| Peter Collingbourne | df49d1b | 2016-02-09 22:50:34 +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 | @vt1 = constant [1 x i8*] [i8* bitcast (i32 (i8*)* @vf1 to i8*)] |
| 7 | @vt2 = constant [1 x i8*] [i8* bitcast (i32 (i8*)* @vf2 to i8*)] |
| 8 | |
| 9 | define i32 @vf1(i8* %this) readnone { |
| 10 | ret i32 123 |
| 11 | } |
| 12 | |
| 13 | define i32 @vf2(i8* %this) readnone { |
| 14 | ret i32 123 |
| 15 | } |
| 16 | |
| 17 | ; CHECK: define i32 @call |
| 18 | define i32 @call(i8* %obj) { |
| 19 | %vtableptr = bitcast i8* %obj to [1 x i8*]** |
| 20 | %vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr |
| 21 | %vtablei8 = bitcast [1 x i8*]* %vtable to i8* |
| 22 | %p = call i1 @llvm.bitset.test(i8* %vtablei8, metadata !"bitset") |
| 23 | call void @llvm.assume(i1 %p) |
| 24 | %fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 0 |
| 25 | %fptr = load i8*, i8** %fptrptr |
| 26 | %fptr_casted = bitcast i8* %fptr to i32 (i8*)* |
| 27 | %result = call i32 %fptr_casted(i8* %obj) |
| 28 | ; CHECK-NOT: call |
| 29 | ; CHECK: ret i32 123 |
| 30 | ret i32 %result |
| 31 | } |
| 32 | |
| 33 | declare i1 @llvm.bitset.test(i8*, metadata) |
| 34 | declare void @llvm.assume(i1) |
| 35 | |
| 36 | !0 = !{!"bitset", [1 x i8*]* @vt1, i32 0} |
| 37 | !1 = !{!"bitset", [1 x i8*]* @vt2, i32 0} |
| 38 | !llvm.bitsets = !{!0, !1} |