llvm-mirror/test/ThinLTO/X86/export.ll
Teresa Johnson d81c3fc8d1 [ThinLTO] Thin link efficiency improvement: don't re-export globals (NFC)
Summary:
We were reinvoking exportGlobalInModule numerous times redundantly.
No need to re-export globals referenced by a global that was already
imported from its module. This resulted in a large speedup in the thin
link for a big application, particularly when importing aggressiveness
was cranked up.

Reviewers: mehdi_amini

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D27687

llvm-svn: 289896
2016-12-15 23:50:06 +00:00

27 lines
839 B
LLVM

; Do setup work for all below tests: generate bitcode and combined index
; RUN: opt -module-summary %s -o %t1.bc
; RUN: opt -module-summary %p/Inputs/export.ll -o %t2.bc
; RUN: llvm-lto -thinlto-action=thinlink -o %t3.bc %t1.bc %t2.bc
; Ensure statics are promoted/renamed correctly from this file.
; RUN: llvm-lto -thinlto-action=promote %t1.bc -thinlto-index=%t3.bc -o - | llvm-dis -o - | FileCheck %s
; CHECK-DAG: @staticvar.llvm.0 = hidden global
; CHECK-DAG: define hidden void @staticfunc.llvm.0
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.11.0"
@staticvar = internal global i32 1, align 4
define void @callstaticfunc() #0 {
entry:
call void @staticfunc()
ret void
}
define internal void @staticfunc() #0 {
entry:
%0 = load i32, i32* @staticvar, align 4
ret void
}