arm-modes.def: Add new condition code mode CC_V to represent the overflow bit.

2016-08-24  Michael Collison <michael.collison@linaro.org>
	    Michael Collison <michael.collison@arm.com>

	* config/arm/arm-modes.def: Add new condition code mode CC_V
	to represent the overflow bit.
	* config/arm/arm.c (maybe_get_arm_condition_code):
	Add support for CC_Vmode.
	(arm_gen_unlikely_cbranch): New function to generate common
	rtl conditional branches for overflow patterns.
	* config/arm/arm-protos.h: Add prototype for
	arm_gen_unlikely_cbranch.
	* config/arm/arm.md (addv<mode>4, add<mode>3_compareV,
	addsi3_compareV_upper): New patterns to support signed
	builtin overflow add operations.
	(uaddv<mode>4, add<mode>3_compareC, addsi3_compareV_upper):
	New patterns to support unsigned builtin add overflow operations.
	(subv<mode>4, sub<mode>3_compare1): New patterns to support signed
	builtin overflow subtract operations,
	(usubv<mode>4): New patterns to support unsigned builtin subtract
	overflow operations.
	(negvsi3, negvdi3, negdi2_compare, negsi2_carryin_compare): New patterns
	to support builtin overflow negate operations.
	* gcc.target/arm/builtin_saddl.c: New testcase.
	* gcc.target/arm/builtin_saddll.c: New testcase.
	* gcc.target/arm/builtin_uaddl.c: New testcase.
	* gcc.target/arm/builtin_uaddll.c: New testcase.
	* gcc.target/arm/builtin_ssubl.c: New testcase.
	* gcc.target/arm/builtin_ssubll.c: New testcase.
	* gcc.target/arm/builtin_usubl.c: New testcase.
	* gcc.target/arm/builtin_usubll.c: New testcase.


Co-Authored-By: Michael Collison <michael.collison@arm.com>

From-SVN: r239739

14 files changed, 532 insertions, 0 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 66ec428..ef08c0a 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,26 @@
+2016-08-24  Michael Collison <michael.collison@linaro.org>
+	    Michael Collison <michael.collison@arm.com>
+
+	* config/arm/arm-modes.def: Add new condition code mode CC_V
+	to represent the overflow bit.
+	* config/arm/arm.c (maybe_get_arm_condition_code):
+	Add support for CC_Vmode.
+	(arm_gen_unlikely_cbranch): New function to generate common
+	rtl conditional branches for overflow patterns.
+	* config/arm/arm-protos.h: Add prototype for
+	arm_gen_unlikely_cbranch.
+	* config/arm/arm.md (addv<mode>4, add<mode>3_compareV,
+	addsi3_compareV_upper): New patterns to support signed
+	builtin overflow add operations.
+	(uaddv<mode>4, add<mode>3_compareC, addsi3_compareV_upper):
+	New patterns to support unsigned builtin add overflow operations.
+	(subv<mode>4, sub<mode>3_compare1): New patterns to support signed
+	builtin overflow subtract operations,
+	(usubv<mode>4): New patterns to support unsigned builtin subtract
+	overflow operations.
+	(negvsi3, negvdi3, negdi2_compare, negsi2_carryin_compare): New patterns
+	to support builtin overflow negate operations.
+
 2016-08-24  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
 
 	Revert
diff --git a/gcc/config/arm/arm-modes.def b/gcc/config/arm/arm-modes.def
index 1819553..69231f2 100644
--- a/gcc/config/arm/arm-modes.def
+++ b/gcc/config/arm/arm-modes.def
@@ -59,6 +59,7 @@ CC_MODE (CC_DGEU);
 CC_MODE (CC_DGTU);
 CC_MODE (CC_C);
 CC_MODE (CC_N);
+CC_MODE (CC_V);
 
