[clang] 9efce0b - [clang] Run LLVM Verifier in modes without CodeGen too
Itay Bookstein via cfe-commits
cfe-commits at lists.llvm.org
Tue Nov 9 13:57:20 PST 2021
Author: Itay Bookstein
Date: 2021-11-09T23:57:13+02:00
New Revision: 9efce0baee4bdda9d824716668ac3d3027bfa318
URL: https://github.com/llvm/llvm-project/commit/9efce0baee4bdda9d824716668ac3d3027bfa318
DIFF: https://github.com/llvm/llvm-project/commit/9efce0baee4bdda9d824716668ac3d3027bfa318.diff
LOG: [clang] Run LLVM Verifier in modes without CodeGen too
Previously, the Backend_Emit{Nothing,BC,LL} modes did
not run the LLVM verifier since it is usually added via
the TargetMachine::addPassesToEmitFile method according
to the DisableVerify parameter. This is called from
EmitAssemblyHelper::AddEmitPasses, which is only relevant
for BackendAction-s that require CodeGen.
Note:
* In these particular situations the verifier is added
to the optimization pipeline rather than the codegen
pipeline so that it runs prior to the BC/LL emission
pass.
* This change applies to both the old and the new PMs.
* Because the clang tests use -emit-llvm ubiquitously,
this change will enable the verifier for them.
* A small bug is fixed in emitIFuncDefinition so that
the clang/test/CodeGen/ifunc.c test would pass:
the emitIFuncDefinition incorrectly passed the
GlobalDecl of the IFunc itself to the call to
GetOrCreateLLVMFunction for creating the resolver.
Signed-off-by: Itay Bookstein <ibookstein at gmail.com>
Reviewed By: rjmccall
Differential Revision: https://reviews.llvm.org/D113352
Added:
Modified:
clang/lib/CodeGen/BackendUtil.cpp
clang/lib/CodeGen/CodeGenModule.cpp
clang/test/CodeGen/lto-newpm-pipeline.c
Removed:
################################################################################
diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index 2d467e8dea81..1f583e639c57 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -487,6 +487,11 @@ static CodeGenFileType getCodeGenFileType(BackendAction Action) {
}
}
+static bool actionRequiresCodeGen(BackendAction Action) {
+ return Action != Backend_EmitNothing && Action != Backend_EmitBC &&
+ Action != Backend_EmitLL;
+}
+
static bool initTargetOptions(DiagnosticsEngine &Diags,
llvm::TargetOptions &Options,
const CodeGenOptions &CodeGenOpts,
@@ -977,9 +982,7 @@ void EmitAssemblyHelper::EmitAssemblyWithLegacyPassManager(
setCommandLineOpts(CodeGenOpts);
- bool UsesCodeGen = (Action != Backend_EmitNothing &&
- Action != Backend_EmitBC &&
- Action != Backend_EmitLL);
+ bool UsesCodeGen = actionRequiresCodeGen(Action);
CreateTargetMachine(UsesCodeGen);
if (UsesCodeGen && !TM)
@@ -1006,6 +1009,12 @@ void EmitAssemblyHelper::EmitAssemblyWithLegacyPassManager(
CreatePasses(PerModulePasses, PerFunctionPasses);
+ // Add a verifier pass if requested. We don't have to do this if the action
+ // requires code generation because there will already be a verifier pass in
+ // the code-generation pipeline.
+ if (!UsesCodeGen && CodeGenOpts.VerifyModule)
+ PerModulePasses.add(createVerifierPass());
+
legacy::PassManager CodeGenPasses;
CodeGenPasses.add(
createTargetTransformInfoWrapperPass(getTargetIRAnalysis()));
@@ -1425,6 +1434,13 @@ void EmitAssemblyHelper::RunOptimizationPipeline(
MPM.addPass(ModuleMemProfilerPass());
}
}
+
+ // Add a verifier pass if requested. We don't have to do this if the action
+ // requires code generation because there will already be a verifier pass in
+ // the code-generation pipeline.
+ if (!actionRequiresCodeGen(Action) && CodeGenOpts.VerifyModule)
+ MPM.addPass(VerifierPass());
+
switch (Action) {
case Backend_EmitBC:
if (CodeGenOpts.PrepareForThinLTO && !CodeGenOpts.DisableLLVMPasses) {
@@ -1514,8 +1530,7 @@ void EmitAssemblyHelper::EmitAssembly(BackendAction Action,
TimeRegion Region(CodeGenOpts.TimePasses ? &CodeGenerationTime : nullptr);
setCommandLineOpts(CodeGenOpts);
- bool RequiresCodeGen = (Action != Backend_EmitNothing &&
- Action != Backend_EmitBC && Action != Backend_EmitLL);
+ bool RequiresCodeGen = actionRequiresCodeGen(Action);
CreateTargetMachine(RequiresCodeGen);
if (RequiresCodeGen && !TM)
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 8e4d9dc751dd..d36cff82f9dd 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -5034,7 +5034,7 @@ void CodeGenModule::emitIFuncDefinition(GlobalDecl GD) {
llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType());
llvm::Type *ResolverTy = llvm::GlobalIFunc::getResolverFunctionType(DeclTy);
llvm::Constant *Resolver =
- GetOrCreateLLVMFunction(IFA->getResolver(), ResolverTy, GD,
+ GetOrCreateLLVMFunction(IFA->getResolver(), ResolverTy, {},
/*ForVTable=*/false);
llvm::GlobalIFunc *GIF =
llvm::GlobalIFunc::create(DeclTy, 0, llvm::Function::ExternalLinkage,
diff --git a/clang/test/CodeGen/lto-newpm-pipeline.c b/clang/test/CodeGen/lto-newpm-pipeline.c
index c2cd3a4720cc..8119c79425ef 100644
--- a/clang/test/CodeGen/lto-newpm-pipeline.c
+++ b/clang/test/CodeGen/lto-newpm-pipeline.c
@@ -32,6 +32,8 @@
// CHECK-FULL-O0-NEXT: Running pass: CoroCleanupPass
// CHECK-FULL-O0-NEXT: Running pass: CanonicalizeAliasesPass
// CHECK-FULL-O0-NEXT: Running pass: NameAnonGlobalPass
+// CHECK-FULL-O0-NEXT: Running pass: VerifierPass
+// CHECK-FULL-O0-NEXT: Running analysis: VerifierAnalysis
// CHECK-FULL-O0-NEXT: Running pass: BitcodeWriterPass
// CHECK-THIN-O0: Running pass: AlwaysInlinerPass
@@ -40,6 +42,8 @@
// CHECK-THIN-O0: Running pass: CoroCleanupPass
// CHECK-THIN-O0-NEXT: Running pass: CanonicalizeAliasesPass
// CHECK-THIN-O0-NEXT: Running pass: NameAnonGlobalPass
+// CHECK-THIN-O0-NEXT: Running pass: VerifierPass
+// CHECK-THIN-O0-NEXT: Running analysis: VerifierAnalysis
// CHECK-THIN-O0-NEXT: Running pass: ThinLTOBitcodeWriterPass
// TODO: The LTO pre-link pipeline currently invokes
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