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28853a85a8
Summary: It's useful to have some visibility about which call sites are devirtualized, especially for debug purposes. Another use case is a regression test on the application side (like, Chromium). Reviewers: pcc Differential Revision: http://reviews.llvm.org/D22252 llvm-svn: 275145
42 lines
1.1 KiB
LLVM
42 lines
1.1 KiB
LLVM
; RUN: opt -S -wholeprogramdevirt -pass-remarks=wholeprogramdevirt %s 2>&1 | 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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; CHECK: remark: <unknown>:0:0: devirtualized call
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; CHECK-NOT: devirtualized call
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@vt1 = constant [1 x i8*] [i8* bitcast (void (i8*)* @vf to i8*)], !type !0
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@vt2 = constant [1 x i8*] [i8* bitcast (void (i8*)* @vf to i8*)], !type !0
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define void @vf(i8* %this) {
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ret void
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}
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; CHECK: define void @call
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define void @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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%pair = call {i8*, i1} @llvm.type.checked.load(i8* %vtablei8, i32 0, metadata !"typeid")
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%fptr = extractvalue {i8*, i1} %pair, 0
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%p = extractvalue {i8*, i1} %pair, 1
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; CHECK: br i1 true,
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br i1 %p, label %cont, label %trap
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cont:
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%fptr_casted = bitcast i8* %fptr to void (i8*)*
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; CHECK: call void @vf(
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call void %fptr_casted(i8* %obj)
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ret void
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trap:
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call void @llvm.trap()
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unreachable
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}
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declare {i8*, i1} @llvm.type.checked.load(i8*, i32, metadata)
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declare void @llvm.trap()
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!0 = !{i32 0, !"typeid"}
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