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* [gcc r11-3419] [RS6000] Count rldimi constant insns
@ 2020-09-24 3:23 Alan Modra
0 siblings, 0 replies; only message in thread
From: Alan Modra @ 2020-09-24 3:23 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:0075cea0fdccc2efb781f4f3c924007de37a3417
commit r11-3419-g0075cea0fdccc2efb781f4f3c924007de37a3417
Author: Alan Modra <amodra@gmail.com>
Date: Wed Apr 1 13:34:47 2020 +1030
[RS6000] Count rldimi constant insns
rldimi is generated by rs6000_emit_set_long_const when the high and
low 32 bits of a 64-bit constant are equal.
PR target/93012
* config/rs6000/rs6000.c (num_insns_constant_gpr): Count rldimi
constants correctly.
Diff:
---
gcc/config/rs6000/rs6000.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 6f204ca202a..5f4e2927a21 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -5731,7 +5731,7 @@ direct_return (void)
/* Helper for num_insns_constant. Calculate number of instructions to
load VALUE to a single gpr using combinations of addi, addis, ori,
- oris and sldi instructions. */
+ oris, sldi and rldimi instructions. */
static int
num_insns_constant_gpr (HOST_WIDE_INT value)
@@ -5759,7 +5759,7 @@ num_insns_constant_gpr (HOST_WIDE_INT value)
high >>= 1;
- if (low == 0)
+ if (low == 0 || low == high)
return num_insns_constant_gpr (high) + 1;
else if (high == 0)
return num_insns_constant_gpr (low) + 1;
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