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[sancov] save entry block from pruning (it is always full dominator) 

llvm-svn: 265168
This commit is contained in:
Mike Aizatsky 2016-04-01 18:13:19 +00:00
parent d3e3d48cb9
commit 01c0f8d8a3
2 changed files with 5 additions and 6 deletions
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6
llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
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@ -342,9 +342,9 @@ static bool isFullPostDominator(const BasicBlock *BB,
return true;
}
static bool shouldInstrumentBlock(const BasicBlock *BB, const DominatorTree *DT,
static bool shouldInstrumentBlock(const Function& F, const BasicBlock *BB, const DominatorTree *DT,
const PostDominatorTree *PDT) {
if (!ClPruneBlocks)
if (!ClPruneBlocks || &F.getEntryBlock() == BB)
return true;
return !(isFullDominator(BB, DT) || isFullPostDominator(BB, PDT));
@ -374,7 +374,7 @@ bool SanitizerCoverageModule::runOnFunction(Function &F) {
&getAnalysis<PostDominatorTreeWrapperPass>(F).getPostDomTree();
for (auto &BB : F) {
if (shouldInstrumentBlock(&BB, DT, PDT))
if (shouldInstrumentBlock(F, &BB, DT, PDT))
BlocksToInstrument.push_back(&BB);
for (auto &Inst : BB) {
if (Options.IndirectCalls) {

5
llvm/test/Instrumentation/SanitizerCoverage/coverage.ll
View File

@ -13,7 +13,7 @@
; RUN: -S | FileCheck %s --check-prefix=CHECK2
; RUN: opt < %s -sancov -sanitizer-coverage-level=2 -sanitizer-coverage-block-threshold=1 \
; RUN: -S | FileCheck %s --check-prefix=CHECK_WITH_CHECK
; RUN: opt < %s -sancov -sanitizer-coverage-level=2 -sanitizer-coverage-prune-blocks=1 -S | FileCheck %s --check-prefix=CHECKPRUNE
; RUN: opt < %s -sancov -sanitizer-coverage-level=3 -sanitizer-coverage-prune-blocks=1 -S | FileCheck %s --check-prefix=CHECKPRUNE
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-unknown-linux-gnu"
@ -138,8 +138,7 @@ entry:
; CHECKPRUNE-LABEL: define void @foo
; CHECKPRUNE: call void @__sanitizer_cov
; CHECKPRUNE: call void asm sideeffect "", ""()
; CHECKPRUNE: call void @__sanitizer_cov
; CHECKPRUNE: call void asm sideeffect "", ""()
; CHECKPRUNE: call void @__sanitizer_cov
; CHECKPRUNE-NOT: call void @__sanitizer_cov
; CHECKPRUNE: ret void