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| author | Jiahao Xu <xujiahao@loongson.cn> | 2024-01-16 10:32:31 +0800 |
|---|---|---|
| committer | Lulu Cheng <chenglulu@loongson.cn> | 2024-01-26 16:11:29 +0800 |
| commit | dddafe948230b4895f8d4371eee7996fb2dba44a (patch) | |
| tree | 35c24ae49d647e2914b9ec57dec9636b1e6c8c2d | |
| parent | 9e7947a66737c43cdec026b1f9c8149c5eba6c40 (diff) | |
| download | gcc-dddafe948230b4895f8d4371eee7996fb2dba44a.zip gcc-dddafe948230b4895f8d4371eee7996fb2dba44a.tar.gz gcc-dddafe948230b4895f8d4371eee7996fb2dba44a.tar.bz2 | |
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.
| -rw-r--r-- | gcc/config/loongarch/loongarch.h | 1 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/loongarch/short-circuit.c | 19 |
2 files changed, 20 insertions, 0 deletions
diff --git a/gcc/config/loongarch/loongarch.h b/gcc/config/loongarch/loongarch.h index 4e6ede9..8b453ab 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 0000000..bed585e --- /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" } } */ |