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*)], !type !0 7 @vt2 = constant [1 x i8*] [i8* bitcast (i32 (i8*)* @vf2 to i8*)], !type !0 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.type.test(i8* %vtablei8, metadata !"typeid") 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.type.test(i8*, metadata) 34 declare void @llvm.assume(i1) 35 36 !0 = !{i32 0, !"typeid"} 37
