[PATCH] D69060: [Sema][Typo Correction] Fix another infinite loop on ambiguity
David Goldman via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Fri Oct 25 10:25:29 PDT 2019
This revision was not accepted when it landed; it landed in state "Needs Review".
This revision was automatically updated to reflect the committed changes.
Closed by commit rG7a2b704bf0cf: [Sema][Typo Correction] Fix another infinite loop on ambiguity (authored by dgoldman).
Changed prior to commit:
https://reviews.llvm.org/D69060?vs=225272&id=226455#toc
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D69060/new/
https://reviews.llvm.org/D69060
Files:
clang/lib/Sema/SemaExprCXX.cpp
clang/test/Sema/typo-correction-ambiguity.c
Index: clang/test/Sema/typo-correction-ambiguity.c
===================================================================
--- /dev/null
+++ clang/test/Sema/typo-correction-ambiguity.c
@@ -0,0 +1,14 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+// Check the following typo correction behavior in C:
+// - no typos are diagnosed when a call expression has ambiguous (multiple) corrections
+
+int v_63;
+
+void v_2_0(int v_452, int v_454) {}
+
+int v_3_0() {
+ for (int v_345 = 0 ; v_63;)
+ v_2_0(v_195, // expected-error {{use of undeclared identifier 'v_195'}}
+ v_231); // expected-error {{use of undeclared identifier 'v_231'}}
+}
Index: clang/lib/Sema/SemaExprCXX.cpp
===================================================================
--- clang/lib/Sema/SemaExprCXX.cpp
+++ clang/lib/Sema/SemaExprCXX.cpp
@@ -7780,8 +7780,9 @@
// If we found a valid result, double check to make sure it's not ambiguous.
if (!IsAmbiguous && !Res.isInvalid() && !AmbiguousTypoExprs.empty()) {
- auto SavedTransformCache = std::move(TransformCache);
- TransformCache.clear();
+ auto SavedTransformCache =
+ llvm::SmallDenseMap<TypoExpr *, ExprResult, 2>(TransformCache);
+
// Ensure none of the TypoExprs have multiple typo correction candidates
// with the same edit length that pass all the checks and filters.
while (!AmbiguousTypoExprs.empty()) {
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