 /* Vector modes.  */
 VECTOR_MODES (INT, 4);        /*            V4QI V2HI */
diff --git a/gcc/config/arm/arm-protos.h b/gcc/config/arm/arm-protos.h
index 3975612..374836c 100644
--- a/gcc/config/arm/arm-protos.h
+++ b/gcc/config/arm/arm-protos.h
@@ -54,6 +54,8 @@ extern rtx arm_simd_vect_par_cnst_half (machine_mode mode, bool high);
 extern bool arm_simd_check_vect_par_cnst_half_p (rtx op, machine_mode mode,
 						 bool high);
 #ifdef RTX_CODE
+extern void arm_gen_unlikely_cbranch (enum rtx_code, machine_mode cc_mode,
+				      rtx label_ref);
 extern bool arm_vector_mode_supported_p (machine_mode);
 extern bool arm_small_register_classes_for_mode_p (machine_mode);
 extern int arm_hard_regno_mode_ok (unsigned int, machine_mode);
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index c1d010c..c775807 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -22992,6 +22992,8 @@ maybe_get_arm_condition_code (rtx comparison)
 	{
 	case LTU: return ARM_CS;
 	case GEU: return ARM_CC;
+	case NE: return ARM_CS;
+	case EQ: return ARM_CC;
 	default: return ARM_NV;
 	}
 
@@ -23017,6 +23019,14 @@ maybe_get_arm_condition_code (rtx comparison)
 	default: return ARM_NV;
 	}
 
+    case CC_Vmode:
+      switch (comp_code)
+	{
+	case NE: return ARM_VS;
+	case EQ: return ARM_VC;
+	default: return ARM_NV;
+	}
+
     case CCmode:
       switch (comp_code)
 	{
@@ -30575,4 +30585,23 @@ arm_can_output_mi_thunk (const_tree, HOST_WIDE_INT, HOST_WIDE_INT vcall_offset,
   return true;
 }
 
+/* Generate RTL for a conditional branch with rtx comparison CODE in
+   mode CC_MODE. The destination of the unlikely conditional branch
+   is LABEL_REF.  */
+
+void
+arm_gen_unlikely_cbranch (enum rtx_code code, machine_mode cc_mode,
+			  rtx label_ref)
+{
+  rtx x;
+  x = gen_rtx_fmt_ee (code, VOIDmode,
+		      gen_rtx_REG (cc_mode, CC_REGNUM),
+		      const0_rtx);
+
+  x = gen_rtx_IF_THEN_ELSE (VOIDmode, x,
+			    gen_rtx_LABEL_REF (VOIDmode, label_ref),
+			    pc_rtx);
+  emit_unlikely_jump (gen_rtx_SET (pc_rtx, x));
+}
+
 #include "gt-arm.h"
diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md
index ec1a9ad..318db75 100644
--- a/gcc/config/arm/arm.md
+++ b/gcc/config/arm/arm.md
@@ -547,6 +547,32 @@
    (set_attr "type" "multiple")]
 )
 
+(define_expand "addv<mode>4"
+  [(match_operand:SIDI 0 "register_operand")
+   (match_operand:SIDI 1 "register_operand")
+   (match_operand:SIDI 2 "register_operand")
+   (match_operand 3 "")]
+  "TARGET_32BIT"
+{
+  emit_insn (gen_add<mode>3_compareV (operands[0], operands[1], operands[2]));
+  arm_gen_unlikely_cbranch (NE, CC_Vmode, operands[3]);
+
+  DONE;
+})
+
+(define_expand "uaddv<mode>4"
+  [(match_operand:SIDI 0 "register_operand")
+   (match_operand:SIDI 1 "register_operand")
+   (match_operand:SIDI 2 "register_operand")
+   (match_operand 3 "")]
+  "TARGET_32BIT"
+{
+  emit_insn (gen_add<mode>3_compareC (operands[0], operands[1], operands[2]));
+  arm_gen_unlikely_cbranch (NE, CC_Cmode, operands[3]);
+
+  DONE;
+})
+
 (define_expand "addsi3"
   [(set (match_operand:SI          0 "s_register_operand" "")
 	(plus:SI (match_operand:SI 1 "s_register_operand" "")
@@ -624,6 +650,165 @@
  ]
 )
 
