Forget about this patch.
I found a better and reasonable way to fix it.
juzhe.zh...@rivai.ai
From: Juzhe-Zhong
Date: 2023-09-07 22:05
To: gcc-patches
CC: kito.cheng; kito.cheng; jeffreyalaw; rdapp.gcc; Juzhe-Zhong
Subject: [PATCH] RISC-V: Replace rtx REG for zero REGS operations
This patch fixes these following FAILs:
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -O0 (internal compiler error:
in gen_reg_rtx, at emit-rtl.cc:1176)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -O0 (test for excess errors)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -O1 (internal compiler error:
in gen_reg_rtx, at emit-rtl.cc:1176)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -O1 (test for excess errors)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -O2 (internal compiler error:
in gen_reg_rtx, at emit-rtl.cc:1176)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -O2 (test for excess errors)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none (internal compiler error: in gen_reg_rtx, at
emit-rtl.cc:1176)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none (test for excess errors)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects (internal compiler error: in gen_reg_rtx, at
emit-rtl.cc:1176)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects (test for excess errors)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -O3 -g (internal compiler
error: in gen_reg_rtx, at emit-rtl.cc:1176)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -O3 -g (test for excess errors)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -Os (internal compiler error:
in gen_reg_rtx, at emit-rtl.cc:1176)
FAIL: gcc.target/riscv/zero-scratch-regs-3.c -Os (test for excess errors)
These FAILs because regno_reg_rtx[regno] is VLS mode in some regno which is not
VLMAX AVL
gcc/ChangeLog:
* config/riscv/riscv.cc (vector_zero_call_used_regs): Fix bug.
---
gcc/config/riscv/riscv.cc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index a3d3389e7e2..c0c9c990a23 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -8998,7 +8998,7 @@ vector_zero_call_used_regs (HARD_REG_SET
need_zeroed_hardregs)
{
if (TEST_HARD_REG_BIT (need_zeroed_hardregs, regno))
{
- rtx target = regno_reg_rtx[regno];
+ rtx target = gen_rtx_REG (RVVM1SImode, regno);
machine_mode mode = GET_MODE (target);
if (!emitted_vlmax_vsetvl)
--
2.36.3
