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Author SHA1 Message Date
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
Fangrui Song 81cebfd008 [ELF][test] Change -o %t to -o /dev/null if the output is not needed 2020-02-12 21:54:50 -08:00
Bob Haarman 9f0f36e022 [ELF] accept thinlto options without --plugin-opt= prefix 
Summary:
When support for ThinLTO was first added to lld, the options that
control it were prefixed with --plugin-opt= for compatibility with
an existing implementation as a linker plugin. This change enables
shorter versions of the options to be used, as follows:

  New                              Existing
  -thinlto-emit-imports-files      --plugin-opt=thinlto-emit-imports-files
  -thinlto-index-only              --plugin-opt=thinlto-index-only
  -thinlto-index-only=             --plugin-opt=thinlto-index-only=
  -thinlto-object-suffix-replace=  --plugin-opt=thinlto-object-suffix-replace=
  -thinlto-prefix-replace=         --plugin-opt=thinlto-prefix-replace=
  -lto-obj-path=                   --plugin-opt=obj-path=

The options with the --plugin-opt= prefix have been retained as aliases
for the shorter variants so that they continue to be accepted.

Reviewers: tejohnson, ruiu, espindola

Reviewed By: ruiu

Subscribers: emaste, arichardson, MaskRay, steven_wu, dexonsmith, arphaman, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67782

llvm-svn: 372798
 2019-09-25 01:19:48 +00:00
Amy Huang 7b1d793713 Reland "Change the X86 datalayout to add three address spaces 
for 32 bit signed, 32 bit unsigned, and 64 bit pointers."
This reverts 57076d3199.

Original review at https://reviews.llvm.org/D64931.
Review for added fix at https://reviews.llvm.org/D66843.

llvm-svn: 371568
 2019-09-10 23:15:38 +00:00
Vlad Tsyrklevich 57076d3199 Revert "Change the X86 datalayout to add three address spaces for 32 bit signed," 
This reverts commit r370083 because it caused check-lld failures on
sanitizer-x86_64-linux-fast.

llvm-svn: 370142
 2019-08-28 01:08:54 +00:00
Amy Huang 1299945b81 Change the X86 datalayout to add three address spaces for 32 bit signed, 
32 bit unsigned, and 64 bit pointers.

llvm-svn: 370083
 2019-08-27 17:46:53 +00:00
Rui Ueyama 0dd56dcdd4 Handle --plugin-opt= options as alias options. 
Previously, we had a loop to iterate over options starting with
`--plugin-opt=` and parse them by hand. But we can make OptTable
do that job for us.

Differential Revision: https://reviews.llvm.org/D47167

llvm-svn: 332935
 2018-05-22 02:53:11 +00:00
Rumeet Dhindsa 304d0d5560 Splitting thinlto.ll test file and renaming other test files. 
Differential Revision: https://reviews.llvm.org/D46731

llvm-svn: 332128
 2018-05-11 19:37:08 +00:00