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llvm-project/llvm/test/ThinLTO/X86/empty-module.ll

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[LTO] Make processing of combined module more consistent Summary: 1. Use stream 0 only for combined module. Previously if combined module was not processes ThinLTO used the stream for own output. However small changes in input, could trigger combined module and shuffle outputs making life of llvm::LTO harder. 2. Always process combined module and write output to stream 0. Processing empty combined module is cheap and allows llvm::LTO users to avoid implementing processing which is already done in llvm::LTO. Subscribers: mehdi_amini, inglorion, eraman, hiraditya Differential Revision: https://reviews.llvm.org/D41267 llvm-svn: 320905
2017-12-16 10:10:00 +08:00
; RUN: opt -module-summary -o %t.bc %s
[LTO] Suppress emission of empty combined module by default Summary: That unless the user requested an output object (--lto-obj-path), the an unused empty combined module is not emitted. This changed is helpful for some target (ex. RISCV-V) which encoded the ABI info in IR module flags (target-abi). Empty unused module has no ABI info so the linker would get the linking error during merging incompatible ABIs. Reviewers: tejohnson, espindola, MaskRay Subscribers: emaste, inglorion, arichardson, hiraditya, simoncook, MaskRay, steven_wu, dexonsmith, PkmX, dang, lenary, s.egerton, luismarques, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D78988
2020-04-28 11:04:36 +08:00
; RUN: rm -f %t2.*
; RUN: llvm-lto2 run %t.bc -r %t.bc,foo,pl -o %t2 -thinlto-distributed-indexes -save-temps
; Ensure lto does not emit empty combined module.
; RUN: test ! -e %t2.0
; Ensure empty combined module has only 2 temp files.
; RUN: ls %t2.0.*.bc | count 2
[LTO] Make processing of combined module more consistent Summary: 1. Use stream 0 only for combined module. Previously if combined module was not processes ThinLTO used the stream for own output. However small changes in input, could trigger combined module and shuffle outputs making life of llvm::LTO harder. 2. Always process combined module and write output to stream 0. Processing empty combined module is cheap and allows llvm::LTO users to avoid implementing processing which is already done in llvm::LTO. Subscribers: mehdi_amini, inglorion, eraman, hiraditya Differential Revision: https://reviews.llvm.org/D41267 llvm-svn: 320905
2017-12-16 10:10:00 +08:00
Reland "Change the X86 datalayout to add three address spaces for 32 bit signed, 32 bit unsigned, and 64 bit pointers." This reverts 57076d3199fc2b0af4a3736b7749dd5462cacda5. Original review at https://reviews.llvm.org/D64931. Review for added fix at https://reviews.llvm.org/D66843. llvm-svn: 371568
2019-09-11 07:15:38 +08:00
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
[LTO] Make processing of combined module more consistent Summary: 1. Use stream 0 only for combined module. Previously if combined module was not processes ThinLTO used the stream for own output. However small changes in input, could trigger combined module and shuffle outputs making life of llvm::LTO harder. 2. Always process combined module and write output to stream 0. Processing empty combined module is cheap and allows llvm::LTO users to avoid implementing processing which is already done in llvm::LTO. Subscribers: mehdi_amini, inglorion, eraman, hiraditya Differential Revision: https://reviews.llvm.org/D41267 llvm-svn: 320905
2017-12-16 10:10:00 +08:00
target triple = "x86_64-unknown-linux-gnu"
@foo = ifunc i32 (i32), i64 ()* @foo_ifunc
define internal i64 @foo_ifunc() {
entry:
ret i64 0
}