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c96a29c643
Summary: Disable the always importing of constants introduced in D70404 by default under a new internal option, since it is causing order of magnitude compile time regressions during the thin link. Will continue investigating why the regressions occur. Reviewers: evgeny777, wmi Subscribers: mehdi_amini, inglorion, hiraditya, steven_wu, dexonsmith, arphaman, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D73724
49 lines
2.1 KiB
LLVM
49 lines
2.1 KiB
LLVM
; Check that we promote constant object in the source module and import it
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; even when it is referenced in some other GV initializer and/or is used
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; by store instructions.
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; RUN: opt -thinlto-bc %s -o %t1.bc
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; RUN: opt -thinlto-bc %p/Inputs/import-constant.ll -o %t2.bc
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; RUN: llvm-lto2 run -save-temps %t1.bc %t2.bc -o %t-out \
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; RUN: -import-constants-with-refs \
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; RUN: -r=%t1.bc,main,plx \
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; RUN: -r=%t1.bc,_Z6getObjv,l \
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; RUN: -r=%t2.bc,_Z6getObjv,pl \
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; RUN: -r=%t2.bc,val,pl \
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; RUN: -r=%t2.bc,outer,pl
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; RUN: llvm-dis %t-out.2.1.promote.bc -o - | FileCheck %s --check-prefix=PROMOTE
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; RUN: llvm-dis %t-out.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT
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; RUN: llvm-dis %t-out.1.4.opt.bc -o - | FileCheck %s --check-prefix=OPT
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; Check that variable has been promoted in the source module
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; PROMOTE: @_ZL3Obj.llvm.{{.*}} = hidden constant %struct.S { i32 4, i32 8, i32* @val }
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; @outer is a write-only variable, so it's been converted to zeroinitializer.
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; IMPORT: @outer = internal local_unnamed_addr global %struct.Q zeroinitializer
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; IMPORT-NEXT: @_ZL3Obj.llvm.{{.*}} = available_externally hidden constant %struct.S { i32 4, i32 8, i32* @val }
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; IMPORT-NEXT: @val = external dso_local global i32
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; OPT: @outer = internal unnamed_addr global %struct.Q zeroinitializer
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; OPT: define dso_local i32 @main()
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; OPT-NEXT: entry:
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; OPT-NEXT: store %struct.S* null, %struct.S** getelementptr inbounds (%struct.Q, %struct.Q* @outer, i64 0, i32 0)
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; OPT-NEXT: ret i32 12
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.S = type { i32, i32, i32* }
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define dso_local i32 @main() local_unnamed_addr {
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entry:
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%call = tail call %struct.S* @_Z6getObjv()
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%d = getelementptr inbounds %struct.S, %struct.S* %call, i64 0, i32 0
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%0 = load i32, i32* %d, align 8
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%v = getelementptr inbounds %struct.S, %struct.S* %call, i64 0, i32 1
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%1 = load i32, i32* %v, align 4
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%add = add nsw i32 %1, %0
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ret i32 %add
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}
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declare dso_local %struct.S* @_Z6getObjv() local_unnamed_addr
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