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File _service:tar_scm:LoongArch-Change-the-value-of-branch_cost-from-2-to-.patch of Package gcc
From 7e843ed8da168a05eb04eee0b14cbe681bf798fe Mon Sep 17 00:00:00 2001 From: Lulu Cheng <chenglulu@loongson.cn> Date: Wed, 13 Sep 2023 11:01:34 +0800 Subject: [PATCH 123/124] LoongArch: Change the value of branch_cost from 2 to 6. gcc/ChangeLog: * config/loongarch/loongarch-def.c: Modify the default value of branch_cost. gcc/testsuite/ChangeLog: * gcc.target/loongarch/cmov_ii.c: New test. Signed-off-by: Peng Fan <fanpeng@loongson.cn> Signed-off-by: ticat_fp <fanpeng@loongson.cn> --- gcc/config/loongarch/loongarch-def.c | 4 ++-- gcc/testsuite/gcc.target/loongarch/cmov_ii.c | 15 +++++++++++++++ 2 files changed, 17 insertions(+), 2 deletions(-) create mode 100644 gcc/testsuite/gcc.target/loongarch/cmov_ii.c diff --git a/gcc/config/loongarch/loongarch-def.c b/gcc/config/loongarch/loongarch-def.c index d29d5f001..eeb32dbf6 100644 --- a/gcc/config/loongarch/loongarch-def.c +++ b/gcc/config/loongarch/loongarch-def.c @@ -85,7 +85,7 @@ loongarch_cpu_align[N_TUNE_TYPES] = { .int_mult_di = COSTS_N_INSNS (1), \ .int_div_si = COSTS_N_INSNS (4), \ .int_div_di = COSTS_N_INSNS (6), \ - .branch_cost = 2, \ + .branch_cost = 6, \ .memory_latency = 4 /* The following properties cannot be looked up directly using "cpucfg". @@ -118,7 +118,7 @@ loongarch_rtx_cost_optimize_size = { .int_mult_di = 4, .int_div_si = 4, .int_div_di = 4, - .branch_cost = 2, + .branch_cost = 6, .memory_latency = 4, }; diff --git a/gcc/testsuite/gcc.target/loongarch/cmov_ii.c b/gcc/testsuite/gcc.target/loongarch/cmov_ii.c new file mode 100644 index 000000000..21b468e8a --- /dev/null +++ b/gcc/testsuite/gcc.target/loongarch/cmov_ii.c @@ -0,0 +1,15 @@ +/* { dg-do compile } */ +/* { dg-options "-O2" } */ +/* { dg-final { scan-assembler "test:.*xor.*maskeqz.*masknez.*or.*" } } */ + +extern void foo_ii (int *, int *, int *, int *); + +int +test (void) +{ + int a, b; + int c, d, out; + foo_ii (&a, &b, &c, &d); + out = a == b ? c : d; + return out; +} -- 2.33.0
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