https://gcc.gnu.org/g:1c6880c740c478980a8e09325ec7c5939a7f0a09
commit r13-9837-g1c6880c740c478980a8e09325ec7c5939a7f0a09
Author: Richard Sandiford <richard.sandif...@arm.com>
Date: Thu Aug 14 21:55:28 2025 +0100
aarch64: Use VNx16BI for svrev_b* [PR121294]
The previous patch for PR121294 handled svtrn1/2, svuzp1/2, and svzip1/2.
This one extends it to handle svrev intrinsics, where the same kind of
wrong code can be generated.
gcc/
PR target/121294
* config/aarch64/aarch64.md (UNSPEC_REV_PRED): New unspec.
* config/aarch64/aarch64-sve.md (@aarch64_sve_rev<mode>_acle)
(*aarch64_sve_rev<mode>_acle): New patterns.
* config/aarch64/aarch64-sve-builtins-base.cc
(svrev_impl::expand): Use the new patterns for boolean svrev.
gcc/testsuite/
PR target/121294
* gcc.target/aarch64/sve/acle/general/rev_2.c: New test.
(cherry picked from commit 701193a7a6d3f3f345bf336e7ebc7d6fa1e0c5ac)
Diff:
---
gcc/config/aarch64/aarch64-sve-builtins-base.cc | 5 +++-
gcc/config/aarch64/aarch64-sve.md | 25 +++++++++++++++++++-
gcc/config/aarch64/aarch64.md | 1 +
.../gcc.target/aarch64/sve/acle/general/rev_2.c | 27 ++++++++++++++++++++++
4 files changed, 56 insertions(+), 2 deletions(-)
diff --git a/gcc/config/aarch64/aarch64-sve-builtins-base.cc
b/gcc/config/aarch64/aarch64-sve-builtins-base.cc
index 85585c5941c8..dc5f41e01ccb 100644
--- a/gcc/config/aarch64/aarch64-sve-builtins-base.cc
+++ b/gcc/config/aarch64/aarch64-sve-builtins-base.cc
@@ -2032,7 +2032,10 @@ public:
rtx
expand (function_expander &e) const override
{
- return e.use_exact_insn (code_for_aarch64_sve_rev (e.vector_mode (0)));
+ auto mode = e.vector_mode (0);
+ return e.use_exact_insn (e.type_suffix (0).bool_p
+ ? code_for_aarch64_sve_rev_acle (mode)
+ : code_for_aarch64_sve_rev (mode));
}
};
diff --git a/gcc/config/aarch64/aarch64-sve.md
b/gcc/config/aarch64/aarch64-sve.md
index 1187746e5946..9cb09187c620 100644
--- a/gcc/config/aarch64/aarch64-sve.md
+++ b/gcc/config/aarch64/aarch64-sve.md
@@ -8834,7 +8834,30 @@
(unspec:PRED_ALL [(match_operand:PRED_ALL 1 "register_operand" "Upa")]
UNSPEC_REV))]
"TARGET_SVE"
- "rev\t%0.<Vetype>, %1.<Vetype>")
+ "rev\t%0.<Vetype>, %1.<Vetype>"
+)
+
+(define_expand "@aarch64_sve_rev<mode>_acle"
+ [(set (match_operand:VNx16BI 0 "register_operand")
+ (unspec:VNx16BI
+ [(match_operand:VNx16BI 1 "register_operand")
+ (match_dup:PRED_ALL 2)]
+ UNSPEC_REV_PRED))]
+ "TARGET_SVE"
+ {
+ operands[2] = CONST0_RTX (<MODE>mode);
+ }
+)
+
+(define_insn "*aarch64_sve_rev<mode>_acle"
+ [(set (match_operand:VNx16BI 0 "register_operand" "=Upa")
+ (unspec:VNx16BI
+ [(match_operand:VNx16BI 1 "register_operand" "Upa")
+ (match_operand:PRED_ALL 2 "aarch64_simd_imm_zero")]
+ UNSPEC_REV_PRED))]
+ "TARGET_SVE"
+ "rev\t%0.<Vetype>, %1.<Vetype>"
+)
;; -------------------------------------------------------------------------
;; ---- [PRED] Special-purpose binary permutes
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index ff74e7dcef65..d9798edce505 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -203,6 +203,7 @@
UNSPEC_PACIBSP
UNSPEC_PRLG_STK
UNSPEC_REV
+ UNSPEC_REV_PRED
UNSPEC_RBIT
UNSPEC_SABAL
UNSPEC_SABAL2
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/acle/general/rev_2.c
b/gcc/testsuite/gcc.target/aarch64/sve/acle/general/rev_2.c
new file mode 100644
index 000000000000..3dc4eb928546
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sve/acle/general/rev_2.c
@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+#include <arm_sve.h>
+
+svbool_t test1()
+{
+ return svrev_b16 (svptrue_b16 ());
+}
+
+svbool_t test2()
+{
+ return svrev_b32 (svptrue_b32 ());
+}
+
+svbool_t test3()
+{
+ return svrev_b64 (svptrue_b64 ());
+}
+
+/* { dg-final { scan-assembler {\tptrue\tp[0-7]\.h} } } */
+/* { dg-final { scan-assembler {\tptrue\tp[0-7]\.s} } } */
+/* { dg-final { scan-assembler {\tptrue\tp[0-7]\.d} } } */
+/* { dg-final { scan-assembler-not {\tptrue\tp[0-7]\.b} } } */
+/* { dg-final { scan-assembler {\trev\tp0\.h} } } */
+/* { dg-final { scan-assembler {\trev\tp0\.s} } } */
+/* { dg-final { scan-assembler {\trev\tp0\.d} } } */
