https://github.com/bolshakov-a created https://github.com/llvm/llvm-project/pull/88881
`ArrayInitLoopExpr` AST node has two occurences of its as-written initializing expression in its subexpressions through a non-unique `OpaqueValueExpr`. It causes double-visiting of the initializing expression if not handled explicitly, as discussed in #85837. @efriedma-quic >From a025b2a45c2a66595c111262dd43c0890f0d54b6 Mon Sep 17 00:00:00 2001 From: Bolshakov <bolsh.and...@yandex.ru> Date: Tue, 16 Apr 2024 14:21:40 +0300 Subject: [PATCH] [Coverage] Handle array decomposition correctly `ArrayInitLoopExpr` AST node has two occurences of its as-written initializing expression in its subexpressions through a non-unique `OpaqueValueExpr`. It causes double-visiting of the initializing expression if not handled explicitly, as discussed in #85837. --- clang/lib/CodeGen/CoverageMappingGen.cpp | 4 ++++ clang/test/CoverageMapping/decomposition.cpp | 15 +++++++++++++++ 2 files changed, 19 insertions(+) create mode 100644 clang/test/CoverageMapping/decomposition.cpp diff --git a/clang/lib/CodeGen/CoverageMappingGen.cpp b/clang/lib/CodeGen/CoverageMappingGen.cpp index 71215da362d3d0..569fd489dc8baa 100644 --- a/clang/lib/CodeGen/CoverageMappingGen.cpp +++ b/clang/lib/CodeGen/CoverageMappingGen.cpp @@ -2171,6 +2171,10 @@ struct CounterCoverageMappingBuilder // propagate counts into them. } + void VisitArrayInitLoopExpr(const ArrayInitLoopExpr *AILE) { + Visit(AILE->getCommonExpr()->getSourceExpr()); + } + void VisitPseudoObjectExpr(const PseudoObjectExpr *POE) { // Just visit syntatic expression as this is what users actually write. VisitStmt(POE->getSyntacticForm()); diff --git a/clang/test/CoverageMapping/decomposition.cpp b/clang/test/CoverageMapping/decomposition.cpp new file mode 100644 index 00000000000000..31bd6cae2c4dec --- /dev/null +++ b/clang/test/CoverageMapping/decomposition.cpp @@ -0,0 +1,15 @@ +// RUN: %clang_cc1 -mllvm -emptyline-comment-coverage=false -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -emit-llvm-only %s | FileCheck %s + +// CHECK-LABEL: _Z19array_decompositioni: +// CHECK-NEXT: File 0, [[@LINE+6]]:32 -> {{[0-9]+}}:2 = #0 +// CHECK-NEXT: File 0, [[@LINE+8]]:20 -> [[@LINE+8]]:25 = #0 +// CHECK-NEXT: Branch,File 0, [[@LINE+7]]:20 -> [[@LINE+7]]:25 = #1, (#0 - #1) +// CHECK-NEXT: Gap,File 0, [[@LINE+6]]:27 -> [[@LINE+6]]:28 = #1 +// CHECK-NEXT: File 0, [[@LINE+5]]:28 -> [[@LINE+5]]:29 = #1 +// CHECK-NEXT: File 0, [[@LINE+4]]:32 -> [[@LINE+4]]:33 = (#0 - #1) +int array_decomposition(int i) { + int a[] = {1, 2, 3}; + int b[] = {4, 5, 6}; + auto [x, y, z] = i > 0 ? a : b; + return x + y + z; +} _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits