[gcc r12-8728] sve: Fix fcmuo combine patterns [PR106524]

[Tamar Christina <tnfchris@gcc.gnu.org>]

https://gcc.gnu.org/g:e927d1cf141f221c5a32574bde0913307e140984

commit r12-8728-ge927d1cf141f221c5a32574bde0913307e140984
Author: Tamar Christina <tamar.christina@arm.com>
Date:   Fri Aug 12 12:28:41 2022 +0100

    sve: Fix fcmuo combine patterns [PR106524]
    
    There's no encoding for fcmuo with zero.  This restricts the combine patterns
    from accepting zero registers.
    
    gcc/ChangeLog:
    
            PR target/106524
            * config/aarch64/aarch64-sve.md (*fcmuo<mode>_nor_combine,
            *fcmuo<mode>_bic_combine): Don't accept comparisons against zero.
    
    gcc/testsuite/ChangeLog:
    
            PR target/106524
            * gcc.target/aarch64/sve/pr106524.c: New test.
    
    (cherry picked from commit f4ff20d464f90c85919ce2e7fa63e204dcda4e40)

Diff:
---
 gcc/config/aarch64/aarch64-sve.md               |  4 ++--
 gcc/testsuite/gcc.target/aarch64/sve/pr106524.c | 11 +++++++++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/gcc/config/aarch64/aarch64-sve.md b/gcc/config/aarch64/aarch64-sve.md
index bd60e65b0c3..e08bee197d8 100644
--- a/gcc/config/aarch64/aarch64-sve.md
+++ b/gcc/config/aarch64/aarch64-sve.md
@@ -8231,7 +8231,7 @@
 	        [(match_operand:<VPRED> 1)
 	         (const_int SVE_KNOWN_PTRUE)
 	         (match_operand:SVE_FULL_F 2 "register_operand" "w")
-	         (match_operand:SVE_FULL_F 3 "aarch64_simd_reg_or_zero" "wDz")]
+	         (match_operand:SVE_FULL_F 3 "register_operand" "w")]
 	        UNSPEC_COND_FCMUO))
 	    (match_operand:<VPRED> 4 "register_operand" "Upa"))
 	  (match_dup:<VPRED> 1)))
@@ -8267,7 +8267,7 @@
 	        [(match_operand:<VPRED> 1)
 	         (const_int SVE_KNOWN_PTRUE)
 	         (match_operand:SVE_FULL_F 2 "register_operand" "w")
-	         (match_operand:SVE_FULL_F 3 "aarch64_simd_reg_or_zero" "wDz")]
+	         (match_operand:SVE_FULL_F 3 "register_operand" "w")]
 	        UNSPEC_COND_FCMUO))
 	    (not:<VPRED>
 	      (match_operand:<VPRED> 4 "register_operand" "Upa")))
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pr106524.c b/gcc/testsuite/gcc.target/aarch64/sve/pr106524.c
new file mode 100644
index 00000000000..a9f650f971a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pr106524.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+sve -O2 -fno-move-loop-invariants" } */
+
+void
+test__zero (int *restrict dest, int *restrict src, float *a, int count)
+{
+  int i;
+
+  for (i = 0; i < count; ++i)
+    dest[i] = !__builtin_isunordered (a[i], 0) ? src[i] : 0;
+}