[PATCH] [COMMITTED] Fix PR aarch64/104474: ICE with vector float initializers and non-consts.

[apinski--- via Gcc-patches]

From: Andrew Pinski <apin...@marvell.com>

The problem here is that the aarch64 back-end was placing const0_rtx
into the constant vector RTL even if the mode was a floating point mode.
The fix is instead to use CONST0_RTX and pass the mode to select the
correct zero (either const_int or const_double).

Committed as obvious after a bootstrap/test on aarch64-linux-gnu with
no regressions.

        PR target/104474

gcc/ChangeLog:

        * config/aarch64/aarch64.cc
        (aarch64_sve_expand_vector_init_handle_trailing_constants):
        Use CONST0_RTX instead of const0_rtx for the non-constant elements.

gcc/testsuite/ChangeLog:

        * gcc.target/aarch64/sve/pr104474-1.c: New test.
        * gcc.target/aarch64/sve/pr104474-2.c: New test.
        * gcc.target/aarch64/sve/pr104474-3.c: New test.
---
 gcc/config/aarch64/aarch64.cc                     | 2 +-
 gcc/testsuite/gcc.target/aarch64/sve/pr104474-1.c | 9 +++++++++
 gcc/testsuite/gcc.target/aarch64/sve/pr104474-2.c | 9 +++++++++
 gcc/testsuite/gcc.target/aarch64/sve/pr104474-3.c | 9 +++++++++
 4 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.target/aarch64/sve/pr104474-1.c
 create mode 100644 gcc/testsuite/gcc.target/aarch64/sve/pr104474-2.c
 create mode 100644 gcc/testsuite/gcc.target/aarch64/sve/pr104474-3.c

diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
index 8dc6d55e0f2..828ee472be2 100644
--- a/gcc/config/aarch64/aarch64.cc
+++ b/gcc/config/aarch64/aarch64.cc
@@ -21164,7 +21164,7 @@ aarch64_sve_expand_vector_init_handle_trailing_constants
        {
          rtx x = builder.elt (i + nelts_reqd - n_trailing_constants);
          if (!valid_for_const_vector_p (elem_mode, x))
-           x = const0_rtx;
+           x = CONST0_RTX (elem_mode);
          v.quick_push (x);
        }
       rtx const_vec = v.build ();
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pr104474-1.c 
b/gcc/testsuite/gcc.target/aarch64/sve/pr104474-1.c
new file mode 100644
index 00000000000..9e5bfe64467
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pr104474-1.c
@@ -0,0 +1,9 @@
+/* { dg-options "-mcpu=neoverse-512tvb -frounding-math -msve-vector-bits=512" 
} */
+
+typedef float __attribute__((__vector_size__ (64))) F;
+
+F
+foo (void)
+{
+  return (F){68435453, 0, 0, 0, 0, 0, 0, 5, 0, 431144844};
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pr104474-2.c 
b/gcc/testsuite/gcc.target/aarch64/sve/pr104474-2.c
new file mode 100644
index 00000000000..02a4b6a8fdc
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pr104474-2.c
@@ -0,0 +1,9 @@
+/* { dg-options "-mcpu=neoverse-512tvb -msve-vector-bits=512" } */
+
+typedef float __attribute__((__vector_size__ (64))) F;
+
+F
+foo (float t)
+{
+  return (F){t, 0, 0, 0, 0, 0, 0, 5, 0, t};
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pr104474-3.c 
b/gcc/testsuite/gcc.target/aarch64/sve/pr104474-3.c
new file mode 100644
index 00000000000..7bed0142968
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pr104474-3.c
@@ -0,0 +1,9 @@
+/* { dg-options "-mcpu=neoverse-v1 -frounding-math -msve-vector-bits=256" } */
+
+typedef _Float16 __attribute__((__vector_size__ (32))) F;
+
+F
+foo (void)
+{
+  return (F){0, 6270, 0, 0, 0, 0, 0, 0, 3229, 0, 40};
+}
-- 
2.27.0