| Issue |
149289
|
| Summary |
[X86] Uninitialized variable warnings in immintrin.h - static analyzer - __builtin_ia32_rdsspd / __builtin_ia32_rdsspq
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
buscher
|
Kind of related to https://github.com/llvm/llvm-project/issues/55224 , but for the static analyzer.
For the code
```
#include <x86intrin.h>
int main() {
return 0;
}
```
when I execute:
```
scan-build -analyze-headers cc main.c
```
I get:
```
scan-build: Using '/usr/lib/llvm-20/bin/clang' for static analysis
In file included from main.c:2:
In file included from /usr/lib/llvm-20/lib/clang/20/include/x86intrin.h:15:
In file included from /usr/lib/llvm-20/lib/clang/20/include/immintrin.h:577:
/usr/lib/llvm-20/lib/clang/20/include/cetintrin.h:49:10: warning: 1st function call argument is an uninitialized value [core.CallAndMessage]
49 | return __builtin_ia32_rdsspd(t);
| ^~~~~~~~~~~~~~~~~~~~~~~~
/usr/lib/llvm-20/lib/clang/20/include/cetintrin.h:62:10: warning: 1st function call argument is an uninitialized value [core.CallAndMessage]
62 | return __builtin_ia32_rdsspq(t);
| ^~~~~~~~~~~~~~~~~~~~~~~~
2 warnings generated.
```
Happens with llvm/clang 14 and 20, did not test other versions.
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