This patch fixes a bug that can result in "insn does not satisfy its
constraints" if these splitters fire due to not getting ctr for the
jump insn. Since the jump insn can have any of r,m,d,wi,c,l as the
decremented count output, it's not sufficient to check for
gpc_reg_operand (which matches VSX regs for example). Seen after
correcting register_move_cost when the cost of gpr <-> vsx is much
lower. Since this is a prerequisite to fixing PR89271, I'm mentioning
that PR in the ChangeLog.
The <bd>tf_<mode> split had a further bug in that it wouldn't match
if the count output was m,d,wi, or l.
Bootstrapped etc. powerpc64le-linux. OK?
PR target/89271
* config/rs6000/rs6000.md (<bd>_<mode> split): Check for an int
output reg on add insn.
(<bd>tf_<mode> split): Likewise. Match predicates with insn.
diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 9dd222dc5d7..51b6b7a9660 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -12525,7 +12525,7 @@ (define_split
const0_rtx);
emit_insn (gen_rtx_SET (operands[3],
gen_rtx_COMPARE (CCmode, operands[1], const1_rtx)));
- if (gpc_reg_operand (operands[0], <MODE>mode))
+ if (int_reg_operand (operands[0], <MODE>mode))
emit_insn (gen_add<mode>3 (operands[0], operands[1], constm1_rtx));
else
{
@@ -12603,7 +12603,7 @@ (define_split
(const_int 0)]))
(match_operand 4)
(match_operand 5)))
- (set (match_operand:P 6 "int_reg_operand")
+ (set (match_operand:P 6 "nonimmediate_operand")
(plus:P (match_dup 0)
(const_int -1)))
(clobber (match_scratch:P 7))
@@ -12636,7 +12636,7 @@ (define_split
else
emit_insn (gen_cceq_ior_compare_complement (operands[9], andexpr,
ctrcmpcc,
operands[8], cccmp, ccin));
- if (gpc_reg_operand (operands[0], <MODE>mode))
+ if (int_reg_operand (ctrout, <MODE>mode))
emit_insn (gen_add<mode>3 (ctrout, ctr, constm1_rtx));
else
{
--
Alan Modra
Australia Development Lab, IBM
