Issue Description

slangc fails to warn about uninitialized variables when they are assigned to inout parameters.

Reproducer Code

// compile with:
// slangc shader.slang -target cpp -entry main -stage compute -o /dev/null

[shader("compute")]
[numthreads(1, 1, 1)]

void test(inout float x) {
    float uninit;
    x = uninit; // <--- use of uninitialized variable
}

void main() {
    float x;
    test(x);
    printf("%f\n", x);
}

Expected Behavior

warning[E41016]: use of uninitialized variable 'uninit'

Actual Behavior

No warning.

Environment

• Slang Version: 2026.9.1 and 2026.10-13-gd25453d7f
• OS: Linux

Additional context

With an out instead of inout slangc says "warning[E41018]: returning without initializing out parameter" (which is also slightly wrong imo, I'd complain about the use of 'uninit' instead).