From: Lulu Cheng <chenglulu@loongson.cn>
Date: Wed, 13 Sep 2023 03:01:34 +0000 (+0800)
Subject: LoongArch: Change the value of branch_cost from 2 to 6.
X-Git-Tag: basepoints/gcc-15~6162
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3acf7e9da39360dab6ebb9dfc92208e9dadd982a;p=thirdparty%2Fgcc.git

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.
---

diff --git a/gcc/config/loongarch/loongarch-def.c b/gcc/config/loongarch/loongarch-def.c
index e744ee01d6d7..430ef8b2d957 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 000000000000..21b468e8ae14
--- /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;
+}