| Message ID | 20200915011946.3395-2-amodra@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [RS6000] Count rldimi constant insns | expand |
On Tue, Sep 15, 2020 at 10:49:39AM +0930, Alan Modra wrote: > rldimi is generated by rs6000_emit_set_long_const when the high and > low 32 bits of a 64-bit constant are equal. > > * config/rs6000/rs6000.c (num_insns_constant_gpr): Count rldimi > constants correctly. Wow, did I miss that? Whoops. (That was PR93012, 72b2f3317b44.) Okay for trunk. Thanks! Segher
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 20a4ba382bc..6fc86f8185a 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;