+(define_insn_and_split "adddi3_compareV"
+  [(set (reg:CC_V CC_REGNUM)
+	(ne:CC_V
+	  (plus:TI
+	    (sign_extend:TI (match_operand:DI 1 "register_operand" "r"))
+	    (sign_extend:TI (match_operand:DI 2 "register_operand" "r")))
+	  (sign_extend:TI (plus:DI (match_dup 1) (match_dup 2)))))
+   (set (match_operand:DI 0 "register_operand" "=&r")
+	(plus:DI (match_dup 1) (match_dup 2)))]
+  "TARGET_32BIT"
+  "#"
+  "&& reload_completed"
+  [(parallel [(set (reg:CC_C CC_REGNUM)
+		   (compare:CC_C (plus:SI (match_dup 1) (match_dup 2))
+				 (match_dup 1)))
+	      (set (match_dup 0) (plus:SI (match_dup 1) (match_dup 2)))])
+   (parallel [(set (reg:CC_V CC_REGNUM)
+		   (ne:CC_V
+		    (plus:DI (plus:DI
+			      (sign_extend:DI (match_dup 4))
+			      (sign_extend:DI (match_dup 5)))
+			     (ltu:DI (reg:CC_C CC_REGNUM) (const_int 0)))
+		    (plus:DI (sign_extend:DI
+			      (plus:SI (match_dup 4) (match_dup 5)))
+			     (ltu:DI (reg:CC_C CC_REGNUM) (const_int 0)))))
+	     (set (match_dup 3) (plus:SI (plus:SI
+					  (match_dup 4) (match_dup 5))
+					 (ltu:SI (reg:CC_C CC_REGNUM)
+						 (const_int 0))))])]
+  "
+  {
+    operands[3] = gen_highpart (SImode, operands[0]);
+    operands[0] = gen_lowpart (SImode, operands[0]);
+    operands[4] = gen_highpart (SImode, operands[1]);
+    operands[1] = gen_lowpart (SImode, operands[1]);
+    operands[5] = gen_highpart (SImode, operands[2]);
+    operands[2] = gen_lowpart (SImode, operands[2]);
+  }"
+ [(set_attr "conds" "set")
+   (set_attr "length" "8")
+   (set_attr "type" "multiple")]
+)
+
+(define_insn "addsi3_compareV"
+  [(set (reg:CC_V CC_REGNUM)
+	(ne:CC_V
+	  (plus:DI
+	    (sign_extend:DI (match_operand:SI 1 "register_operand" "r"))
+	    (sign_extend:DI (match_operand:SI 2 "register_operand" "r")))
+	  (sign_extend:DI (plus:SI (match_dup 1) (match_dup 2)))))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(plus:SI (match_dup 1) (match_dup 2)))]
+  "TARGET_32BIT"
+  "adds%?\\t%0, %1, %2"
+  [(set_attr "conds" "set")
+   (set_attr "type" "alus_sreg")]
+)
+
+(define_insn "*addsi3_compareV_upper"
+  [(set (reg:CC_V CC_REGNUM)
+	(ne:CC_V
+	  (plus:DI
+	   (plus:DI
+	    (sign_extend:DI (match_operand:SI 1 "register_operand" "r"))
+	    (sign_extend:DI (match_operand:SI 2 "register_operand" "r")))
+	   (ltu:DI (reg:CC_C CC_REGNUM) (const_int 0)))
+	  (plus:DI (sign_extend:DI
+		    (plus:SI (match_dup 1) (match_dup 2)))
+		   (ltu:DI (reg:CC_C CC_REGNUM) (const_int 0)))))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(plus:SI
+	 (plus:SI (match_dup 1) (match_dup 2))
+	 (ltu:SI (reg:CC_C CC_REGNUM) (const_int 0))))]
+  "TARGET_32BIT"
+  "adcs%?\\t%0, %1, %2"
+  [(set_attr "conds" "set")
+   (set_attr "type" "adcs_reg")]
+)
+
+(define_insn_and_split "adddi3_compareC"
+  [(set (reg:CC_C CC_REGNUM)
