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| author | Ulrich Weigand <uweigand@de.ibm.com> | 2014-03-28 12:42:40 +0000 |
|---|---|---|
| committer | Ulrich Weigand <uweigand@gcc.gnu.org> | 2014-03-28 12:42:40 +0000 |
| commit | bd302a183af5190fb504174099a9085c3859bc93 (patch) | |
| tree | e4709c0ed404f735efc54de5f4354533f2ad7cf9 /gcc | |
| parent | efeaaaafad228f4d451b399b93880a2b037561a0 (diff) | |
| download | gcc-bd302a183af5190fb504174099a9085c3859bc93.zip gcc-bd302a183af5190fb504174099a9085c3859bc93.tar.gz gcc-bd302a183af5190fb504174099a9085c3859bc93.tar.bz2 | |
rs6000.c (fusion_gpr_load_p): Refuse optimization if it would clobber the stack pointer, even temporarily.
* config/rs6000/rs6000.c (fusion_gpr_load_p): Refuse optimization
if it would clobber the stack pointer, even temporarily.
From-SVN: r208895
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/rs6000/rs6000.c | 5 |
2 files changed, 10 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index faca258..82f387c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2014-03-28 Ulrich Weigand <Ulrich.Weigand@de.ibm.com> + + * config/rs6000/rs6000.c (fusion_gpr_load_p): Refuse optimization + if it would clobber the stack pointer, even temporarily. + 2014-03-28 Eric Botcazou <ebotcazou@adacore.com> * mode-switching.c: Make small adjustments to the top comment. diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index cd85257..d9606a1 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -32523,6 +32523,11 @@ fusion_gpr_load_p (rtx *operands, bool peep2_p) if (!peep2_reg_dead_p (2, addis_reg)) return false; + + /* If the target register being loaded is the stack pointer, we must + avoid loading any other value into it, even temporarily. */ + if (REG_P (target) && REGNO (target) == STACK_POINTER_REGNUM) + return false; } base_reg = XEXP (addr, 0); |