Message ID | 442332F3-027C-4985-8DCF-563C929CBE0E@sandoe.co.uk |
---|---|
State | New |
Headers | show |
Series | FIO, powerpc-darwin mangling patch [7.x and earlier]. | expand |
On Nov 27, 2018, at 7:05 AM, Iain Sandoe <iain@sandoe.co.uk> wrote: > > So it turns out that the Darwin PPC port was broken essentially “forever” (before the tidy-up in 8.2) with respect to mangling the symbols for __ibm128 type (the default long double for the port). > > In 7.x and earlier (at least back to Apple’s 4.2.1) the use passes right through rs6000_mangle_type, which causes it to mangle to ‘e’ - which is the representation for long double as a 64b value (-mlong-double-64). > > This is fixable, even quite easily, but I think it’s better to have the break in the upstream sources on a major boundary (so we leave it alone and have the correction in 8+) So, I'll pre-approve the back port to all active gcc release branches for anyway that cares. This is the perfect type of fix to back port in my book.
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index d377e24..ccb771b 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -35375,6 +35375,10 @@ rs6000_mangle_type (const_tree type) && !TARGET_IEEEQUAD) return "g"; + if (TARGET_MACHO && type == long_double_type_node + && TREE_INT_CST_LOW (TYPE_SIZE (type)) == 128) + return "g"; + /* For all other types, use normal C++ mangling. */ return NULL; }