gcc/

	* config/aarch64/aarch64.md (subsi3, *subsi3_uxtw, subdi3)
	(*sub_<optab><ALLX:mode>_<GPI:mode>, *sub_<optab><SHORT:mode>_si_uxtw)
	(*sub_<optab><ALLX:mode>_shft_<GPI:mode>)
	(*sub_<optab><SHORT:mode>_shft_si_uxtw, *sub_<optab><mode>_multp2)
	(*sub_<optab>si_multp2_uxtw, *sub_uxt<mode>_multp2)
	(*sub_uxtsi_multp2_uxtw): Add stack pointer sources.

gcc/testsuite/
	* gcc.target/aarch64/subsp.c: New test.

From-SVN: r219533

gcc/ChangeLog

+2015-01-13  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* config/aarch64/aarch64.md (subsi3, *subsi3_uxtw, subdi3)
+	(*sub_<optab><ALLX:mode>_<GPI:mode>, *sub_<optab><SHORT:mode>_si_uxtw)
+	(*sub_<optab><ALLX:mode>_shft_<GPI:mode>)
+	(*sub_<optab><SHORT:mode>_shft_si_uxtw, *sub_<optab><mode>_multp2)
+	(*sub_<optab>si_multp2_uxtw, *sub_uxt<mode>_multp2)
+	(*sub_uxtsi_multp2_uxtw): Add stack pointer sources.
+
 2015-01-13  Andrew Pinski   <apinski@cavium.com>
 
 	* config/aarch64/aarch64.c (fusion_load_store): Check dest mode

gcc/config/aarch64/aarch64.md

@@ -1889,7 +1889,7 @@
 
 (define_insn "subsi3"
   [(set (match_operand:SI 0 "register_operand" "=rk")
-	(minus:SI (match_operand:SI 1 "register_operand" "r")
+	(minus:SI (match_operand:SI 1 "register_operand" "rk")
 		  (match_operand:SI 2 "register_operand" "r")))]
   ""
   "sub\\t%w0, %w1, %w2"
@@ -1900,7 +1900,7 @@
 (define_insn "*subsi3_uxtw"
   [(set (match_operand:DI 0 "register_operand" "=rk")
 	(zero_extend:DI
-         (minus:SI (match_operand:SI 1 "register_operand" "r")
+         (minus:SI (match_operand:SI 1 "register_operand" "rk")
 		   (match_operand:SI 2 "register_operand" "r"))))]
   ""
   "sub\\t%w0, %w1, %w2"
@@ -1909,7 +1909,7 @@
 
 (define_insn "subdi3"
   [(set (match_operand:DI 0 "register_operand" "=rk,w")
-	(minus:DI (match_operand:DI 1 "register_operand" "r,w")
+	(minus:DI (match_operand:DI 1 "register_operand" "rk,w")
 		  (match_operand:DI 2 "register_operand" "r,w")))]
   ""
   "@
@@ -2013,7 +2013,7 @@
 
 (define_insn "*sub_<optab><ALLX:mode>_<GPI:mode>"
   [(set (match_operand:GPI 0 "register_operand" "=rk")
-	(minus:GPI (match_operand:GPI 1 "register_operand" "r")
+	(minus:GPI (match_operand:GPI 1 "register_operand" "rk")
 		   (ANY_EXTEND:GPI
 		    (match_operand:ALLX 2 "register_operand" "r"))))]
   ""
@@ -2025,7 +2025,7 @@
 (define_insn "*sub_<optab><SHORT:mode>_si_uxtw"
   [(set (match_operand:DI 0 "register_operand" "=rk")
 	(zero_extend:DI
-         (minus:SI (match_operand:SI 1 "register_operand" "r")
+         (minus:SI (match_operand:SI 1 "register_operand" "rk")
 		   (ANY_EXTEND:SI
 		    (match_operand:SHORT 2 "register_operand" "r")))))]
   ""
@@ -2035,7 +2035,7 @@
 
