From: olegendo <olegendo@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 8 May 2012 21:36:30 +0000 (+0000)
Subject: 	PR target/51244
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0e1dddb49b259c339934b3410ff5b70804977f21;p=thirdparty%2Fgcc.git

	PR target/51244
	* config/sh/sh.md (*branch_true, *branch_false): New insns.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@187298 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a3f5a8fd9d6c..aa5537aea02d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2012-05-08  Oleg Endo  <olegendo@gcc.gnu.org>
+
+	PR target/51244
+	* config/sh/sh.md (*branch_true, *branch_false): New insns.
+
 2012-05-08   Teresa Johnson  <tejohnson@google.com>
 
 	* gcov-io.h (__gcov_reset, __gcov_dump): Declare.
diff --git a/gcc/config/sh/sh.md b/gcc/config/sh/sh.md
index 914d5bf8b924..7167b920641a 100644
--- a/gcc/config/sh/sh.md
+++ b/gcc/config/sh/sh.md
@@ -7097,6 +7097,29 @@ label:
 }
   [(set_attr "type" "cbranch")])
 
+;; The *branch_true patterns help combine when trying to invert conditions.
+(define_insn "*branch_true"
+  [(set (pc) (if_then_else (ne (zero_extend:SI (subreg:QI (reg:SI T_REG) 0))
+			       (const_int 0))
+			   (label_ref (match_operand 0 "" ""))
+			   (pc)))]
+  "TARGET_SH1 && TARGET_LITTLE_ENDIAN"
+{
+  return output_branch (1, insn, operands);
+}
+  [(set_attr "type" "cbranch")])
+
+(define_insn "*branch_true"
+  [(set (pc) (if_then_else (ne (zero_extend:SI (subreg:QI (reg:SI T_REG) 3))
+			       (const_int 0))
+			   (label_ref (match_operand 0 "" ""))
+			   (pc)))]
+  "TARGET_SH1 && ! TARGET_LITTLE_ENDIAN"
+{
+  return output_branch (1, insn, operands);
+}
+  [(set_attr "type" "cbranch")])
+
 (define_insn "branch_false"
   [(set (pc) (if_then_else (eq (reg:SI T_REG) (const_int 0))
 			   (label_ref (match_operand 0 "" ""))
@@ -7107,6 +7130,29 @@ label:
 }
   [(set_attr "type" "cbranch")])
 
+;; The *branch_false patterns help combine when trying to invert conditions.
+(define_insn "*branch_false"
+  [(set (pc) (if_then_else (eq (zero_extend:SI (subreg:QI (reg:SI T_REG) 0))
+			       (const_int 0))
+			   (label_ref (match_operand 0 "" ""))
+			   (pc)))]
+  "TARGET_SH1 && TARGET_LITTLE_ENDIAN"
+{
+  return output_branch (0, insn, operands);
+}
+  [(set_attr "type" "cbranch")])
+
+(define_insn "*branch_false"
+  [(set (pc) (if_then_else (eq (zero_extend:SI (subreg:QI (reg:SI T_REG) 3))
+			       (const_int 0))
+			   (label_ref (match_operand 0 "" ""))
+			   (pc)))]
+  "TARGET_SH1 && ! TARGET_LITTLE_ENDIAN"
+{
+  return output_branch (0, insn, operands);
+}
+  [(set_attr "type" "cbranch")])
+
 ;; Patterns to prevent reorg from re-combining a condbranch with a branch
 ;; which destination is too far away.
 ;; The const_int_operand is distinct for each branch target; it avoids
@@ -9721,7 +9767,7 @@ label:
   ""
   [(const_int 0)])
 
-;; The *movtt patterns improve code at -O1.
+;; The *movtt patterns eliminate redundant T bit to T bit moves / tests.
 (define_insn_and_split "*movtt"
   [(set (reg:SI T_REG)
 	(eq:SI (zero_extend:SI (subreg:QI (reg:SI T_REG) 3))