On 2/27/24 8:25 AM, Jeff Law wrote:
On 2/25/24 21:53, Greg McGary wrote:
Add option -m(no-)autovec-segment to enable/disable autovectorizer
from emitting vector segment load/store instructions. This is useful for
performance experiments.
gcc/ChangeLog:
* config/riscv/autovec.md
On 2/26/24 5:17 PM, Greg McGary wrote:
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr113010.c
b/gcc/testsuite/gcc.c-torture/execute/pr113010.c
new file mode 100644
index 000..a95c613c1df
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr113010.c
@@ -0,0 +1,9 @@
+int
The sign-bit-copies of a sign-extending load cannot be known until runtime on
WORD_REGISTER_OPERATIONS targets, except in the case of a zero-extending MEM
load. See the fix for PR112758.
2024-02-22 Greg McGary
PR rtl-optimization/113010
* combine.cc (simplify_comparison
Add option -m(no-)autovec-segment to enable/disable autovectorizer
from emitting vector segment load/store instructions. This is useful for
performance experiments.
gcc/ChangeLog:
* config/riscv/autovec.md (vec_mask_len_load_lanes,
vec_mask_len_store_lanes):
Predicate with
On 2/22/24 2:08 PM, Jakub Jelinek wrote:
On Thu, Feb 22, 2024 at 12:59:18PM -0800, Greg McGary wrote:
The sign bit of a sign-extending load cannot be known until runtime,
so don't attempt to simplify it in the combiner.
2024-02-22 Greg McGary
PR rtl-optimization/113010
The sign bit of a sign-extending load cannot be known until runtime,
so don't attempt to simplify it in the combiner.
2024-02-22 Greg McGary
PR rtl-optimization/113010
* combine.cc (simplify_comparison): Don't simplify high part
of paradoxical-SUBREG-of-MEM on machines
On 2/4/24 9:58 PM, Jeff Law wrote:
On 2/2/24 15:48, Greg McGary wrote:
input: (sign_extend:DI (mem/c:SI (symbol_ref:DI ("minus_1") [flags
0x86] ) [1 minus_1+0 S4 A32]))
result: (subreg:DI (mem/c:SI (symbol_ref:DI ("minus_1") [flags 0x86]
) [1 minus_1+0 S4 A32]) 0)
On 2/1/24 10:24 PM, Jeff Law wrote:
On 2/1/24 18:24, Greg McGary wrote:
However, for a machine where (WORD_REGISTER_OPERATIONS &&
load_extend_op (inner_mode) == SIGN_EXTEND), the high part of a PSoM
is only known at runtime as 0s or 1s. That's the downstream bug. The
fix for such
On 1/18/24 9:24 AM, Jeff Law wrote:
On 1/17/24 20:53, Greg McGary wrote:
While the code comment is true, perhaps it obscures the primary intent,
which is recognition that the pattern (SIGN_EXTEND (mem ...) ) is
destined
to expand into a single memory-load instruction and no simplification
On Tue, Jan 16, 2024 at 11:44 PM Richard Biener
wrote:
> > On Tue, Jan 16, 2024 at 11:20 PM Greg McGary wrote:
> > >
> > > The sign bit of a sign-extending load cannot be known until runtime,
> > > so don't attempt to simplify it in the combiner.
>
The sign bit of a sign-extending load cannot be known until runtime,
so don't attempt to simplify it in the combiner.
2024-01-11 Greg McGary
PR rtl-optimization/113010
* combine.cc (expand_compound_operation): Don't simplify
SIGN_EXTEND of a MEM
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