https://github.com/vgvassilev updated
https://github.com/llvm/llvm-project/pull/89804
>From 7acf367f2bd36409bcbb7443451ec83188ab589d Mon Sep 17 00:00:00 2001
From: Vassil Vassilev <v.g.vassi...@gmail.com>
Date: Tue, 23 Apr 2024 18:07:06 +0000
Subject: [PATCH] [clang-repl] Extend the C support.
The IdResolver chain is the main way for C to implement lookup rules. Every new
partial translation unit caused clang to exit the top-most scope which in turn
cleaned up the IdResolver chain. That was not an issue for C++ because its
lookup is implemented on the level of declaration contexts.
This patch keeps the IdResolver chain across partial translation units
maintaining proper C-style lookup infrastructure.
---
clang/lib/Interpreter/IncrementalParser.cpp | 13 +++++++++++--
clang/lib/Sema/SemaDecl.cpp | 10 +++++++---
clang/test/Interpreter/execute.c | 21 +++++++++++++++++++++
3 files changed, 39 insertions(+), 5 deletions(-)
create mode 100644 clang/test/Interpreter/execute.c
diff --git a/clang/lib/Interpreter/IncrementalParser.cpp
b/clang/lib/Interpreter/IncrementalParser.cpp
index ef90fe9e6f545..5bc8385d874a1 100644
--- a/clang/lib/Interpreter/IncrementalParser.cpp
+++ b/clang/lib/Interpreter/IncrementalParser.cpp
@@ -387,8 +387,7 @@ std::unique_ptr<llvm::Module>
IncrementalParser::GenModule() {
void IncrementalParser::CleanUpPTU(PartialTranslationUnit &PTU) {
TranslationUnitDecl *MostRecentTU = PTU.TUPart;
- TranslationUnitDecl *FirstTU = MostRecentTU->getFirstDecl();
- if (StoredDeclsMap *Map = FirstTU->getPrimaryContext()->getLookupPtr()) {
+ if (StoredDeclsMap *Map = MostRecentTU->getPrimaryContext()->getLookupPtr())
{
for (auto &&[Key, List] : *Map) {
DeclContextLookupResult R = List.getLookupResult();
std::vector<NamedDecl *> NamedDeclsToRemove;
@@ -407,6 +406,16 @@ void IncrementalParser::CleanUpPTU(PartialTranslationUnit
&PTU) {
}
}
}
+
+ // FIXME: We should de-allocate MostRecentTU
+ for (Decl *D : MostRecentTU->decls()) {
+ auto *ND = dyn_cast<NamedDecl>(D);
+ if (!ND)
+ continue;
+ // Check if we need to clean up the IdResolver chain.
+ if (ND->getDeclName().getFETokenInfo())
+ getCI()->getSema().IdResolver.RemoveDecl(ND);
+ }
}
llvm::StringRef IncrementalParser::GetMangledName(GlobalDecl GD) const {
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 557fe10619c35..2dbf2ae64b436 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -2282,9 +2282,13 @@ void Sema::ActOnPopScope(SourceLocation Loc, Scope *S) {
if (LabelDecl *LD = dyn_cast<LabelDecl>(D))
CheckPoppedLabel(LD, *this, addDiag);
- // Remove this name from our lexical scope, and warn on it if we haven't
- // already.
- IdResolver.RemoveDecl(D);
+ // Partial translation units that are created in incremental processing
must
+ // not clean up the IdResolver because PTUs should take into account the
+ // declarations that came from previous PTUs.
+ if (!PP.isIncrementalProcessingEnabled())
+ IdResolver.RemoveDecl(D);
+
+ // Warn on it if we are shadowing a declaration.
auto ShadowI = ShadowingDecls.find(D);
if (ShadowI != ShadowingDecls.end()) {
if (const auto *FD = dyn_cast<FieldDecl>(ShadowI->second)) {
diff --git a/clang/test/Interpreter/execute.c b/clang/test/Interpreter/execute.c
new file mode 100644
index 0000000000000..44a3a32c93011
--- /dev/null
+++ b/clang/test/Interpreter/execute.c
@@ -0,0 +1,21 @@
+// REQUIRES: host-supports-jit
+// UNSUPPORTED: system-aix
+
+// RUN: cat %s | clang-repl -Xcc -xc -Xcc -Xclang -Xcc -verify | FileCheck %s
+// RUN: cat %s | clang-repl -Xcc -xc -Xcc -O2 -Xcc -Xclang -Xcc -verify|
FileCheck %s
+int printf(const char *, ...);
+int i = 42; err // expected-error{{use of undeclared identifier}}
+int i = 42;
+struct S { float f; struct S *m;} s = {1.0, 0};
+// FIXME: Making foo inline fails to emit the function.
+int foo() { return 42; }
+void run() { \
+ printf("i = %d\n", i); \
+ printf("S[f=%f, m=0x%llx]\n", s.f, (unsigned long long)s.m); \
+ int r3 = foo(); \
+}
+run();
+// CHECK: i = 42
+// CHECK-NEXT: S[f=1.000000, m=0x0]
+
+%quit
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
