From: Jim Tsung-Chun Lin <j...@andestech.com>
Re-sending this via git send-email to avoid the application/octet-stream
attachement type that prevents Patchworks/CI from finding the patch.
---
Don't use the QI vector if its size is equal to UNITS_PER_WORD for
better code generation.
Before patch:
vsetivli zero,4,e8,mf4,ta,ma
vmv.v.i v1,0
addi a4,sp,12
vse8.v v1,0(a4)
After patch:
sw zero,12(sp)
---
gcc/expr.cc | 2 +-
gcc/testsuite/gcc.target/riscv/rvv/autovec/pr113469.c | 1 -
2 files changed, 1 insertion(+), 2 deletions(-)
diff --git a/gcc/expr.cc b/gcc/expr.cc
index babf00f34dc..e2abef1f544 100644
--- a/gcc/expr.cc
+++ b/gcc/expr.cc
@@ -1062,7 +1062,7 @@ widest_fixed_size_mode_for_size (unsigned int size,
by_pieces_operation op)
gcc_checking_assert (size > 1);
/* Use QI vector only if size is wider than a WORD. */
- if (can_use_qi_vectors (op) && size > UNITS_PER_WORD)
+ if (can_use_qi_vectors (op) && (size - 1) > UNITS_PER_WORD)
{
machine_mode mode;
fixed_size_mode candidate;
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr113469.c
b/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr113469.c
index 52e2580c53e..6549ae61c67 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr113469.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/pr113469.c
@@ -51,5 +51,4 @@ void p(int buf, __builtin_va_list ab, int q) {
} while (k);
}
-/* { dg-final { scan-assembler-times
{vsetivli\tzero,\s*4,\s*e8,\s*mf4,\s*t[au],\s*m[au]} 1 } } */
/* { dg-final { scan-assembler-times
{vsetivli\tzero,\s*8,\s*e8,\s*mf2,\s*t[au],\s*m[au]} 1 } } */
--
2.34.1
