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[NewPM] Add CrossDSOCFI pass irrespective of LTO optimization level

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This pass is not an optimization and is needed for CFI functionality
(cross-dso verification).

Differential Revision: https://reviews.llvm.org/D106699
This commit is contained in:
Pirama Arumuga Nainar 2021-07-23 12:16:22 -07:00
parent 2a84a8fcc2
commit 987b8f791e
3 changed files with 6 additions and 5 deletions
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8
lib/Passes/PassBuilder.cpp
View File

@ -1647,6 +1647,10 @@ PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level,
// Convert @llvm.global.annotations to !annotation metadata.
MPM.addPass(Annotation2MetadataPass());
// Create a function that performs CFI checks for cross-DSO calls with targets
// in the current module.
MPM.addPass(CrossDSOCFIPass());
if (Level == OptimizationLevel::O0) {
// The WPD and LowerTypeTest passes need to run at -O0 to lower type
// metadata and intrinsics.
@ -1865,10 +1869,6 @@ PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level,
MainFPM.addPass(JumpThreadingPass(/*InsertFreezeWhenUnfoldingSelect*/ true));
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(MainFPM)));
// Create a function that performs CFI checks for cross-DSO calls with
// targets in the current module.
MPM.addPass(CrossDSOCFIPass());
// Lower type metadata and the type.test intrinsic. This pass supports
// clang's control flow integrity mechanisms (-fsanitize=cfi*) and needs
// to be run at link time if CFI is enabled. This pass does nothing if

1
test/Other/new-pm-O0-defaults.ll
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@ -53,6 +53,7 @@
; CHECK-THINLTO-NEXT: Running pass: EliminateAvailableExternallyPass
; CHECK-THINLTO-NEXT: Running pass: GlobalDCEPass
; CHECK-LTO: Running pass: Annotation2MetadataPass
; CHECK-LTO-NEXT: Running pass: CrossDSOCFIPass on [module]
; CHECK-LTO-NEXT: Running pass: WholeProgramDevirtPass
; CHECK-LTO-NEXT: Running analysis: InnerAnalysisManagerProxy
; CHECK-LTO-NEXT: Running pass: LowerTypeTestsPass

2
test/Other/new-pm-lto-defaults.ll
View File

@ -26,6 +26,7 @@
; RUN: --check-prefix=CHECK-O3 --check-prefix=CHECK-EP-Peephole
; CHECK-O: Running pass: Annotation2Metadata
; CHECK-O-NEXT: Running pass: CrossDSOCFIPass
; CHECK-O-NEXT: Running pass: GlobalDCEPass
; CHECK-O-NEXT: Running pass: ForceFunctionAttrsPass
; CHECK-O-NEXT: Running pass: InferFunctionAttrsPass
@ -123,7 +124,6 @@
; CHECK-O23SZ-NEXT: Running pass: InstCombinePass on foo
; CHECK-EP-Peephole-NEXT: Running pass: NoOpFunctionPass on foo
; CHECK-O23SZ-NEXT: Running pass: JumpThreadingPass on foo
; CHECK-O23SZ-NEXT: Running pass: CrossDSOCFIPass
; CHECK-O23SZ-NEXT: Running pass: LowerTypeTestsPass
; CHECK-O-NEXT: Running pass: LowerTypeTestsPass
; CHECK-O23SZ-NEXT: Running pass: SimplifyCFGPass