[gcc r12-7159] [COMMITTED] Fix PR aarch64/104474: ICE with vector float initializers and non-consts.

[Andrew Pinski <pinskia@gcc.gnu.org>]

https://gcc.gnu.org/g:41582f88ec01c5ce2f85ebc4ac2743eb426d6e33

commit r12-7159-g41582f88ec01c5ce2f85ebc4ac2743eb426d6e33
Author: Andrew Pinski <apinski@marvell.com>
Date:   Wed Feb 9 14:56:58 2022 -0800

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

Diff:
---
 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(-)

diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
index 7bb97bd48e4..e3f18fbe7da 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};
+}