forked from OSchip/llvm-project
40 lines
1.2 KiB
LLVM
40 lines
1.2 KiB
LLVM
; RUN: opt -S -wholeprogramdevirt %s | FileCheck %s
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target datalayout = "e-p:64:64"
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target triple = "x86_64-unknown-linux-gnu"
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@vt1 = global [1 x i8*] [i8* bitcast (i32 (i8*)* @vf1 to i8*)]
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@vt2 = global [1 x i8*] [i8* bitcast (i32 (i8*)* @vf2 to i8*)]
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define i32 @vf1(i8* %this) readnone {
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%this_int = ptrtoint i8* %this to i32
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ret i32 %this_int
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}
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define i32 @vf2(i8* %this) readnone {
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%this_int = ptrtoint i8* %this to i32
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ret i32 %this_int
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}
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; CHECK: define i32 @call
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define i32 @call(i8* %obj) {
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%vtableptr = bitcast i8* %obj to [1 x i8*]**
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%vtable = load [1 x i8*]*, [1 x i8*]** %vtableptr
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%vtablei8 = bitcast [1 x i8*]* %vtable to i8*
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%p = call i1 @llvm.bitset.test(i8* %vtablei8, metadata !"bitset")
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call void @llvm.assume(i1 %p)
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%fptrptr = getelementptr [1 x i8*], [1 x i8*]* %vtable, i32 0, i32 0
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%fptr = load i8*, i8** %fptrptr
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%fptr_casted = bitcast i8* %fptr to i32 (i8*)*
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; CHECK: call i32 %
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%result = call i32 %fptr_casted(i8* %obj)
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ret i32 %result
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}
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declare i1 @llvm.bitset.test(i8*, metadata)
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declare void @llvm.assume(i1)
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!0 = !{!"bitset", [1 x i8*]* @vt1, i32 0}
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!1 = !{!"bitset", [1 x i8*]* @vt2, i32 0}
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!llvm.bitsets = !{!0}
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