r289762 - Fix printf specifier handling: invalid specifier should not be marked as "consuming data arguments"

[Mehdi Amini via cfe-commits]

Author: mehdi_amini
Date: Wed Dec 14 22:51:22 2016
New Revision: 289762

URL: http://llvm.org/viewvc/llvm-project?rev=289762&view=rev
Log:
Fix printf specifier handling: invalid specifier should not be marked as "consuming data arguments"

Modified:
    cfe/trunk/include/clang/Analysis/Analyses/FormatString.h
    cfe/trunk/test/CodeGen/builtins.c

Modified: cfe/trunk/include/clang/Analysis/Analyses/FormatString.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Analysis/Analyses/FormatString.h?rev=289762&r1=289761&r2=289762&view=diff
==============================================================================
--- cfe/trunk/include/clang/Analysis/Analyses/FormatString.h (original)
+++ cfe/trunk/include/clang/Analysis/Analyses/FormatString.h Wed Dec 14 22:51:22 2016
@@ -211,6 +211,8 @@ public:
         return false;
       case PercentArg:
         return false;
+      case InvalidSpecifier:
+        return false;
       default:
         return true;
     }

Modified: cfe/trunk/test/CodeGen/builtins.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/builtins.c?rev=289762&r1=289761&r2=289762&view=diff
==============================================================================
--- cfe/trunk/test/CodeGen/builtins.c (original)
+++ cfe/trunk/test/CodeGen/builtins.c Wed Dec 14 22:51:22 2016
@@ -538,6 +538,34 @@ void test_builtin_os_log_precision_width
   __builtin_os_log_format(buf, "Hello %*.*s World", precision, width, data);
 }
 
+// CHECK-LABEL: define void @test_builtin_os_log_invalid
+// CHECK: (i8* [[BUF:%.*]], i32 [[DATA:%.*]])
+void test_builtin_os_log_invalid(void *buf, int data) {
+  volatile int len;
+  // CHECK: store i8* [[BUF]], i8** [[BUF_ADDR:%.*]], align 8
+  // CHECK: store i32 [[DATA]], i32* [[DATA_ADDR:%.*]]
+
+  // CHECK: store volatile i32 8,
+  len = __builtin_os_log_format_buffer_size("invalid specifier %: %d even a trailing one%", data);
+
+  // CHECK: [[BUF2:%.*]] = load i8*, i8** [[BUF_ADDR]]
+  // CHECK: [[SUMMARY:%.*]] = getelementptr i8, i8* [[BUF2]], i64 0
+  // CHECK: store i8 0, i8* [[SUMMARY]]
+  // CHECK: [[NUM_ARGS:%.*]] = getelementptr i8, i8* [[BUF2]], i64 1
+  // CHECK: store i8 1, i8* [[NUM_ARGS]]
+
+  // CHECK: [[ARG1_DESC:%.*]] = getelementptr i8, i8* [[BUF2]], i64 2
+  // CHECK: store i8 0, i8* [[ARG1_DESC]]
+  // CHECK: [[ARG1_SIZE:%.*]] = getelementptr i8, i8* [[BUF2]], i64 3
+  // CHECK: store i8 4, i8* [[ARG1_SIZE]]
+  // CHECK: [[ARG1:%.*]] = getelementptr i8, i8* [[BUF2]], i64 4
+  // CHECK: [[ARG1_INT:%.*]] = bitcast i8* [[ARG1]] to i32*
+  // CHECK: [[ARG1_VAL:%.*]] = load i32, i32* [[DATA_ADDR]]
+  // CHECK: store i32 [[ARG1_VAL]], i32* [[ARG1_INT]]
+
+  __builtin_os_log_format(buf, "invalid specifier %: %d even a trailing one%", data);
+}
+
 // CHECK-LABEL: define void @test_builtin_os_log_percent
 // CHECK: (i8* [[BUF:%.*]], i8* [[DATA1:%.*]], i8* [[DATA2:%.*]])
 // Check that the %% which does not consume any argument is correctly handled