https://github.com/llvmbot created https://github.com/llvm/llvm-project/pull/90369
Backport c1b6cca1214e7a9c14a30b81585dd8b81baeaa77 Requested by: @whentojump >From 71dd393acd7948b8290e65d082c509fd2df4c02f Mon Sep 17 00:00:00 2001 From: Wentao Zhang <35722712+whentoj...@users.noreply.github.com> Date: Mon, 22 Apr 2024 12:37:38 -0500 Subject: [PATCH] [clang][CoverageMapping] do not emit a gap region when either end doesn't have valid source locations (#89564) Fixes #86998 (cherry picked from commit c1b6cca1214e7a9c14a30b81585dd8b81baeaa77) --- clang/lib/CodeGen/CoverageMappingGen.cpp | 11 ++++-- .../CoverageMapping/statement-expression.c | 36 +++++++++++++++++++ 2 files changed, 44 insertions(+), 3 deletions(-) create mode 100644 clang/test/CoverageMapping/statement-expression.c diff --git a/clang/lib/CodeGen/CoverageMappingGen.cpp b/clang/lib/CodeGen/CoverageMappingGen.cpp index 0c43317642bca4..ae4e6d4c88c02d 100644 --- a/clang/lib/CodeGen/CoverageMappingGen.cpp +++ b/clang/lib/CodeGen/CoverageMappingGen.cpp @@ -1207,6 +1207,12 @@ struct CounterCoverageMappingBuilder /// Find a valid gap range between \p AfterLoc and \p BeforeLoc. std::optional<SourceRange> findGapAreaBetween(SourceLocation AfterLoc, SourceLocation BeforeLoc) { + // Some statements (like AttributedStmt and ImplicitValueInitExpr) don't + // have valid source locations. Do not emit a gap region if this is the case + // in either AfterLoc end or BeforeLoc end. + if (AfterLoc.isInvalid() || BeforeLoc.isInvalid()) + return std::nullopt; + // If AfterLoc is in function-like macro, use the right parenthesis // location. if (AfterLoc.isMacroID()) { @@ -1370,9 +1376,8 @@ struct CounterCoverageMappingBuilder for (const Stmt *Child : S->children()) if (Child) { // If last statement contains terminate statements, add a gap area - // between the two statements. Skipping attributed statements, because - // they don't have valid start location. - if (LastStmt && HasTerminateStmt && !isa<AttributedStmt>(Child)) { + // between the two statements. + if (LastStmt && HasTerminateStmt) { auto Gap = findGapAreaBetween(getEnd(LastStmt), getStart(Child)); if (Gap) fillGapAreaWithCount(Gap->getBegin(), Gap->getEnd(), diff --git a/clang/test/CoverageMapping/statement-expression.c b/clang/test/CoverageMapping/statement-expression.c new file mode 100644 index 00000000000000..5f9ab5838af342 --- /dev/null +++ b/clang/test/CoverageMapping/statement-expression.c @@ -0,0 +1,36 @@ +// RUN: %clang_cc1 -mllvm -emptyline-comment-coverage=false -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -emit-llvm-only -main-file-name statement-expression.c %s + +// No crash for the following examples, where GNU Statement Expression extension +// could introduce region terminators (break, goto etc) before implicit +// initializers in a struct or an array. +// See https://github.com/llvm/llvm-project/pull/89564 + +struct Foo { + int field1; + int field2; +}; + +void f1(void) { + struct Foo foo = { + .field1 = ({ + switch (0) { + case 0: + break; // A region terminator + } + 0; + }), + // ImplicitValueInitExpr introduced here for .field2 + }; +} + +void f2(void) { + int arr[3] = { + [0] = ({ + goto L0; // A region terminator +L0: + 0; + }), + // ImplicitValueInitExpr introduced here for subscript [1] + [2] = 0, + }; +} _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits