File _service:tar_scm:LoongArch-Change-the-value-of-... of Package gcc

File _service:tar_scm:LoongArch-Change-the-value-of-branch_cost-from-2-to-.patch of Package gcc (Revision 29e574783ba6e2f6e31316c043b061d2)

Currently displaying revision 29e574783ba6e2f6e31316c043b061d2 , Show latest

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