From: Alexander Shaposhnikov <shal1t712@gmail.com>
Date: Fri, 22 Sep 2017 18:36:06 +0000 (+0000)
Subject: [clang] Fix printf fixit for objc specific types
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=cc76a8176ee9da9a1c3a5ede43d606b9c727b1ce;p=clang

[clang] Fix printf fixit for objc specific types

For the triple thumbv7-apple-ios8.0.0 ssize_t is long and size_t is unsigned long,
while NSInteger is int and NSUinteger is unsigned int. Following
https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/Strings/Articles/formatSpecifiers.html
Clang catches it and insert a cast to long, for example
 printf("%zd", getNSInteger())
will be replaced with
 printf("%zd", (long)getNSInteger())
but since the underlying type of ssize_t is long the specifier "%zd" is not getting replaced.
This diff changes this behavior to enable replacing the specifier "%zd" with the correct one.

Differential revision: https://reviews.llvm.org/D38159

Test plan: make check-all


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@314011 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index 956136859a..1828dc6c04 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -6346,7 +6346,7 @@ CheckPrintfHandler::checkFormatExpr(const analyze_printf::PrintfSpecifier &FS,
       CastFix << ")";
 
       SmallVector<FixItHint,4> Hints;
-      if (!AT.matchesType(S.Context, IntendedTy))
+      if (!AT.matchesType(S.Context, IntendedTy) || ShouldNotPrintDirectly) 
         Hints.push_back(FixItHint::CreateReplacement(SpecRange, os.str()));
 
       if (const CStyleCastExpr *CCast = dyn_cast<CStyleCastExpr>(E)) {
diff --git a/test/FixIt/fixit-format-ios.m b/test/FixIt/fixit-format-ios.m
new file mode 100644
index 0000000000..ef66430778
--- /dev/null
+++ b/test/FixIt/fixit-format-ios.m
@@ -0,0 +1,26 @@
+// RUN: cp %s %t
+// RUN: %clang_cc1 -triple thumbv7-apple-ios8.0.0 -fsyntax-only -Wformat -fixit %t
+// RUN: grep -v CHECK %t | FileCheck %s
+
+int printf(const char * restrict, ...);
+typedef unsigned int NSUInteger;
+typedef int NSInteger;
+NSUInteger getNSUInteger();
+NSInteger getNSInteger();
+
+void test() {
+  // For thumbv7-apple-ios8.0.0 the underlying type of ssize_t is long
+  // and the underlying type of size_t is unsigned long.
+
+  printf("test 1: %zu", getNSUInteger()); 
+  // CHECK: printf("test 1: %lu", (unsigned long)getNSUInteger());
+
+  printf("test 2: %zu %zu", getNSUInteger(), getNSUInteger());
+  // CHECK: printf("test 2: %lu %lu", (unsigned long)getNSUInteger(), (unsigned long)getNSUInteger());
+
+  printf("test 3: %zd", getNSInteger()); 
+  // CHECK: printf("test 3: %ld", (long)getNSInteger());
+
+  printf("test 4: %zd %zd", getNSInteger(), getNSInteger());
+  // CHECK: printf("test 4: %ld %ld", (long)getNSInteger(), (long)getNSInteger());
+}