+	(ne:CC_C
+	  (plus:TI
+	    (zero_extend:TI (match_operand:DI 1 "register_operand" "r"))
+	    (zero_extend:TI (match_operand:DI 2 "register_operand" "r")))
+	  (zero_extend:TI (plus:DI (match_dup 1) (match_dup 2)))))
+   (set (match_operand:DI 0 "register_operand" "=&r")
+	(plus:DI (match_dup 1) (match_dup 2)))]
+  "TARGET_32BIT"
+  "#"
+  "&& reload_completed"
+  [(parallel [(set (reg:CC_C CC_REGNUM)
+		   (compare:CC_C (plus:SI (match_dup 1) (match_dup 2))
+				 (match_dup 1)))
+	      (set (match_dup 0) (plus:SI (match_dup 1) (match_dup 2)))])
+   (parallel [(set (reg:CC_C CC_REGNUM)
+		   (ne:CC_C
+		    (plus:DI (plus:DI
+			      (zero_extend:DI (match_dup 4))
+			      (zero_extend:DI (match_dup 5)))
+			     (ltu:DI (reg:CC_C CC_REGNUM) (const_int 0)))
+		    (plus:DI (zero_extend:DI
+			      (plus:SI (match_dup 4) (match_dup 5)))
+			     (ltu:DI (reg:CC_C CC_REGNUM) (const_int 0)))))
+	     (set (match_dup 3) (plus:SI
+				 (plus:SI (match_dup 4) (match_dup 5))
+				 (ltu:SI (reg:CC_C CC_REGNUM)
+					 (const_int 0))))])]
+  "
+  {
+    operands[3] = gen_highpart (SImode, operands[0]);
+    operands[0] = gen_lowpart (SImode, operands[0]);
+    operands[4] = gen_highpart (SImode, operands[1]);
+    operands[5] = gen_highpart (SImode, operands[2]);
+    operands[1] = gen_lowpart (SImode, operands[1]);
+    operands[2] = gen_lowpart (SImode, operands[2]);
+  }"
+ [(set_attr "conds" "set")
+   (set_attr "length" "8")
+   (set_attr "type" "multiple")]
+)
+
+(define_insn "*addsi3_compareC_upper"
+  [(set (reg:CC_C CC_REGNUM)
+	(ne:CC_C
+	  (plus:DI
+	   (plus:DI
+	    (zero_extend:DI (match_operand:SI 1 "register_operand" "r"))
+	    (zero_extend:DI (match_operand:SI 2 "register_operand" "r")))
+	   (ltu:DI (reg:CC_C CC_REGNUM) (const_int 0)))
+	  (plus:DI (zero_extend:DI
+		    (plus:SI (match_dup 1) (match_dup 2)))
+		   (ltu:DI (reg:CC_C CC_REGNUM) (const_int 0)))))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(plus:SI
+	 (plus:SI (match_dup 1) (match_dup 2))
+	 (ltu:SI (reg:CC_C CC_REGNUM) (const_int 0))))]
+  "TARGET_32BIT"
+  "adcs%?\\t%0, %1, %2"
+  [(set_attr "conds" "set")
+   (set_attr "type" "adcs_reg")]
+)
+
+(define_insn "addsi3_compareC"
+   [(set (reg:CC_C CC_REGNUM)
+	 (ne:CC_C
+	  (plus:DI
+	   (zero_extend:DI (match_operand:SI 1 "register_operand" "r"))
+	   (zero_extend:DI (match_operand:SI 2 "register_operand" "r")))
+	  (zero_extend:DI
+	   (plus:SI (match_dup 1) (match_dup 2)))))
+    (set (match_operand:SI 0 "register_operand" "=r")
+	 (plus:SI (match_dup 1) (match_dup 2)))]
+  "TARGET_32BIT"
+  "adds%?\\t%0, %1, %2"
+  [(set_attr "conds" "set")
+   (set_attr "type" "alus_sreg")]
+)
+
 (define_insn "addsi3_compare0"
   [(set (reg:CC_NOOV CC_REGNUM)
 	(compare:CC_NOOV
@@ -873,6 +1058,75 @@
     (set_attr "type" "adcs_reg")]
 )
 
