062f662fe2
Symptoms of the problem included assembler warnings and nondeterministic runtime behavior when a fe*() call that affects the fpsr is closely followed by a float point op. The bug (at least, I think it's a bug) is that gcc does not insert a break between a volatile asm and a dependent instruction if the volatile asm came from an inlined function. Volatile asms seem to be fine in other circumstances, even without -mvolatile-asm-stop, so perhaps the compiler adds the stop bits before inlining takes place. The problem does not occur at -O0 because inlining is disabled, and it doesn't happen at -O2 because -fschedule-insns2 knows better. |
||
|---|---|---|
| .. | ||
| alpha | ||
| amd64 | ||
| arm | ||
| bsdsrc | ||
| i387 | ||
| ia64 | ||
| man | ||
| powerpc | ||
| sparc64 | ||
| src | ||
| Makefile | ||