 (define_insn "*sub_<optab><ALLX:mode>_shft_<GPI:mode>"
   [(set (match_operand:GPI 0 "register_operand" "=rk")
-	(minus:GPI (match_operand:GPI 1 "register_operand" "r")
+	(minus:GPI (match_operand:GPI 1 "register_operand" "rk")
 		   (ashift:GPI (ANY_EXTEND:GPI
 				(match_operand:ALLX 2 "register_operand" "r"))
 			       (match_operand 3 "aarch64_imm3" "Ui3"))))]
@@ -2048,7 +2048,7 @@
 (define_insn "*sub_<optab><SHORT:mode>_shft_si_uxtw"
   [(set (match_operand:DI 0 "register_operand" "=rk")
 	(zero_extend:DI
-         (minus:SI (match_operand:SI 1 "register_operand" "r")
+         (minus:SI (match_operand:SI 1 "register_operand" "rk")
 		   (ashift:SI (ANY_EXTEND:SI
 			       (match_operand:SHORT 2 "register_operand" "r"))
 			      (match_operand 3 "aarch64_imm3" "Ui3")))))]
@@ -2059,7 +2059,7 @@
 
 (define_insn "*sub_<optab><mode>_multp2"
   [(set (match_operand:GPI 0 "register_operand" "=rk")
-	(minus:GPI (match_operand:GPI 4 "register_operand" "r")
+	(minus:GPI (match_operand:GPI 4 "register_operand" "rk")
 		   (ANY_EXTRACT:GPI
 		    (mult:GPI (match_operand:GPI 1 "register_operand" "r")
 			      (match_operand 2 "aarch64_pwr_imm3" "Up3"))
@@ -2074,7 +2074,7 @@
 (define_insn "*sub_<optab>si_multp2_uxtw"
   [(set (match_operand:DI 0 "register_operand" "=rk")
 	(zero_extend:DI
-         (minus:SI (match_operand:SI 4 "register_operand" "r")
+         (minus:SI (match_operand:SI 4 "register_operand" "rk")
 		   (ANY_EXTRACT:SI
 		    (mult:SI (match_operand:SI 1 "register_operand" "r")
 			     (match_operand 2 "aarch64_pwr_imm3" "Up3"))
@@ -2113,7 +2113,7 @@
 
 (define_insn "*sub_uxt<mode>_multp2"
   [(set (match_operand:GPI 0 "register_operand" "=rk")
-	(minus:GPI (match_operand:GPI 4 "register_operand" "r")
+	(minus:GPI (match_operand:GPI 4 "register_operand" "rk")
 		   (and:GPI
 		    (mult:GPI (match_operand:GPI 1 "register_operand" "r")
 			      (match_operand 2 "aarch64_pwr_imm3" "Up3"))
@@ -2130,7 +2130,7 @@
 (define_insn "*sub_uxtsi_multp2_uxtw"
   [(set (match_operand:DI 0 "register_operand" "=rk")
 	(zero_extend:DI
-         (minus:SI (match_operand:SI 4 "register_operand" "r")
+         (minus:SI (match_operand:SI 4 "register_operand" "rk")
 		   (and:SI
 		    (mult:SI (match_operand:SI 1 "register_operand" "r")
 			     (match_operand 2 "aarch64_pwr_imm3" "Up3"))

gcc/testsuite/ChangeLog

+2015-01-13  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* gcc.target/aarch64/subsp.c: New test.
+
 2015-01-13  Andrew Pinski  <apinski@cavium.com>
 
 	* gcc.target/aarch64/store-pair-1.c: New testcase.

gcc/testsuite/gcc.target/aarch64/subsp.c

+/* { dg-options "-O" } */
+
+int foo (void *);
+
+int
+f1 (int *x, long y)
+{
+  return foo (__builtin_alloca (y));
+}
+
+int
+f2 (int *x, int y)
+{
+  char a[y + 1][16];
+  return foo (a);
+}
+
+/* { dg-final { scan-assembler "sub\tsp, sp, x\[0-9\]*\n" } } */
+/* { dg-final { scan-assembler "sub\tsp, sp, x\[0-9\]*, sxtw 4\n" } } */