[PATCH] D47818: [llvm-strip] Expose --strip-unneeded option

[Paul Semel via Phabricator via llvm-commits]

paulsemel created this revision.
paulsemel added reviewers: echristo, jakehehrlich, jhenderson, alexshap.

Repository:
  rL LLVM

https://reviews.llvm.org/D47818

Files:
  test/tools/llvm-objcopy/strip-unneeded.test
  tools/llvm-objcopy/StripOpts.td
  tools/llvm-objcopy/llvm-objcopy.cpp


Index: tools/llvm-objcopy/llvm-objcopy.cpp
===================================================================
--- tools/llvm-objcopy/llvm-objcopy.cpp
+++ tools/llvm-objcopy/llvm-objcopy.cpp
@@ -585,7 +585,10 @@
 
   // Strip debug info only.
   Config.StripDebug = InputArgs.hasArg(STRIP_strip_debug);
-  if (!Config.StripDebug)
+
+  Config.StripUnneeded = InputArgs.hasArg(STRIP_strip_unneeded);
+
+  if (!Config.StripDebug && !Config.StripUnneeded)
     Config.StripAll = true;
 
   for (auto Arg : InputArgs.filtered(STRIP_remove_section))
Index: tools/llvm-objcopy/StripOpts.td
===================================================================
--- tools/llvm-objcopy/StripOpts.td
+++ tools/llvm-objcopy/StripOpts.td
@@ -36,3 +36,5 @@
 
 def K : JoinedOrSeparate<["-"], "K">,
         Alias<keep_symbol>;
+def strip_unneeded : Flag<["-", "--"], "strip-unneeded">,
+                      HelpText<"Remove all symbols not needed by relocations">;
Index: test/tools/llvm-objcopy/strip-unneeded.test
===================================================================
--- test/tools/llvm-objcopy/strip-unneeded.test
+++ test/tools/llvm-objcopy/strip-unneeded.test
@@ -1,6 +1,13 @@
 # RUN: yaml2obj %s > %t
+# RUN: cp %t %t1
 # RUN: llvm-objcopy --strip-unneeded %t %t2
+# Verify that llvm-objcopy has not modified the input.
+# RUN: cmp %t %t1
 # RUN: llvm-readobj -symbols %t2 | FileCheck %s
+# Verify that llvm-strip modifies the symbol table the same way.
+# RUN: cp %t %t3
+# RUN: llvm-strip --strip-unneeded %t3
+# RUN: cmp %t2 %t3
 
 !ELF
 FileHeader:


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