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authorNAKAMURA Takumi <geek4civic@gmail.com>2025-01-09 17:11:07 +0900
committerGitHub <noreply@github.com>2025-01-09 17:11:07 +0900
commit397ac44f623f891d8f05d6673a95984ac0a26671 (patch)
tree6a77b463f700e090df586672c26b9fe765fd115b /clang/lib/CodeGen/CodeGenFunction.cpp
parentd30a5fc5a2f88dee1198bd2285ddf1c55da51bb6 (diff)
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[Coverage] Introduce the type `CounterPair` for RegionCounterMap. NFC. (#112724)
`CounterPair` can hold `<uint32_t, uint32_t>` instead of current `unsigned`, to hold also the counter number of SkipPath. For now, this change provides the skeleton and only `CounterPair::Executed` is used. Each counter number can have `None` to suppress emitting counter increment. 2nd element `Skipped` is initialized as `None` by default, since most `Stmt*` don't have a pair of counters. This change also provides stubs for the verifier. I'll provide the impl of verifier for `+Asserts` later. `markStmtAsUsed(bool, Stmt*)` may be used to inform that other side counter may not emitted. `markStmtMaybeUsed(S)` may be used for the `Stmt` and its inner will be excluded for emission in the case of skipping by constant folding. I put it into places where I found. `verifyCounterMap()` will check the coverage map and the counter map, and can be used to report inconsistency. These verifier methods shall be eliminated in `-Asserts`. https://discourse.llvm.org/t/rfc-integrating-singlebytecoverage-with-branch-coverage/82492
Diffstat (limited to 'clang/lib/CodeGen/CodeGenFunction.cpp')
-rw-r--r--clang/lib/CodeGen/CodeGenFunction.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index af58fa6..27ec68b 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -1616,6 +1616,8 @@ void CodeGenFunction::GenerateCode(GlobalDecl GD, llvm::Function *Fn,
// Emit the standard function epilogue.
FinishFunction(BodyRange.getEnd());
+ PGO.verifyCounterMap();
+
// If we haven't marked the function nothrow through other means, do
// a quick pass now to see if we can.
if (!CurFn->doesNotThrow())
@@ -1738,6 +1740,7 @@ bool CodeGenFunction::ConstantFoldsToSimpleInteger(const Expr *Cond,
if (!AllowLabels && CodeGenFunction::ContainsLabel(Cond))
return false; // Contains a label.
+ PGO.markStmtMaybeUsed(Cond);
ResultInt = Int;
return true;
}