public inbox for gcc-cvs@sourceware.org
help / color / mirror / Atom feed
* [gcc r14-8446] LoongArch: Define LOGICAL_OP_NON_SHORT_CIRCUIT
@ 2024-01-26 8:13 LuluCheng
0 siblings, 0 replies; only message in thread
From: LuluCheng @ 2024-01-26 8:13 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:dddafe948230b4895f8d4371eee7996fb2dba44a
commit r14-8446-gdddafe948230b4895f8d4371eee7996fb2dba44a
Author: Jiahao Xu <xujiahao@loongson.cn>
Date: Tue Jan 16 10:32:31 2024 +0800
LoongArch: Define LOGICAL_OP_NON_SHORT_CIRCUIT
Define LOGICAL_OP_NON_SHORT_CIRCUIT as 0, for a short-circuit branch, use the
short-circuit operation instead of the non-short-circuit operation.
SPEC2017 performance evaluation shows 1% performance improvement for fprate
GEOMEAN and no obvious regression for others. Especially, 526.blender_r +10.6%
on 3A6000.
This modification will introduce the following FAIL items:
FAIL: gcc.dg/tree-ssa/copy-headers-8.c scan-tree-dump-times ch2 "Conditional combines static and invariant" 1
FAIL: gcc.dg/tree-ssa/copy-headers-8.c scan-tree-dump-times ch2 "Will duplicate bb" 2
FAIL: gcc.dg/tree-ssa/update-threading.c scan-tree-dump-times optimized "Invalid sum" 0
gcc/ChangeLog:
* config/loongarch/loongarch.h (LOGICAL_OP_NON_SHORT_CIRCUIT): Define.
gcc/testsuite/ChangeLog:
* gcc.target/loongarch/short-circuit.c: New test.
Diff:
---
gcc/config/loongarch/loongarch.h | 1 +
gcc/testsuite/gcc.target/loongarch/short-circuit.c | 19 +++++++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/gcc/config/loongarch/loongarch.h b/gcc/config/loongarch/loongarch.h
index 4e6ede926d32..8b453ab3140d 100644
--- a/gcc/config/loongarch/loongarch.h
+++ b/gcc/config/loongarch/loongarch.h
@@ -869,6 +869,7 @@ typedef struct {
1 is the default; other values are interpreted relative to that. */
#define BRANCH_COST(speed_p, predictable_p) la_branch_cost
+#define LOGICAL_OP_NON_SHORT_CIRCUIT 0
/* Return the asm template for a conditional branch instruction.
OPCODE is the opcode's mnemonic and OPERANDS is the asm template for
diff --git a/gcc/testsuite/gcc.target/loongarch/short-circuit.c b/gcc/testsuite/gcc.target/loongarch/short-circuit.c
new file mode 100644
index 000000000000..bed585ee1728
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/short-circuit.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math -fdump-tree-gimple" } */
+
+int
+short_circuit (float *a)
+{
+ float t1x = a[0];
+ float t2x = a[1];
+ float t1y = a[2];
+ float t2y = a[3];
+ float t1z = a[4];
+ float t2z = a[5];
+
+ if (t1x > t2y || t2x < t1y || t1x > t2z || t2x < t1z || t1y > t2z || t2y < t1z)
+ return 0;
+
+ return 1;
+}
+/* { dg-final { scan-tree-dump-times "if" 6 "gimple" } } */
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2024-01-26 8:13 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2024-01-26 8:13 [gcc r14-8446] LoongArch: Define LOGICAL_OP_NON_SHORT_CIRCUIT LuluCheng
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).