sparse-llvm: pseudo_to_value: Assertion `sym->ident == ((void *)0)' failed

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

Hi folks !

Haven't had a chance to investigate further today (and probably won't)
so I'm shooting this here just in case ;-)

I was tracking down what looks like an LLVM bug with sign extension from
1-bit integers while playing with llvmpipe (gallium llvm backend) and
out of curiosity decided to look at what sparse generated when
sign-extending a bool :-)

So I added to my earlier hello.c some statements to that effect, and
trying to compile it results in:

sparse-llvm.c:311: pseudo_to_value: Assertion `sym->ident == ((void *)0)' failed.

The new hello.c is:

#include <stdio.h>
#include <stdbool.h>

int main(void)
{
        int i;
        double f1,f2;
        bool eq;

        printf("Hello World !\n");

        for (i = 0; i < 10; i ++)
                printf("I can count to %d\n", i);

        printf("f1=");
        scanf("%f",&f1);
        printf("f2=");
        scanf("%f",&f2);

        eq = f1 == f2;

        printf("f1==f2: %d\n", (int)eq);
        return 0;
}

Cheers,
Ben.