[gcc r12-5334] i386: Fix non-robust split condition in define_insn_and_split

[gcc r12-5334] i386: Fix non-robust split condition in define_insn_and_split

[Kewen Lin]

https://gcc.gnu.org/g:bf5f41e4fcc396b359f096231a37a3cb411cc9df

commit r12-5334-gbf5f41e4fcc396b359f096231a37a3cb411cc9df
Author: Kewen Lin <linkw@linux.ibm.com>
Date:   Wed Nov 17 04:02:20 2021 -0600

    i386: Fix non-robust split condition in define_insn_and_split
    
    This patch is to fix some non-robust split conditions in some
    define_insn_and_splits, to make each of them applied on top of
    the corresponding condition for define_insn part, otherwise the
    splitting could perform unexpectedly.
    
    gcc/ChangeLog:
    
            * config/i386/i386.md (*add<dwi>3_doubleword, *addv<dwi>4_doubleword,
            *addv<dwi>4_doubleword_1, *sub<dwi>3_doubleword,
            *subv<dwi>4_doubleword, *subv<dwi>4_doubleword_1,
            *add<dwi>3_doubleword_cc_overflow_1, *divmodsi4_const,
            *neg<dwi>2_doubleword, *tls_dynamic_gnu2_combine_64_<mode>): Fix split
            condition.

Diff:
---
 gcc/config/i386/i386.md | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 73949063030..73d15de88b2 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -5491,7 +5491,7 @@
    (clobber (reg:CC FLAGS_REG))]
   "ix86_binary_operator_ok (PLUS, <DWI>mode, operands)"
   "#"
-  "reload_completed"
+  "&& reload_completed"
   [(parallel [(set (reg:CCC FLAGS_REG)
 		   (compare:CCC
 		     (plus:DWIH (match_dup 1) (match_dup 2))
@@ -6300,7 +6300,7 @@
 	(plus:<DWI> (match_dup 1) (match_dup 2)))]
   "ix86_binary_operator_ok (PLUS, <DWI>mode, operands)"
   "#"
-  "reload_completed"
+  "&& reload_completed"
   [(parallel [(set (reg:CCC FLAGS_REG)
 		   (compare:CCC
 		     (plus:DWIH (match_dup 1) (match_dup 2))
@@ -6347,7 +6347,7 @@
    && CONST_SCALAR_INT_P (operands[2])
    && rtx_equal_p (operands[2], operands[3])"
   "#"
-  "reload_completed"
+  "&& reload_completed"
   [(parallel [(set (reg:CCC FLAGS_REG)
 		   (compare:CCC
 		     (plus:DWIH (match_dup 1) (match_dup 2))
@@ -6641,7 +6641,7 @@
    (clobber (reg:CC FLAGS_REG))]
   "ix86_binary_operator_ok (MINUS, <MODE>mode, operands)"
   "#"
-  "reload_completed"
+  "&& reload_completed"
   [(parallel [(set (reg:CC FLAGS_REG)
 		   (compare:CC (match_dup 1) (match_dup 2)))
 	      (set (match_dup 0)
@@ -6817,7 +6817,7 @@
 	(minus:<DWI> (match_dup 1) (match_dup 2)))]
   "ix86_binary_operator_ok (MINUS, <MODE>mode, operands)"
   "#"
-  "reload_completed"
+  "&& reload_completed"
   [(parallel [(set (reg:CC FLAGS_REG)
 		   (compare:CC (match_dup 1) (match_dup 2)))
 	      (set (match_dup 0)
@@ -6862,7 +6862,7 @@
    && CONST_SCALAR_INT_P (operands[2])
    && rtx_equal_p (operands[2], operands[3])"
   "#"
-  "reload_completed"
+  "&& reload_completed"
   [(parallel [(set (reg:CC FLAGS_REG)
 		   (compare:CC (match_dup 1) (match_dup 2)))
 	      (set (match_dup 0)
@@ -7542,7 +7542,7 @@
 	(plus:<DWI> (match_dup 1) (match_dup 2)))]
   "ix86_binary_operator_ok (PLUS, <DWI>mode, operands)"
   "#"
-  "reload_completed"
+  "&& reload_completed"
   [(parallel [(set (reg:CCC FLAGS_REG)
 		   (compare:CCC
 		     (plus:DWIH (match_dup 1) (match_dup 2))
@@ -9000,7 +9000,7 @@
    (clobber (reg:CC FLAGS_REG))]
   "!optimize_function_for_size_p (cfun)"
   "#"
-  "reload_completed"
+  "&& reload_completed"
   [(set (match_dup 0) (match_dup 2))
    (set (match_dup 1) (match_dup 4))
    (parallel [(set (match_dup 0)
@@ -10515,7 +10515,7 @@
    (clobber (reg:CC FLAGS_REG))]
   "ix86_unary_operator_ok (NEG, <DWI>mode, operands)"
   "#"
-  "reload_completed"
+  "&& reload_completed"
   [(parallel
     [(set (reg:CCC FLAGS_REG)
 	  (ne:CCC (match_dup 1) (const_int 0)))
@@ -16908,7 +16908,7 @@
    (clobber (reg:CC FLAGS_REG))]
   "TARGET_64BIT && TARGET_GNU2_TLS"
   "#"
-  ""
+  "&& 1"
   [(set (match_dup 0) (match_dup 4))]
 {
   operands[4] = can_create_pseudo_p () ? gen_reg_rtx (ptr_mode) : operands[0];