[PATCH] D92060: [lld] Add --no-lto-whole-program-visibility

Teresa Johnson via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Tue Nov 24 14:56:27 PST 2020

tejohnson created this revision.
tejohnson added a reviewer: MaskRay.
Herald added subscribers: dang, steven_wu, hiraditya, arichardson, inglorion, emaste.
Herald added a reviewer: espindola.
Herald added a project: LLVM.
tejohnson requested review of this revision.

Enables overriding earlier --lto-whole-program-visibility.

Variant of D91583 <https://reviews.llvm.org/D91583> while discussing alternate ways to identify and
handle the --export-dynamic case.

  rG LLVM Github Monorepo



Index: lld/test/ELF/lto/devirt_vcall_vis_public.ll
--- lld/test/ELF/lto/devirt_vcall_vis_public.ll
+++ lld/test/ELF/lto/devirt_vcall_vis_public.ll
@@ -31,6 +31,14 @@
 ; RUN: ld.lld %t2.o -o %t3 -save-temps \
 ; RUN: 	 -mllvm -pass-remarks=. --export-dynamic 2>&1 | FileCheck %s --implicit-check-not single-impl --allow-empty
 ; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR
+; Try again with explicit --no-lto-whole-program-visibility.
+; RUN: ld.lld %t2.o -o %t3 -save-temps --no-lto-whole-program-visibility \
+; RUN: 	 -mllvm -pass-remarks=. --export-dynamic 2>&1 | FileCheck %s --implicit-check-not single-impl --allow-empty
+; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR
+; Ensure --no-lto-whole-program-visibility overrides explicit --lto-whole-program-visibility.
+; RUN: ld.lld %t2.o -o %t3 -save-temps --lto-whole-program-visibility --no-lto-whole-program-visibility \
+; RUN: 	 -mllvm -pass-remarks=. --export-dynamic 2>&1 | FileCheck %s --implicit-check-not single-impl --allow-empty
+; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck %s --check-prefix=CHECK-NODEVIRT-IR
 ; Hybrid WPD
 ; RUN: ld.lld %t.o -o %t3 -save-temps \
Index: lld/ELF/Options.td
--- lld/ELF/Options.td
+++ lld/ELF/Options.td
@@ -539,8 +539,9 @@
 def lto_obj_path_eq: JJ<"lto-obj-path=">;
 def lto_sample_profile: JJ<"lto-sample-profile=">,
   HelpText<"Sample profile file path">;
-def lto_whole_program_visibility: FF<"lto-whole-program-visibility">,
-  HelpText<"Asserts that the LTO link has whole program visibility">;
+defm lto_whole_program_visibility: BB<"lto-whole-program-visibility",
+  "Asserts that the LTO link has whole program visibility",
+  "Asserts that the LTO link does not have whole program visibility">;
 def disable_verify: F<"disable-verify">;
 defm mllvm: Eq<"mllvm", "Additional arguments to forward to LLVM's option processing">;
 def opt_remarks_filename: Separate<["--"], "opt-remarks-filename">,
Index: lld/ELF/Driver.cpp
--- lld/ELF/Driver.cpp
+++ lld/ELF/Driver.cpp
@@ -990,7 +990,8 @@
   config->ltoNewPassManager = args.hasArg(OPT_lto_new_pass_manager);
   config->ltoNewPmPasses = args.getLastArgValue(OPT_lto_newpm_passes);
   config->ltoWholeProgramVisibility =
-      args.hasArg(OPT_lto_whole_program_visibility);
+      args.hasFlag(OPT_lto_whole_program_visibility,
+                   OPT_no_lto_whole_program_visibility, false);
   config->ltoo = args::getInteger(args, OPT_lto_O, 2);
   config->ltoObjPath = args.getLastArgValue(OPT_lto_obj_path_eq);
   config->ltoPartitions = args::getInteger(args, OPT_lto_partitions, 1);

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