mips: check MSA support for vector modes [PR100760,PR100761,PR100762]

Check if the vector mode is really supported by MSA in certain cases,
instead of testing ISA_HAS_MSA.  Simply testing ISA_HAS_MSA can cause
ICE when MSA is enabled besides other MIPS SIMD extensions (notably,
Loongson MMI).

gcc/

	PR target/100760
	PR target/100761
	PR target/100762
	* config/mips/mips.c (mips_const_insns): Use MSA_SUPPORTED_MODE_P
	instead of ISA_HAS_MSA.
	(mips_expand_vec_unpack): Likewise.
	(mips_expand_vector_init): Likewise.

gcc/testsuite/

	PR target/100760
	PR target/100761
	PR target/100762
	* gcc.target/mips/pr100760.c: New test.
	* gcc.target/mips/pr100761.c: New test.
	* gcc.target/mips/pr100762.c: New test.

4 files changed, 55 insertions, 3 deletions

diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c
index 1f1475c..00a8eef 100644
--- a/gcc/config/mips/mips.c
+++ b/gcc/config/mips/mips.c
@@ -2879,7 +2879,7 @@ mips_const_insns (rtx x)
       return mips_build_integer (codes, INTVAL (x));
 
     case CONST_VECTOR:
-      if (ISA_HAS_MSA
+      if (MSA_SUPPORTED_MODE_P (GET_MODE (x))
 	  && mips_const_vector_same_int_p (x, GET_MODE (x), -512, 511))
 	return 1;
       /* Fall through.  */
@@ -21732,7 +21732,7 @@ mips_expand_vec_unpack (rtx operands[2], bool unsigned_p, bool high_p)
   rtx (*cmpFunc) (rtx, rtx, rtx);
   rtx tmp, dest, zero;
 
-  if (ISA_HAS_MSA)
+  if (MSA_SUPPORTED_MODE_P (imode))
     {
       switch (imode)
 	{
@@ -21994,7 +21994,7 @@ mips_expand_vector_init (rtx target, rtx vals)
 	all_same = false;
     }
 
-  if (ISA_HAS_MSA)
+  if (MSA_SUPPORTED_MODE_P (vmode))
     {
       if (all_same)
 	{
diff --git a/gcc/testsuite/gcc.target/mips/pr100760.c b/gcc/testsuite/gcc.target/mips/pr100760.c
new file mode 100644
index 0000000..d715b85
--- /dev/null
+++ b/gcc/testsuite/gcc.target/mips/pr100760.c
@@ -0,0 +1,10 @@
+/* PR target/100760
+   This was triggering an ICE with "maximum number of generated reload
+   insns per insn achieved (90)" when compiled with -mmsa -mloongson-mmi. */
+
+/* { dg-do compile } */
+/* { dg-options "-mmsa -mloongson-mmi" } */
+
+typedef __INT32_TYPE__ int32_t;
+typedef int32_t a __attribute__((__vector_size__(8)));
+void b() { a x = (a){1, 1}; }
diff --git a/gcc/testsuite/gcc.target/mips/pr100761.c b/gcc/testsuite/gcc.target/mips/pr100761.c
new file mode 100644
index 0000000..cc2598e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/mips/pr100761.c
@@ -0,0 +1,17 @@
+/* PR target/100761
+   This was triggering an ICE in mips_expand_vec_unpack when compiled with
+   -mmsa -mloongson-mmi. */
+
+/* { dg-do compile } */
+/* { dg-options "-mmsa -mloongson-mmi" } */
+
+typedef __INT8_TYPE__ int8_t;
+typedef __INT16_TYPE__ int16_t;
+typedef int8_t i8x8 __attribute__((__vector_size__(8)));
+typedef int16_t i16x8 __attribute__((__vector_size__(16)));
+
+i8x8 a;
+
+void f() {
+  i16x8 b = __builtin_convertvector (a, i16x8);
+}
diff --git a/gcc/testsuite/gcc.target/mips/pr100762.c b/gcc/testsuite/gcc.target/mips/pr100762.c
new file mode 100644
index 0000000..89c1185
--- /dev/null
+++ b/gcc/testsuite/gcc.target/mips/pr100762.c
@@ -0,0 +1,25 @@
+/* PR target/100762
+   This was triggering an ICE in mips_expand_vector_init when compiled with
+   -mmsa -mloongson-mmi. */
+
+/* { dg-do compile } */
+/* { dg-options "-mmsa -mloongson-mmi" } */
+
+typedef __INT32_TYPE__ int32_t;
+typedef int32_t i32x2 __attribute__((__vector_size__(8)));
+
+i32x2 cmp(i32x2 a, i32x2 b) {
+  return a >= b;
+}
+
+i32x2 shift(i32x2 a, i32x2 b) {
+  return a >> b;
+}
+
+i32x2 mul(i32x2 a, i32x2 b) {
+  return a * b;
+}
+
+i32x2 div(i32x2 a, i32x2 b) {
+  return a / b;
+}