===================================================================
@@ -18,7 +18,7 @@
;; <http://www.gnu.org/licenses/>.
;;; Unused letters:
-;;; B H
+;;; H
;;; h j
;; Integer register constraints.
@@ -151,6 +151,11 @@
"@internal Constant call address operand."
(match_operand 0 "constant_call_address_operand"))
+(define_constraint "B"
+ "@internal Sibcall memory operand."
+ (and (not (match_test "TARGET_X32"))
+ (match_operand 0 "sibcall_memory_operand")))
+
(define_constraint "w"
"@internal Call memory operand."
(and (not (match_test "TARGET_X32"))
===================================================================
@@ -11376,12 +11376,41 @@
[(set_attr "type" "call")])
(define_insn "*sibcall"
- [(call (mem:QI (match_operand:W 0 "sibcall_insn_operand" "Uzm"))
+ [(call (mem:QI (match_operand:W 0 "sibcall_insn_operand" "UzB"))
(match_operand 1))]
"SIBLING_CALL_P (insn)"
"* return ix86_output_call_insn (insn, operands[0]);"
[(set_attr "type" "call")])
+; TODO
+(define_peephole2
+ [(set (match_operand:DI 0 "register_operand")
+ (match_operand:DI 1 "memory_operand"))
+ (unspec_volatile [(const_int 0)] UNSPECV_BLOCKAGE)]
+ "TARGET_64BIT"
+ [(unspec_volatile [(const_int 0)] UNSPECV_BLOCKAGE)
+ (set (match_dup 0)
+ (match_dup 1))])
+
+(define_peephole2
+ [(set (match_operand:SI 0 "register_operand")
+ (match_operand:SI 1 "memory_operand"))
+ (unspec_volatile [(const_int 0)] UNSPECV_BLOCKAGE)]
+ "!TARGET_64BIT"
+ [(unspec_volatile [(const_int 0)] UNSPECV_BLOCKAGE)
+ (set (match_dup 0)
+ (match_dup 1))])
+
+(define_peephole2
+ [(set (match_operand:DI 0 "register_operand")
+ (match_operand:DI 1 "memory_operand"))
+ (call (mem:QI (match_operand:DI 2 "register_operand"))
+ (match_operand 3))]
+ "TARGET_64BIT && REG_P (operands[0]) && 0
+ && REG_P (operands[2])
+ && REGNO (operands[0]) == REGNO (operands[2])"
+ [(call (mem:QI (match_dup 1)) (match_dup 1))])
+
(define_expand "call_pop"
[(parallel [(call (match_operand:QI 0)
(match_operand:SI 1))
@@ -11406,7 +11435,7 @@
[(set_attr "type" "call")])
(define_insn "*sibcall_pop"
- [(call (mem:QI (match_operand:SI 0 "sibcall_insn_operand" "Uzm"))
+ [(call (mem:QI (match_operand:SI 0 "sibcall_insn_operand" "UzB"))
(match_operand 1))
(set (reg:SI SP_REG)
(plus:SI (reg:SI SP_REG)
@@ -11451,7 +11480,7 @@
(define_insn "*sibcall_value"
[(set (match_operand 0)
- (call (mem:QI (match_operand:W 1 "sibcall_insn_operand" "Uzm"))
+ (call (mem:QI (match_operand:W 1 "sibcall_insn_operand" "UzB"))
(match_operand 2)))]
"SIBLING_CALL_P (insn)"
"* return ix86_output_call_insn (insn, operands[1]);"
@@ -11494,7 +11523,7 @@
(define_insn "*sibcall_value_pop"
[(set (match_operand 0)
- (call (mem:QI (match_operand:SI 1 "sibcall_insn_operand" "Uzm"))
+ (call (mem:QI (match_operand:SI 1 "sibcall_insn_operand" "UzB"))
(match_operand 2)))
(set (reg:SI SP_REG)
(plus:SI (reg:SI SP_REG)
===================================================================
@@ -0,0 +1,37 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target ia32 } */
+/* { dg-options "-O2" } */
+
+typedef void *ira_loop_tree_node_t;
+
+extern int end (int);
+extern int doo (int);
+
+void
+ira_traverse_loop_tree (int bb_p, ira_loop_tree_node_t loop_node,
+ void (*preorder_func) (ira_loop_tree_node_t),
+ void (*postorder_func) (ira_loop_tree_node_t))
+{
+ int l, r = 0x1, h = 0, j = 0;
+
+ if (preorder_func)
+ (*preorder_func) (loop_node);
+
+ if (bb_p)
+ {
+ for (l = 0; l < end (l); l++)
+ {
+ r += doo (l);
+ h += (l + 1) * 3;
+ h %= (l + 1);
+ r -= doo (h);
+ j += (l + 1) * 7;
+ j %= (l + 1);
+ r += doo (j);
+ }
+ }
+
+ if (postorder_func != NULL)
+ (*postorder_func) (loop_node);
+}
+/* { dg-final { scan-assembler "jmp[ \t]*.%eax" } } */
Hello, recent fallout about sibcall was caused by using 'm' constraint for sibcalls. By this wrongly combines happened on reload-pass. ChangeLog 2014-05-31 Kai Tietz <ktietz@redhat.com> * constrains.md (define_constrain): New 'B' constraint. * i386.md (sibcall_insn_operand): Use B instead of m constraint. ChangeLog testsuite 2014-05-31 Kai Tietz <ktietz@redhat.com> * gcc.target/i386/sibcall-6.c: New test. Bootstrapped i386-unknown-linux-gnu, x86_64-unknown-linux-gnu. Ok for apply? Regards, Kai