[gcc(refs/users/guojiufu/heads/personal-branch)] RISC-V: Unify the output asm pattern between gpr_save and gpr_restore pattern.

[gcc(refs/users/guojiufu/heads/personal-branch)] RISC-V: Unify the output asm pattern between gpr_save and gpr_restore pattern.

[Jiu Fu Guo]

https://gcc.gnu.org/g:dcf41a4e6033213f5e5f80da23080df961d83996

commit dcf41a4e6033213f5e5f80da23080df961d83996
Author: Kito Cheng <kito.cheng@sifive.com>
Date:   Wed Jun 10 19:41:06 2020 -0700

    RISC-V: Unify the output asm pattern between gpr_save and gpr_restore pattern.
    
    gcc/ChangeLog:
    
            * config/riscv/riscv-protos.h (riscv_output_gpr_save): Remove.
            * config/riscv/riscv-sr.c (riscv_sr_match_prologue): Update
            value.
            * config/riscv/riscv.c (riscv_output_gpr_save): Remove.
            * config/riscv/riscv.md (gpr_save): Update output asm pattern.

Diff:
---
 gcc/config/riscv/riscv-protos.h |  1 -
 gcc/config/riscv/riscv-sr.c     |  2 +-
 gcc/config/riscv/riscv.c        | 16 +---------------
 gcc/config/riscv/riscv.md       |  2 +-
 4 files changed, 3 insertions(+), 18 deletions(-)

diff --git a/gcc/config/riscv/riscv-protos.h b/gcc/config/riscv/riscv-protos.h
index 9cda6a88879..358224af898 100644
--- a/gcc/config/riscv/riscv-protos.h
+++ b/gcc/config/riscv/riscv-protos.h
@@ -53,7 +53,6 @@ extern rtx riscv_subword (rtx, bool);
 extern bool riscv_split_64bit_move_p (rtx, rtx);
 extern void riscv_split_doubleword_move (rtx, rtx);
 extern const char *riscv_output_move (rtx, rtx);
-extern const char *riscv_output_gpr_save (unsigned);
 extern const char *riscv_output_return ();
 #ifdef RTX_CODE
 extern void riscv_expand_int_scc (rtx, enum rtx_code, rtx, rtx);
diff --git a/gcc/config/riscv/riscv-sr.c b/gcc/config/riscv/riscv-sr.c
index b8fe9d08fb0..9af50ef028e 100644
--- a/gcc/config/riscv/riscv-sr.c
+++ b/gcc/config/riscv/riscv-sr.c
@@ -115,7 +115,7 @@ riscv_sr_match_prologue (rtx_insn **body)
       && GET_CODE (XVECEXP (PATTERN (insn), 0, 0)) == UNSPEC_VOLATILE
       && (GET_CODE (XVECEXP (XVECEXP (PATTERN (insn), 0, 0), 0, 0))
 	  == CONST_INT)
-      && INTVAL (XVECEXP (XVECEXP (PATTERN (insn), 0, 0), 0, 0)) == 2)
+      && INTVAL (XVECEXP (XVECEXP (PATTERN (insn), 0, 0), 0, 0)) == 0)
     return insn;
 
   return NULL;
diff --git a/gcc/config/riscv/riscv.c b/gcc/config/riscv/riscv.c
index c11ed060116..02ebf1945ea 100644
--- a/gcc/config/riscv/riscv.c
+++ b/gcc/config/riscv/riscv.c
@@ -3951,20 +3951,6 @@ riscv_restore_reg (rtx reg, rtx mem)
   RTX_FRAME_RELATED_P (insn) = 1;
 }
 
-/* Return the code to invoke the GPR save routine.  */
-
-const char *
-riscv_output_gpr_save (unsigned mask)
-{
-  static char s[32];
-  unsigned n = riscv_save_libcall_count (mask);
-
-  ssize_t bytes = snprintf (s, sizeof (s), "call\tt0,__riscv_save_%u", n);
-  gcc_assert ((size_t) bytes < sizeof (s));
-
-  return s;
-}
-
 /* For stack frames that can't be allocated with a single ADDI instruction,
    compute the best value to initially allocate.  It must at a minimum
    allocate enough space to spill the callee-saved registers.  If TARGET_RVC,
@@ -5199,7 +5185,7 @@ riscv_gen_gpr_save_insn (struct riscv_frame_info *frame)
 
   RTVEC_ELT (vec, 0) =
     gen_rtx_UNSPEC_VOLATILE (VOIDmode,
-      gen_rtvec (1, GEN_INT (frame->mask)), UNSPECV_GPR_SAVE);
+      gen_rtvec (1, GEN_INT (count)), UNSPECV_GPR_SAVE);
 
   for (int i = 1; i < veclen; ++i)
     {
diff --git a/gcc/config/riscv/riscv.md b/gcc/config/riscv/riscv.md
index d9028c50b9a..36012ad1f77 100644
--- a/gcc/config/riscv/riscv.md
+++ b/gcc/config/riscv/riscv.md
@@ -2445,7 +2445,7 @@
      [(unspec_volatile [(match_operand 0 "const_int_operand")]
 	               UNSPECV_GPR_SAVE)])]
   ""
-  { return riscv_output_gpr_save (INTVAL (operands[0])); })
+  "call\tt0,__riscv_save_%0")
 
 (define_insn "gpr_restore"
   [(unspec_volatile [(match_operand 0 "const_int_operand")] UNSPECV_GPR_RESTORE)]