Files
clang-p2996/lld/test/ELF/lto/thinlto-prefix-replace.ll
Fangrui Song e20a215992 [ELF] Add convenience TableGen classes to enforce two dashes for options not supported by GNU ld
Announced on https://lists.llvm.org/pipermail/llvm-dev/2020-May/141416.html

For many options, we have to support either one or two dash to be
compatible with GNU ld. For newer and lld specific options, we can enforce strict double dashes.

Affected options:

* --thinlto-*
* --lto-*
* --shuffle-sections=

This patch does not change `-plugin-opt=*` because clang driver passes
`-plugin-opt=*` and I don't intend to cause churn.

In 2000, GNU ld tried something similar with --omagic
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=e4897a3288f37d5f69e8acd256a6e83e607fe8d8

Reviewed By: tejohnson, psmith

Differential Revision: https://reviews.llvm.org/D79371
2020-05-08 07:37:06 -07:00

29 lines
1.5 KiB
LLVM

; REQUIRES: x86
; Check that changing the output path via thinlto-prefix-replace works
; RUN: mkdir -p %t/oldpath
; RUN: opt -module-summary %s -o %t/oldpath/thinlto_prefix_replace.o
; Ensure that there is no existing file at the new path, so we properly
; test the creation of the new file there.
; RUN: rm -f %t/newpath/thinlto_prefix_replace.o.thinlto.bc
; RUN: ld.lld --plugin-opt=thinlto-index-only --plugin-opt=thinlto-prefix-replace="%t/oldpath/;%t/newpath/" -shared %t/oldpath/thinlto_prefix_replace.o -o %t/thinlto_prefix_replace
; RUN: ls %t/newpath/thinlto_prefix_replace.o.thinlto.bc
; Check that this also works without the --plugin-opt= prefix.
; RUN: rm -f %t/newpath/thinlto_prefix_replace.o.thinlto.bc
; RUN: ld.lld --thinlto-index-only --thinlto-prefix-replace="%t/oldpath/;%t/newpath/" -shared %t/oldpath/thinlto_prefix_replace.o -o %t/thinlto_prefix_replace
; RUN: ls %t/newpath/thinlto_prefix_replace.o.thinlto.bc
; Ensure that lld generates error if prefix replace option does not have 'old;new' format
; RUN: rm -f %t/newpath/thinlto_prefix_replace.o.thinlto.bc
; RUN: not ld.lld --plugin-opt=thinlto-index-only --plugin-opt=thinlto-prefix-replace=abc:def -shared %t/oldpath/thinlto_prefix_replace.o -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR
; ERR: --plugin-opt=thinlto-prefix-replace= expects 'old;new' format, but got abc:def
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define void @f() {
entry:
ret void
}