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ThinLTO: Make aliases explicit in the summary

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To be able to work accurately on the reference graph when taking
decision about internalizing, promoting, renaming, etc. We need
to have the alias information explicit.

Differential Revision: http://reviews.llvm.org/D18836

From: Mehdi Amini <mehdi.amini@apple.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266517 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mehdi Amini
2016-04-16 06:56:44 +00:00
parent b677706043
commit eb79e6e85d
11 changed files with 276 additions and 46 deletions
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45
test/Bitcode/thinlto-alias.ll Normal file
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; Test to check the callgraph in summary
; RUN: opt -module-summary %s -o %t.o
; RUN: llvm-bcanalyzer -dump %t.o | FileCheck %s
; RUN: opt -module-summary %p/Inputs/thinlto-alias.ll -o %t2.o
; RUN: llvm-lto -thinlto -o %t3 %t.o %t2.o
; RUN: llvm-bcanalyzer -dump %t3.thinlto.bc | FileCheck %s --check-prefix=COMBINED
; CHECK: <GLOBALVAL_SUMMARY_BLOCK
; See if the call to func is registered, using the expected callsite count
; and value id matching the subsequent value symbol table.
; CHECK-NEXT: <PERMODULE {{.*}} op4=[[FUNCID:[0-9]+]] op5=1/>
; CHECK-NEXT: </GLOBALVAL_SUMMARY_BLOCK>
; CHECK-NEXT: <VALUE_SYMTAB
; CHECK-NEXT: <FNENTRY {{.*}} record string = 'main'
; External function analias should have entry with value id FUNCID
; CHECK-NEXT: <ENTRY {{.*}} op0=[[FUNCID]] {{.*}} record string = 'analias'
; CHECK-NEXT: </VALUE_SYMTAB>
; COMBINED: <GLOBALVAL_SUMMARY_BLOCK
; See if the call to analias is registered, using the expected callsite count
; and value id matching the subsequent value symbol table.
; COMBINED-NEXT: <COMBINED {{.*}} op4=[[ALIASID:[0-9]+]] op5=1/>
; Followed by the alias and aliasee
; COMBINED-NEXT: <COMBINED {{.*}}
; COMBINED-NEXT: <COMBINED_ALIAS {{.*}} op2=[[ALIASEEOFFSET:[0-9]+]]
; COMBINED-NEXT: </GLOBALVAL_SUMMARY_BLOCK
; COMBINED-NEXT: <VALUE_SYMTAB
; Entry for function func should have entry with value id ALIASID
; COMBINED-NEXT: <COMBINED_GVDEFENTRY {{.*}} op0=[[ALIASID]] {{.*}} op2=-5751648690987223394/>
; COMBINED-NEXT: <COMBINED_GVDEFENTRY
; COMBINED-NEXT: <COMBINED_GVDEFENTRY {{.*}} op1=[[ALIASEEOFFSET]] op2=-1039159065113703048/>
; COMBINED-NEXT: </VALUE_SYMTAB>
; ModuleID = 'thinlto-function-summary-callgraph.ll'
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; Function Attrs: nounwind uwtable
define i32 @main() {
entry:
call void (...) @analias()
ret i32 0
}
declare void @analias(...)