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| author | Tsung Chun Lin <tclin914@gmail.com> | 2025-01-07 14:48:31 -0700 |
|---|---|---|
| committer | Jeff Law <jlaw@ventanamicro.com> | 2025-01-07 14:48:31 -0700 |
| commit | d953c2c5714ed8503c4ae1b7d059a62e4e9a0624 (patch) | |
| tree | f61a515981fa7bba2a81d75b0b2f0997aacec67b /gcc/expr.cc | |
| parent | c6b5398e9e3c387910e1736f06525a0724a84b3e (diff) | |
| download | gcc-d953c2c5714ed8503c4ae1b7d059a62e4e9a0624.zip gcc-d953c2c5714ed8503c4ae1b7d059a62e4e9a0624.tar.gz gcc-d953c2c5714ed8503c4ae1b7d059a62e4e9a0624.tar.bz2 | |
Prefer scalar_int_mode if the size - 1 is equal to UNITS_PER_WORD.
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 (widest_fixed_size_mode_for_size): Prefer scalar modes
over vector modes in more cases.
gcc/testsuite/
* gcc.target/riscv/rvv/autovec/pr113469.c: Update expected output.
* gcc.target/riscv/rvv/base/movqi-1.c: New test.
Diffstat (limited to 'gcc/expr.cc')
| -rw-r--r-- | gcc/expr.cc | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/expr.cc b/gcc/expr.cc index 635bb9e..235e795 100644 --- a/gcc/expr.cc +++ b/gcc/expr.cc @@ -1062,12 +1062,13 @@ 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)) { machine_mode mode; fixed_size_mode candidate; FOR_EACH_MODE_IN_CLASS (mode, MODE_VECTOR_INT) if (is_a<fixed_size_mode> (mode, &candidate) + && GET_MODE_SIZE (candidate) > UNITS_PER_WORD && GET_MODE_INNER (candidate) == QImode) { if (GET_MODE_SIZE (candidate) >= size) |