+(define_expand "subv<mode>4"
+  [(match_operand:SIDI 0 "register_operand")
+   (match_operand:SIDI 1 "register_operand")
+   (match_operand:SIDI 2 "register_operand")
+   (match_operand 3 "")]
+  "TARGET_32BIT"
+{
+  emit_insn (gen_sub<mode>3_compare1 (operands[0], operands[1], operands[2]));
+  arm_gen_unlikely_cbranch (NE, CC_Vmode, operands[3]);
+
+  DONE;
+})
+
+(define_expand "usubv<mode>4"
+  [(match_operand:SIDI 0 "register_operand")
+   (match_operand:SIDI 1 "register_operand")
+   (match_operand:SIDI 2 "register_operand")
+   (match_operand 3 "")]
+  "TARGET_32BIT"
+{
+  emit_insn (gen_sub<mode>3_compare1 (operands[0], operands[1], operands[2]));
+  arm_gen_unlikely_cbranch (LTU, CCmode, operands[3]);
+
+  DONE;
+})
+
+(define_insn_and_split "subdi3_compare1"
+  [(set (reg:CC CC_REGNUM)
+	(compare:CC
+	  (match_operand:DI 1 "register_operand" "r")
+	  (match_operand:DI 2 "register_operand" "r")))
+   (set (match_operand:DI 0 "register_operand" "=&r")
+	(minus:DI (match_dup 1) (match_dup 2)))]
+  "TARGET_32BIT"
+  "#"
+  "&& reload_completed"
+  [(parallel [(set (reg:CC CC_REGNUM)
+		   (compare:CC (match_dup 1) (match_dup 2)))
+	      (set (match_dup 0) (minus:SI (match_dup 1) (match_dup 2)))])
+   (parallel [(set (reg:CC CC_REGNUM)
+		   (compare:CC (match_dup 4) (match_dup 5)))
+	     (set (match_dup 3) (minus:SI (minus:SI (match_dup 4) (match_dup 5))
+			       (ltu:SI (reg:CC_C CC_REGNUM) (const_int 0))))])]
+  {
+    operands[3] = gen_highpart (SImode, operands[0]);
+    operands[0] = gen_lowpart (SImode, operands[0]);
+    operands[4] = gen_highpart (SImode, operands[1]);
+    operands[1] = gen_lowpart (SImode, operands[1]);
+    operands[5] = gen_highpart (SImode, operands[2]);
+    operands[2] = gen_lowpart (SImode, operands[2]);
+   }
+  [(set_attr "conds" "set")
+   (set_attr "length" "8")
+   (set_attr "type" "multiple")]
+)
+
+(define_insn "subsi3_compare1"
+  [(set (reg:CC CC_REGNUM)
+	(compare:CC
+	  (match_operand:SI 1 "register_operand" "r")
+	  (match_operand:SI 2 "register_operand" "r")))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(minus:SI (match_dup 1) (match_dup 2)))]
+  "TARGET_32BIT"
+  "subs%?\\t%0, %1, %2"
+  [(set_attr "conds" "set")
+   (set_attr "type" "alus_sreg")]
+)
+
 (define_insn "*subsi3_carryin"
   [(set (match_operand:SI 0 "s_register_operand" "=r,r")
         (minus:SI (minus:SI (match_operand:SI 1 "reg_or_int_operand" "r,I")
@@ -4360,6 +4614,63 @@
 
