[PATCH v1] RISC-V: Bugfix ICE non-vector in TARGET_FUNCTION_VALUE_REGNO_P

[pan2.li@intel.com]

From: Pan Li <pan2.li@intel.com>

This patch would like to fix one ICE when vector is not enabled
in hook TARGET_FUNCTION_VALUE_REGNO_P implementation.  The vector
regno is available if and only if the TARGET_VECTOR is true.  The
previous implement missed this condition and then result in ICE
when rv64gc build option without vector.

	PR target/114639

The below test suite is passed for this patch.

* The rv64gcv fully regression tests.
* The rv64gc fully regression tests.

gcc/ChangeLog:

	* config/riscv/riscv.cc (riscv_function_value_regno_p): Add
	TARGET_VECTOR predicate for V_RETURN regno.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/pr114639-1.c: New test.
	* gcc.target/riscv/pr114639-2.c: New test.
	* gcc.target/riscv/pr114639-3.c: New test.
	* gcc.target/riscv/pr114639-4.c: New test.

Signed-off-by: Pan Li <pan2.li@intel.com>
---
 gcc/config/riscv/riscv.cc                   |  2 +-
 gcc/testsuite/gcc.target/riscv/pr114639-1.c | 11 +++++++++++
 gcc/testsuite/gcc.target/riscv/pr114639-2.c | 11 +++++++++++
 gcc/testsuite/gcc.target/riscv/pr114639-3.c | 11 +++++++++++
 gcc/testsuite/gcc.target/riscv/pr114639-4.c | 11 +++++++++++
 5 files changed, 45 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.target/riscv/pr114639-1.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/pr114639-2.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/pr114639-3.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/pr114639-4.c

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 91f017dd52a..e5f00806bb9 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -11008,7 +11008,7 @@ riscv_function_value_regno_p (const unsigned regno)
   if (FP_RETURN_FIRST <= regno && regno <= FP_RETURN_LAST)
     return true;
 
-  if (regno == V_RETURN)
+  if (TARGET_VECTOR && regno == V_RETURN)
     return true;
 
   return false;
diff --git a/gcc/testsuite/gcc.target/riscv/pr114639-1.c b/gcc/testsuite/gcc.target/riscv/pr114639-1.c
new file mode 100644
index 00000000000..f41723193a4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/pr114639-1.c
@@ -0,0 +1,11 @@
+/* Test that we do not have ice when compile */
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gc -mabi=lp64d -std=gnu89 -O3" } */
+
+g (a, b) {}
+
+f (xx)
+     void* xx;
+{
+  __builtin_apply ((void*)g, xx, 200);
+}
diff --git a/gcc/testsuite/gcc.target/riscv/pr114639-2.c b/gcc/testsuite/gcc.target/riscv/pr114639-2.c
new file mode 100644
index 00000000000..0c402c4b254
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/pr114639-2.c
@@ -0,0 +1,11 @@
+/* Test that we do not have ice when compile */
+/* { dg-do compile } */
+/* { dg-options "-march=rv64imac -mabi=lp64 -std=gnu89 -O3" } */
+
+g (a, b) {}
+
+f (xx)
+     void* xx;
+{
+  __builtin_apply ((void*)g, xx, 200);
+}
diff --git a/gcc/testsuite/gcc.target/riscv/pr114639-3.c b/gcc/testsuite/gcc.target/riscv/pr114639-3.c
new file mode 100644
index 00000000000..ffb0d6d162d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/pr114639-3.c
@@ -0,0 +1,11 @@
+/* Test that we do not have ice when compile */
+/* { dg-do compile } */
+/* { dg-options "-march=rv32gc -mabi=ilp32d -std=gnu89 -O3" } */
+
+g (a, b) {}
+
+f (xx)
+     void* xx;
+{
+  __builtin_apply ((void*)g, xx, 200);
+}
diff --git a/gcc/testsuite/gcc.target/riscv/pr114639-4.c b/gcc/testsuite/gcc.target/riscv/pr114639-4.c
new file mode 100644
index 00000000000..a6e229101ef
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/pr114639-4.c
@@ -0,0 +1,11 @@
+/* Test that we do not have ice when compile */
+/* { dg-do compile } */
+/* { dg-options "-march=rv32imac -mabi=ilp32 -std=gnu89 -O3" } */
+
+g (a, b) {}
+
+f (xx)
+     void* xx;
+{
+  __builtin_apply ((void*)g, xx, 200);
+}
-- 
2.34.1