| Peter Collingbourne | 7a1e5bb | 2016-12-09 00:33:27 +0000 | [diff] [blame] | 1 | ; RUN: opt -S -wholeprogramdevirt %s | FileCheck %s |
| 2 | |
| 3 | target datalayout = "e-p:64:64" |
| 4 | target triple = "x86_64-unknown-linux-gnu" |
| 5 | |
| 6 | %vtTy = type { void (i8*)* } |
| 7 | |
| 8 | @vt = constant %vtTy { void (i8*)* @vf }, !type !0 |
| 9 | |
| 10 | define void @vf(i8* %this) { |
| 11 | ret void |
| 12 | } |
| 13 | |
| 14 | ; CHECK: define void @call |
| 15 | define void @call(i8* %obj) { |
| 16 | %vtableptr = bitcast i8* %obj to [1 x i8*]** |
| 17 | %vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr |
| 18 | %vtablei8 = bitcast [1 x i8*]* %vtable to i8* |
| 19 | %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid") |
| 20 | call void @llvm.assume(i1 %p) |
| 21 | %fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 0 |
| 22 | %fptr = load i8*, i8** %fptrptr |
| 23 | %fptr_casted = bitcast i8* %fptr to void (i8*)* |
| 24 | ; CHECK: call void @vf( |
| 25 | call void %fptr_casted(i8* %obj) |
| 26 | ret void |
| 27 | } |
| 28 | |
| 29 | ; CHECK: define void @call_oob |
| 30 | define void @call_oob(i8* %obj) { |
| 31 | %vtableptr = bitcast i8* %obj to [1 x i8*]** |
| 32 | %vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr |
| 33 | %vtablei8 = bitcast [1 x i8*]* %vtable to i8* |
| 34 | %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid") |
| 35 | call void @llvm.assume(i1 %p) |
| 36 | %fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 4 |
| 37 | %fptr = load i8*, i8** %fptrptr |
| 38 | %fptr_casted = bitcast i8* %fptr to void (i8*)* |
| 39 | ; CHECK: call void % |
| 40 | call void %fptr_casted(i8* %obj) |
| 41 | ret void |
| 42 | } |
| 43 | |
| 44 | ; CHECK: define void @call_unaligned |
| 45 | define void @call_unaligned(i8* %obj) { |
| 46 | %vtableptr = bitcast i8* %obj to [1 x i8*]** |
| 47 | %vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr |
| 48 | %vtablei8 = bitcast [1 x i8*]* %vtable to i8* |
| 49 | %p = call i1 @llvm.type.test(i8* %vtablei8, metadata !"typeid") |
| 50 | call void @llvm.assume(i1 %p) |
| 51 | %fptrptr = getelementptr i8, i8* %vtablei8, i32 1 |
| 52 | %fptrptr_casted = bitcast i8* %fptrptr to i8** |
| 53 | %fptr = load i8*, i8** %fptrptr_casted |
| 54 | %fptr_casted = bitcast i8* %fptr to void (i8*)* |
| 55 | ; CHECK: call void % |
| 56 | call void %fptr_casted(i8* %obj) |
| 57 | ret void |
| 58 | } |
| 59 | |
| 60 | declare i1 @llvm.type.test(i8*, metadata) |
| 61 | declare void @llvm.assume(i1) |
| 62 | |
| 63 | !0 = !{i32 0, !"typeid"} |