 ;; Unary arithmetic insns
 
+(define_expand "negvsi3"
+  [(match_operand:SI 0 "register_operand")
+   (match_operand:SI 1 "register_operand")
+   (match_operand 2 "")]
+  "TARGET_32BIT"
+{
+  emit_insn (gen_subsi3_compare (operands[0], const0_rtx, operands[1]));
+  arm_gen_unlikely_cbranch (NE, CC_Vmode, operands[2]);
+
+  DONE;
+})
+
+(define_expand "negvdi3"
+  [(match_operand:DI 0 "register_operand")
+   (match_operand:DI 1 "register_operand")
+   (match_operand 2 "")]
+  "TARGET_ARM"
+{
+  emit_insn (gen_negdi2_compare (operands[0], operands[1]));
+  arm_gen_unlikely_cbranch (NE, CC_Vmode, operands[2]);
+
+  DONE;
+})
+
+
+(define_insn_and_split "negdi2_compare"
+  [(set (reg:CC CC_REGNUM)
+	(compare:CC
+	  (const_int 0)
+	  (match_operand:DI 1 "register_operand" "0,r")))
+   (set (match_operand:DI 0 "register_operand" "=r,&r")
+	(minus:DI (const_int 0) (match_dup 1)))]
+  "TARGET_ARM"
+  "#"
+  "&& reload_completed"
+  [(parallel [(set (reg:CC CC_REGNUM)
+		   (compare:CC (const_int 0) (match_dup 1)))
+	      (set (match_dup 0) (minus:SI (const_int 0)
+					   (match_dup 1)))])
+   (parallel [(set (reg:CC CC_REGNUM)
+		   (compare:CC (const_int 0) (match_dup 3)))
+	     (set (match_dup 2)
+		  (minus:SI
+		   (minus:SI (const_int 0) (match_dup 3))
+		   (ltu:SI (reg:CC_C CC_REGNUM)
+			   (const_int 0))))])]
+  {
+    operands[2] = gen_highpart (SImode, operands[0]);
+    operands[0] = gen_lowpart (SImode, operands[0]);
+    operands[3] = gen_highpart (SImode, operands[1]);
+    operands[1] = gen_lowpart (SImode, operands[1]);
+  }
+  [(set_attr "conds" "set")
+   (set_attr "length" "8")
+   (set_attr "type" "multiple")]
+)
+
 (define_expand "negdi2"
  [(parallel
    [(set (match_operand:DI 0 "s_register_operand" "")
@@ -4400,6 +4711,20 @@
    (set_attr "type" "multiple")]
 )
 
