On 6/26/23 06:18, Juzhe-Zhong wrote:
Currently, we are able to generate step vector with base == 0:
{ 0, 0, 2, 2, 4, 4, ... }
ASM:
vid
vand
However, we do wrong for step vector with base != 0:
{ 1, 1, 3, 3, 5, 5, ... }
Before this patch, such case will run fail.
After this patch, we are able to pass the testcase and generate the step vector
with asm:
vid
vand
vadd
gcc/ChangeLog:
* config/riscv/riscv-v.cc (expand_const_vector): Fix stepped vector
with base != 0.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/partial/slp-17.c: New test.
* gcc.target/riscv/rvv/autovec/partial/slp-18.c: New test.
* gcc.target/riscv/rvv/autovec/partial/slp-19.c: New test.
* gcc.target/riscv/rvv/autovec/partial/slp_run-17.c: New test.
* gcc.target/riscv/rvv/autovec/partial/slp_run-18.c: New test.
* gcc.target/riscv/rvv/autovec/partial/slp_run-19.c: New test.
diff --git a/gcc/config/riscv/riscv-v.cc b/gcc/config/riscv/riscv-v.cc
index 5518394be1e..cd3422bf711 100644
--- a/gcc/config/riscv/riscv-v.cc
+++ b/gcc/config/riscv/riscv-v.cc
@@ -1258,7 +1258,6 @@ expand_const_vector (rtx target, rtx src)
}
emit_move_insn (target, tmp);
}
- return;
}
else if (CONST_VECTOR_STEPPED_P (src))
{
Was removal of the "return" intentional here? I'm not real familiar
with this code, but it doesn't look related to the case you're trying to
fix.
The rest of the code looks quite sensible.
Jeff
