else111
> +// CHECK-LL: if.then109:
> +// CHECK-LL-NEXT: %call110 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 12)
> +// CHECK-LL-NEXT: br label %if.end113
> +// CHECK-LL: if.else111:
> +// CHECK-LL-NEXT: %call112 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 12)
> +// CHECK-LL-NEXT: br label %if.end113
> +// CHECK-LL: if.end113:
> +// CHECK-LL-NEXT: br i1 false, label %cast.null116, label %cast.notnull115
> +// CHECK-LL: cast.notnull115:
> +// CHECK-LL-NEXT: br label %cast.end117
> +// CHECK-LL: cast.null116:
> +// CHECK-LL-NEXT: br label %cast.end117
> +// CHECK-LL: cast.end117:
> +// CHECK-LL-NEXT: %62 = phi %class.test1_E* [ bitcast (%class.test1_F* @test1_f to %class.test1_E*), %cast.notnull115 ], [ null, %cast.null116 ]
> +// CHECK-LL-NEXT: store %class.test1_E* %62, %class.test1_E** %ep
> +// CHECK-LL-NEXT: %tmp118 = load %class.test1_E** %ep
> +// CHECK-LL-NEXT: br i1 false, label %cast.null120, label %cast.notnull119
> +// CHECK-LL: cast.notnull119:
> +// CHECK-LL-NEXT: br label %cast.end121
> +// CHECK-LL: cast.null120:
> +// CHECK-LL-NEXT: br label %cast.end121
> +// CHECK-LL: cast.end121:
> +// CHECK-LL-NEXT: %63 = phi %class.test1_E* [ bitcast (%class.test1_F* @test1_f to %class.test1_E*), %cast.notnull119 ], [ null, %cast.null120 ]
> +// CHECK-LL-NEXT: %cmp122 = icmp eq %class.test1_E* %tmp118, %63
> +// CHECK-LL-NEXT: br i1 %cmp122, label %if.then123, label %if.else125
> +// CHECK-LL: if.then123:
> +// CHECK-LL-NEXT: %call124 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 13)
> +// CHECK-LL-NEXT: br label %if.end127
> +// CHECK-LL: if.else125:
> +// CHECK-LL-NEXT: %call126 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 13)
> +// CHECK-LL-NEXT: br label %if.end127
> +// CHECK-LL: if.end127:
> +// CHECK-LL-NEXT: %tmp129 = load %class.test1_A** %ap
> +// CHECK-LL-NEXT: %64 = icmp ne %class.test1_A* %tmp129, null
> +// CHECK-LL-NEXT: br i1 %64, label %65, label %70
> +// CHECK-LL: ; <label>:65
> +// CHECK-LL-NEXT: %66 = bitcast %class.test1_A* %tmp129 to i64**
> +// CHECK-LL-NEXT: %vtable130 = load i64** %66
> +// CHECK-LL-NEXT: %67 = getelementptr inbounds i64* %vtable130, i64 -2
> +// CHECK-LL-NEXT: %"offset to top" = load i64* %67
> +// CHECK-LL-NEXT: %68 = bitcast %class.test1_A* %tmp129 to i8*
> +// CHECK-LL-NEXT: %69 = getelementptr inbounds i8* %68, i64 %"offset to top"
> +// CHECK-LL-NEXT: br label %71
> +// CHECK-LL: ; <label>:70
> +// CHECK-LL-NEXT: br label %71
> +// CHECK-LL: ; <label>:71
> +// CHECK-LL-NEXT: %72 = phi i8* [ %69, %65 ], [ null, %70 ]
> +// CHECK-LL-NEXT: store i8* %72, i8** %vp
> +// CHECK-LL-NEXT: %tmp131 = load i8** %vp
> +// CHECK-LL-NEXT: %cmp132 = icmp eq i8* %tmp131, getelementptr inbounds (%class.test1_D* @test1_d, i32 0, i32 0, i32 0)
> +// CHECK-LL-NEXT: br i1 %cmp132, label %if.then133, label %if.else135
> +// CHECK-LL: if.then133:
> +// CHECK-LL-NEXT: %call134 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 14)
> +// CHECK-LL-NEXT: br label %if.end137
> +// CHECK-LL: if.else135:
> +// CHECK-LL-NEXT: %call136 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 14)
> +// CHECK-LL-NEXT: br label %if.end137
> +// CHECK-LL: if.end137:
> +// CHECK-LL-NEXT: %tmp139 = load %class.test1_A** %ap
> +// CHECK-LL-NEXT: %73 = icmp ne %class.test1_A* %tmp139, null
> +// CHECK-LL-NEXT: br i1 %73, label %74, label %79
> +// CHECK-LL: ; <label>:74
> +// CHECK-LL-NEXT: %75 = bitcast %class.test1_A* %tmp139 to i64**
> +// CHECK-LL-NEXT: %vtable140 = load i64** %75
> +// CHECK-LL-NEXT: %76 = getelementptr inbounds i64* %vtable140, i64 -2
> +// CHECK-LL-NEXT: %"offset to top141" = load i64* %76
> +// CHECK-LL-NEXT: %77 = bitcast %class.test1_A* %tmp139 to i8*
> +// CHECK-LL-NEXT: %78 = getelementptr inbounds i8* %77, i64 %"offset to top141"
> +// CHECK-LL-NEXT: br label %80
> +// CHECK-LL: ; <label>:79
> +// CHECK-LL-NEXT: br label %80
> +// CHECK-LL: ; <label>:80
> +// CHECK-LL-NEXT: %81 = phi i8* [ %78, %74 ], [ null, %79 ]
> +// CHECK-LL-NEXT: store i8* %81, i8** %cvp
> +// CHECK-LL-NEXT: %tmp142 = load i8** %cvp
> +// CHECK-LL-NEXT: %cmp143 = icmp eq i8* %tmp142, getelementptr inbounds (%class.test1_D* @test1_d, i32 0, i32 0, i32 0)
> +// CHECK-LL-NEXT: br i1 %cmp143, label %if.then144, label %if.else146
> +// CHECK-LL: if.then144:
> +// CHECK-LL-NEXT: %call145 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str, i32 0, i32 0), i32 15)
> +// CHECK-LL-NEXT: br label %if.end148
> +// CHECK-LL: if.else146:
> +// CHECK-LL-NEXT: %call147 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.str1, i32 0, i32 0), i32 15)
> +// CHECK-LL-NEXT: br label %if.end148
> +// CHECK-LL: if.end148:
> +// CHECK-LL-NEXT: ret void
>
>
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