http://llvm.org/bugs/show_bug.cgi?id=15307
Bug ID: 15307
Summary: Incorrect "Assigned value is always the same as the
existing value"
Product: clang
Version: 3.0
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Static Analyzer
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
It appears that the static analyzer doesn't understand C structure
copies. The warning below would be correct without the "*a = *b;"
statement.
typedef struct {
int x;
int y;
} bar;
void
foo (bar *a, bar *b)
{
int x;
x = a->x;
*a = *b;
a->x = x;
}
welinder@anemone ~ $ scan-build -v make aaa.o
scan-build: 'clang' executable not found in '/usr/share/clang/scan-build/bin'.
scan-build: Using 'clang' from path: /usr/bin/clang
scan-build: Emitting reports for this run to '/tmp/scan-build-2013-02-19-5'.
/usr/share/clang/scan-build/ccc-analyzer -c -o aaa.o aaa.c
aaa.c:13:8: warning: Assigned value is always the same as the existing value
a->x = x;
~~~~ ^ ~
1 warning generated.
scan-build: 1 bugs found.
welinder@anemone ~ $ clang --version
Ubuntu clang version 3.0-6ubuntu3 (tags/RELEASE_30/final) (based on LLVM 3.0)
Target: x86_64-pc-linux-gnu
Thread model: posix
--
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
LLVMbugs mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
