[llvm] ee765b0 - [NewPM] Add pass options for `InternalizePass` to preserve GVs. (#91334)

[via llvm-commits]

Author: Tim Besard
Date: 2024-05-15T13:17:29-07:00
New Revision: ee765b0c94df7e636d9739216b1646d3a2d3b5db

URL: https://github.com/llvm/llvm-project/commit/ee765b0c94df7e636d9739216b1646d3a2d3b5db
DIFF: https://github.com/llvm/llvm-project/commit/ee765b0c94df7e636d9739216b1646d3a2d3b5db.diff

LOG: [NewPM] Add pass options for `InternalizePass` to preserve GVs. (#91334)

This PR adds a string interface to `InternalizePass`' `MustPreserveGV`
option, which is a callback function to indicate if a GV is not to be
internalized. This is for use in LLVM.jl, the Julia wrapper for LLVM,
which uses the C API and is thus required to use the PassBuilder string
API for building NewPM pipelines.

Added: 
    

Modified: 
    llvm/lib/Passes/PassBuilder.cpp
    llvm/lib/Passes/PassRegistry.def
    llvm/test/Transforms/Internalize/lists.ll

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Passes/PassBuilder.cpp b/llvm/lib/Passes/PassBuilder.cpp
index e4131706aba01..91c5b65c03511 100644
--- a/llvm/lib/Passes/PassBuilder.cpp
+++ b/llvm/lib/Passes/PassBuilder.cpp
@@ -1142,6 +1142,24 @@ Expected<GlobalMergeOptions> parseGlobalMergeOptions(StringRef Params) {
   return Result;
 }
 
+Expected<SmallVector<std::string, 0>> parseInternalizeGVs(StringRef Params) {
+  SmallVector<std::string, 1> PreservedGVs;
+  while (!Params.empty()) {
+    StringRef ParamName;
+    std::tie(ParamName, Params) = Params.split(';');
+
+    if (ParamName.consume_front("preserve-gv=")) {
+      PreservedGVs.push_back(ParamName.str());
+    } else {
+      return make_error<StringError>(
+          formatv("invalid Internalize pass parameter '{0}' ", ParamName).str(),
+          inconvertibleErrorCode());
+    }
+  }
+
+  return PreservedGVs;
+}
+
 } // namespace
 
 /// Tests whether a pass name starts with a valid prefix for a default pipeline

diff  --git a/llvm/lib/Passes/PassRegistry.def b/llvm/lib/Passes/PassRegistry.def
index e5ce6cb7da649..50682ca4970f1 100644
--- a/llvm/lib/Passes/PassRegistry.def
+++ b/llvm/lib/Passes/PassRegistry.def
@@ -78,7 +78,6 @@ MODULE_PASS("insert-gcov-profiling", GCOVProfilerPass())
 MODULE_PASS("instrorderfile", InstrOrderFilePass())
 MODULE_PASS("instrprof", InstrProfilingLoweringPass())
 MODULE_PASS("ctx-instr-lower", PGOCtxProfLoweringPass())
-MODULE_PASS("internalize", InternalizePass())
 MODULE_PASS("invalidate<all>", InvalidateAllAnalysesPass())
 MODULE_PASS("iroutliner", IROutlinerPass())
 MODULE_PASS("jmc-instrumenter", JMCInstrumenterPass())
@@ -175,6 +174,20 @@ MODULE_PASS_WITH_PARAMS(
     "hwasan", "HWAddressSanitizerPass",
     [](HWAddressSanitizerOptions Opts) { return HWAddressSanitizerPass(Opts); },
     parseHWASanPassOptions, "kernel;recover")
+MODULE_PASS_WITH_PARAMS(
+    "internalize", "InternalizePass",
+    [](SmallVector<std::string, 0> PreservedGVs) {
+      if (PreservedGVs.empty())
+        return InternalizePass();
+      auto MustPreserveGV = [=](const GlobalValue &GV) {
+        for (auto &PreservedGV : PreservedGVs)
+          if (GV.getName() == PreservedGV)
+            return true;
+        return false;
+      };
+      return InternalizePass(MustPreserveGV);
+    },
+    parseInternalizeGVs, "preserve-gv=GV")
 MODULE_PASS_WITH_PARAMS(
     "ipsccp", "IPSCCPPass", [](IPSCCPOptions Opts) { return IPSCCPPass(Opts); },
     parseIPSCCPOptions, "no-func-spec;func-spec")

diff  --git a/llvm/test/Transforms/Internalize/lists.ll b/llvm/test/Transforms/Internalize/lists.ll
index df408f906b780..83dad03d75eae 100644
--- a/llvm/test/Transforms/Internalize/lists.ll
+++ b/llvm/test/Transforms/Internalize/lists.ll
@@ -13,6 +13,11 @@
 ; -file and -list options should be merged, the apifile contains foo and j
 ; RUN: opt < %s -passes=internalize -internalize-public-api-list bar -internalize-public-api-file %S/apifile -S | FileCheck --check-prefix=FOO_J_AND_BAR %s
 
+; specifying through pass builder option
+; RUN: opt < %s -passes='internalize<preserve-gv=foo;preserve-gv=j>' -S | FileCheck --check-prefix=FOO_AND_J %s
+; RUN: opt < %s -passes='internalize<preserve-gv=foo;preserve-gv=bar>' -S | FileCheck --check-prefix=FOO_AND_BAR %s
+; RUN: opt < %s -passes='internalize<preserve-gv=foo;preserve-gv=j;preserve-gv=bar>' -S | FileCheck --check-prefix=FOO_J_AND_BAR %s
+
 ; ALL: @i = internal global
 ; FOO_AND_J: @i = internal global
 ; FOO_AND_BAR: @i = internal global