+(define_insn "*negsi2_carryin_compare"
+  [(set (reg:CC CC_REGNUM)
+	(compare:CC (const_int 0)
+		    (match_operand:SI 1 "s_register_operand" "r")))
+   (set (match_operand:SI 0 "s_register_operand" "=r")
+	(minus:SI (minus:SI (const_int 0)
+			    (match_dup 1))
+		  (ltu:SI (reg:CC_C CC_REGNUM) (const_int 0))))]
+  "TARGET_ARM"
+  "rscs\\t%0, %1, #0"
+  [(set_attr "conds" "set")
+   (set_attr "type" "alus_imm")]
+)
+
 (define_expand "negsi2"
   [(set (match_operand:SI         0 "s_register_operand" "")
 	(neg:SI (match_operand:SI 1 "s_register_operand" "")))]
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 354e485..2393eb5 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,15 @@
+2016-08-24  Michael Collison <michael.collison@linaro.org>
+	    Michael Collison <michael.collison@arm.com>
+
+	* gcc.target/arm/builtin_saddl.c: New testcase.
+	* gcc.target/arm/builtin_saddll.c: New testcase.
+	* gcc.target/arm/builtin_uaddl.c: New testcase.
+	* gcc.target/arm/builtin_uaddll.c: New testcase.
+	* gcc.target/arm/builtin_ssubl.c: New testcase.
+	* gcc.target/arm/builtin_ssubll.c: New testcase.
+	* gcc.target/arm/builtin_usubl.c: New testcase.
+	* gcc.target/arm/builtin_usubll.c: New testcase.
+
 2016-08-24  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/77270
diff --git a/gcc/testsuite/gcc.target/arm/builtin_saddl.c b/gcc/testsuite/gcc.target/arm/builtin_saddl.c
new file mode 100644
index 0000000..af85594
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/builtin_saddl.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" }  */
+/* { dg-require-effective-target arm32 } */
+extern void overflow_handler ();
+
+long overflow_add (long x, long y)
+{
+  long r;
+
+  int ovr = __builtin_saddl_overflow (x, y, &r);
+  if (ovr)
+    overflow_handler ();
+
+  return r;
+}
+
+/* { dg-final { scan-assembler "adds" } } */
diff --git a/gcc/testsuite/gcc.target/arm/builtin_saddll.c b/gcc/testsuite/gcc.target/arm/builtin_saddll.c
new file mode 100644
index 0000000..62fe6ef
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/builtin_saddll.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" }  */
+/* { dg-require-effective-target arm32 } */
+extern void overflow_handler ();
+
+long long overflow_add (long long x, long long y)
+{
+  long long r;
+
+  int ovr = __builtin_saddll_overflow (x, y, &r);
+  if (ovr)
+    overflow_handler ();
+
+  return r;
+}
+
+/* { dg-final { scan-assembler "adds" } } */
+/* { dg-final { scan-assembler "adcs" } } */
diff --git a/gcc/testsuite/gcc.target/arm/builtin_ssubl.c b/gcc/testsuite/gcc.target/arm/builtin_ssubl.c
new file mode 100644
index 0000000..8c5a4c9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/builtin_ssubl.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" }  */
+/* { dg-require-effective-target arm32 } */
+extern void overflow_handler ();
+
+long overflow_sub (long x, long y)
+{
+  long r;
+
+  int ovr = __builtin_ssubl_overflow (x, y, &r);
+  if (ovr)
+    overflow_handler ();
+
+  return r;
+}
+
+/* { dg-final { scan-assembler "subs" } } */
diff --git a/gcc/testsuite/gcc.target/arm/builtin_ssubll.c b/gcc/testsuite/gcc.target/arm/builtin_ssubll.c
new file mode 100644
index 0000000..2048d79
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/builtin_ssubll.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" }  */
+/* { dg-require-effective-target arm32 } */
+extern void overflow_handler ();
+
+long long overflow_sub (long long x, long long y)
+{
+  long long r;
+
+  int ovr = __builtin_ssubll_overflow (x, y, &r);
+  if (ovr)
+    overflow_handler ();
+
+  return r;
+}
+
+/* { dg-final { scan-assembler "subs" } } */
+/* { dg-final { scan-assembler "sbcs" } } */
diff --git a/gcc/testsuite/gcc.target/arm/builtin_uaddl.c b/gcc/testsuite/gcc.target/arm/builtin_uaddl.c
new file mode 100644
index 0000000..ac25766
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/builtin_uaddl.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" }  */
+/* { dg-require-effective-target arm32 } */
+extern void overflow_handler ();
+
+unsigned long overflow_add (unsigned long x, unsigned long y)
+{
+  unsigned long r;
+
+  int ovr = __builtin_uaddl_overflow (x, y, &r);
+  if (ovr)
+    overflow_handler ();
+
+  return r;
+}
+
+/* { dg-final { scan-assembler "adds" } } */
diff --git a/gcc/testsuite/gcc.target/arm/builtin_uaddll.c b/gcc/testsuite/gcc.target/arm/builtin_uaddll.c
new file mode 100644
index 0000000..ec3188e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/builtin_uaddll.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" }  */
+/* { dg-require-effective-target arm32 } */
+extern void overflow_handler ();
+
+unsigned long long overflow_add (unsigned long long x, unsigned long long y)
+{
+  unsigned long long r;
+
+  int ovr = __builtin_uaddll_overflow (x, y, &r);
+  if (ovr)
+    overflow_handler ();
+
+  return r;
+}
+
+/* { dg-final { scan-assembler "adds" } } */
+/* { dg-final { scan-assembler "adcs" } } */
diff --git a/gcc/testsuite/gcc.target/arm/builtin_usubl.c b/gcc/testsuite/gcc.target/arm/builtin_usubl.c
new file mode 100644
index 0000000..9978208
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/builtin_usubl.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" }  */
+/* { dg-require-effective-target arm32 } */
+extern void overflow_handler ();
+
+unsigned long overflow_sub (unsigned long x, unsigned long y)
+{
+  unsigned long r;
+
+  int ovr = __builtin_usubl_overflow (x, y, &r);
+  if (ovr)
+    overflow_handler ();
+
+  return r;
+}
+
+/* { dg-final { scan-assembler "subs" } } */
diff --git a/gcc/testsuite/gcc.target/arm/builtin_usubll.c b/gcc/testsuite/gcc.target/arm/builtin_usubll.c
new file mode 100644
index 0000000..8d64660
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/builtin_usubll.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" }  */
+/* { dg-require-effective-target arm32 } */
+extern void overflow_handler ();
+
+unsigned long long overflow_sub (unsigned long long x, unsigned long long y)
+{
+  unsigned long long r;
+
+  int ovr = __builtin_usubll_overflow (x, y, &r);
+  if (ovr)
+    overflow_handler ();
+
+  return r;
+}
+
+/* { dg-final { scan-assembler "subs" } } */
+/* { dg-final { scan-assembler "sbcs" } } */