HI Andrew,
> -----Original Message----- > From: Andrew Bennett [mailto:andrew.benn...@imgtec.com] > Sent: Tuesday, July 21, 2015 10:56 AM > To: gcc-patches@gcc.gnu.org > Cc: Matthew Fortune; Moore, Catherine > Subject: [PATCH] MIPS: Add the lo register to the clobber list in the madd-8.c > and msub-8.c testcases > > Hi, > > The lo register is not listed in the clobber list in the inline asm statement > for > the madd-8.c and msub-8.c testcases. This means that when building for the > n64 ABI GCC is free to use the lo register instead of the stack when > saving/restoring the clobbered registers. Then then means that it decides to > use the msub/madd instruction to perform the "x - y * z" operation rather > than using mul; addu/subu which the test is looking for. > > The following patch therefore adds the lo register to the clobber list for the > madd-8.c and msub-8.c testcases. The patch has been tested on the mti/img > elf/linux-gnu toolchains, and there have been no new regressions. > > The patch and ChangeLog are below. > > Ok to commit? > > Yes, this looks OK.
