[PATCH] LoongArch: Change the value of branch_cost from 2 to 6.

[Lulu Cheng]

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.
---
 gcc/config/loongarch/loongarch-def.c         |  4 ++--
 gcc/testsuite/gcc.target/loongarch/cmov_ii.c | 16 ++++++++++++++++
 2 files changed, 18 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 e744ee01d6d..430ef8b2d95 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 00000000000..466a4c1c9af
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/cmov_ii.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+/* { dg-final { scan-assembler "main:.*xor.*masknez.*maskeqz.*or.*" } }
+ */
+void printf (char *, ...);
+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;
+  printf ("%d\n", out);
+}
-- 
2.31.1