https://gcc.gnu.org/g:d8f2b4f1781ca02d3f74cc88467f97c2d68b471e
commit r15-9963-gd8f2b4f1781ca02d3f74cc88467f97c2d68b471e
Author: Alexey Merzlyakov <alexey.merzlya...@samsung.com>
Date: Wed Jul 2 11:29:00 2025 -0600
[PATCH] [RISC-V] Fix shift type for RVV interleaved stepped patterns
[PR120356]
It corrects the shift type of interleaved stepped patterns for const vector
expanding in LRA. The shift instruction was initially LSHIFTRT, and it seems
still should be the same type for both LRA and other cases.
PR target/120356
gcc/ChangeLog:
* config/riscv/riscv-v.cc
(expand_const_vector_interleaved_stepped_npatterns):
Fix ASHIFT to LSHIFTRT insn.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/pr120356.c: New test.
(cherry picked from commit 9c1ed63e4c6b0f80dd47ce421dd7d80d52c38fd3)
Diff:
---
gcc/config/riscv/riscv-v.cc | 2 +-
.../gcc.target/riscv/rvv/autovec/pr120356.c | 26 ++++++++++++++++++++++
2 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/gcc/config/riscv/riscv-v.cc b/gcc/config/riscv/riscv-v.cc
index aae2d274336e..d04665319ab3 100644
--- a/gcc/config/riscv/riscv-v.cc
+++ b/gcc/config/riscv/riscv-v.cc
@@ -1587,7 +1587,7 @@ expand_const_vector (rtx target, rtx src)
rtx shift = gen_int_mode (1, Xmode);
rtx shift_ops[] = {shifted_vid, vid, shift};
emit_vlmax_insn (code_for_pred_scalar
- (ASHIFT, mode), BINARY_OP,
+ (LSHIFTRT, mode), BINARY_OP,
shift_ops);
}
else
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr120356.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr120356.c
new file mode 100644
index 000000000000..2913f04e4c83
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr120356.c
@@ -0,0 +1,26 @@
+/* { dg-do run } */
+/* { dg-require-effective-target rvv_zvl256b_ok } */
+/* { dg-options "-march=rv64gcv_zvl256b -mabi=lp64d -mrvv-vector-bits=zvl -O2"
} */
+
+unsigned char a = 5;
+long long c[18];
+
+static void d ()
+{
+ for (short i = 0; i < 60; i += 65413)
+ for (char j = 0; j < 18; j++)
+ {
+ for (char k = 0; k < 18; k++)
+ a *= 143;
+ for (char k = 0; k < 6; k++)
+ for (char l = 0; l < 18; l++)
+ c[l] = 0;
+ }
+}
+
+int main ()
+{
+ d ();
+ if (a + c[0] != 69)
+ __builtin_abort ();
+}
