https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116415
--- Comment #6 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Peter Bergner from comment #5)
> I'm testing a fix.
>
> Our P8 swap optimization has some special handling for TImode usage. The
> __atomic_compare_exchange call introduces a PTImode use and that should have
> the same special handling that TImode has, but doesn't. The simple fix
> fixes the attached test case for me and PASSes all of the swap-p8-*.c
> testsuite test cases. My full bootstrap and regtesting is running.
FYI, here is the fix that survived bootstrap and regtesting with no regressions
which I'll submit.
diff --git a/gcc/config/rs6000/rs6000-p8swap.cc
b/gcc/config/rs6000/rs6000-p8swap.cc
index 639f477d782..15e44bb63a6 100644
--- a/gcc/config/rs6000/rs6000-p8swap.cc
+++ b/gcc/config/rs6000/rs6000-p8swap.cc
@@ -2469,10 +2469,11 @@ rs6000_analyze_swaps (function *fun)
mode = V4SImode;
}
- if (ALTIVEC_OR_VSX_VECTOR_MODE (mode) || mode == TImode)
+ if (ALTIVEC_OR_VSX_VECTOR_MODE (mode) || mode == TImode
+ || mode == PTImode)
{
insn_entry[uid].is_relevant = 1;
- if (mode == TImode || mode == V1TImode
+ if (mode == TImode || mode == PTImode || mode == V1TImode
|| FLOAT128_VECTOR_P (mode))
insn_entry[uid].is_128_int = 1;
if (DF_REF_INSN_INFO (mention))
@@ -2497,10 +2498,11 @@ rs6000_analyze_swaps (function *fun)
&& ALTIVEC_OR_VSX_VECTOR_MODE (GET_MODE (SET_DEST (insn))))
mode = GET_MODE (SET_DEST (insn));
- if (ALTIVEC_OR_VSX_VECTOR_MODE (mode) || mode == TImode)
+ if (ALTIVEC_OR_VSX_VECTOR_MODE (mode) || mode == TImode
+ || mode == PTImode)
{
insn_entry[uid].is_relevant = 1;
- if (mode == TImode || mode == V1TImode
+ if (mode == TImode || mode == PTImode || mode == V1TImode
|| FLOAT128_VECTOR_P (mode))
insn_entry[uid].is_128_int = 1;
if (DF_REF_INSN_INFO (mention))
