[arm][2/2] Remove support for -march=armv3 and older

We deprecated architecture versions earlier than Armv4T in GCC 6 [1].
This patch removes support for architectures lower than Armv4.
That is the -march values armv2, armv2a, armv3, armv3m are removed
with this patch.  I did not remove armv4 because it's a bit more
involved code-wise and there has been some pushback on the implications
for -mcpu=strongarm support.

Removing armv3m and earlier though is pretty straightforward.
This allows us to get rid of the armv3m and mode32 feature bits
in arm-cpus.in as they can be assumed to be universally available.

Consequently the mcpu values arm2, arm250, arm3, arm6, arm60, arm600, arm610, arm620, arm7, arm7d, arm7di, arm70, arm700, arm700i, arm710, arm720, arm710c, arm7100, arm7500, arm7500fe, arm7m, arm7dm, arm7dm are now also removed.

Bootstrapped and tested on arm-none-linux-gnueabihf and on arm-none-eabi
with an aprofile multilib configuration (which builds quite a lot of library
configurations).

[1] https://gcc.gnu.org/gcc-6/changes.html#arm 

	* config/arm/arm-cpus.in (armv3m, mode32): Delete features.
	(ARMv4): Update.
	(ARMv2, ARMv3, ARMv3m): Delete fgroups.
	(ARMv6m): Update.
	(armv2, armv2a, armv3, armv3m): Delete architectures.
	(arm2, arm250, arm3, arm6, arm60, arm600, arm610, arm620,
	arm7, arm7d, arm7di, arm70, arm700, arm700i, arm710, arm720,
	arm710c, arm7100, arm7500, arm7500fe, arm7m, arm7dm, arm7dmi):
	Delete cpus.
	* config/arm/arm.md (maddsidi4): Remove check for arm_arch3m.
	(*mulsidi3adddi): Likewise.
	(mulsidi3): Likewise.
	(*mulsidi3_nov6): Likewise.
	(umulsidi3): Likewise.
	(umulsidi3_nov6): Likewise.
	(umaddsidi4): Likewise.
	(*umulsidi3adddi): Likewise.
	(smulsi3_highpart): Likewise.
	(*smulsi3_highpart_nov6): Likewise.
	(umulsi3_highpart): Likewise.
	(*umulsi3_highpart_nov6): Likewise.
	* config/arm/arm.h (arm_arch3m): Delete.
	* config/arm/arm.c (arm_arch3m): Delete.
	(arm_option_override_internal): Update armv3-related comment.
	(arm_configure_build_target): Delete use of isa_bit_mode32.
	(arm_option_reconfigure_globals): Delete set of arm_ach3m.
	(arm_rtx_costs_internal): Delete check of arm_arch3m.
	* config/arm/arm-fixed.md (mulsq3): Delete check for arm_arch3m.
	(mulsa3): Likewise.
	(mulusa3): Likewise.
	* config/arm/arm-protos.h (arm_arch3m): Delete.
	* config/arm/arm-tables.opt: Regenerate.
	* config/arm/arm-tune.md: Likewise.
	* config/arm/t-arm-elf (all_early_nofp): Delete mentions of
	deleted architectures.

	* gcc.target/arm/pr62554.c: Delete.
	* gcc.target/arm/pr69610-1.c: Likewise.
	* gcc.target/arm/pr69610-2.c: Likewise.

From-SVN: r260363

9 files changed, 85 insertions, 371 deletions

diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
index 0a31887..16a381c 100644
--- a/gcc/config/arm/arm-cpus.in
+++ b/gcc/config/arm/arm-cpus.in
@@ -48,15 +48,9 @@
 
 # Features - general convention: all lower case.
 
-# Extended multiply
-define feature armv3m
-
 # 26-bit mode support
 define feature mode26
 
-# 32-bit mode support
-define feature mode32
-
 # Architecture rel 4
 define feature armv4
 
@@ -215,10 +209,7 @@ define fgroup ALL_FPU_INTERNAL	vfpv2 vfpv3 vfpv4 fpv5 fp16conv fp_dbl ALL_SIMD_I
 # -mfpu support.
 define fgroup ALL_FP	fp16 ALL_FPU_INTERNAL
 
-define fgroup ARMv2       notm
-define fgroup ARMv3       ARMv2 mode32
-define fgroup ARMv3m      ARMv3 armv3m
-define fgroup ARMv4       ARMv3m armv4
+define fgroup ARMv4       armv4 notm
 define fgroup ARMv4t      ARMv4 thumb
 define fgroup ARMv5t      ARMv4t armv5t
 define fgroup ARMv5te     ARMv5t armv5te
@@ -232,7 +223,7 @@ define fgroup ARMv6zk     ARMv6k
 define fgroup ARMv6t2     ARMv6 thumb2
 # This is suspect.  ARMv6-m doesn't really pull in any useful features
 # from ARMv5* or ARMv6.
-define fgroup ARMv6m      mode32 armv3m armv4 thumb armv5t armv5te armv6 be8
+define fgroup ARMv6m      armv4 thumb armv5t armv5te armv6 be8
 # This is suspect, the 'common' ARMv7 subset excludes the thumb2 'DSP' and
 # integer SIMD instructions that are in ARMv6T2.  */
 define fgroup ARMv7       ARMv6m thumb2 armv7
@@ -279,34 +270,6 @@ define fgroup ALL_QUIRKS   quirk_no_volatile_ce quirk_armv6kz quirk_cm3_ldrd
 # end arch <name>
 #
 
-begin arch armv2
- tune for arm2
- tune flags CO_PROC NO_MODE32
- base 2
- isa ARMv2 mode26
-end arch armv2
-
-begin arch armv2a
- tune for arm2
- tune flags CO_PROC NO_MODE32
- base 2
- isa ARMv2 mode26
-end arch armv2a
-
-begin arch armv3
- tune for arm6
- tune flags CO_PROC
- base 3
- isa ARMv3 mode26
-end arch armv3
-
-begin arch armv3m
- tune for arm7m
- tune flags CO_PROC
- base 3M
- isa ARMv3m mode26
-end arch armv3m
-
 begin arch armv4
  tune for arm7tdmi
  tune flags CO_PROC
@@ -675,154 +638,6 @@ end arch iwmmxt2
 # option must similarly have a distinct feature set.  Option aliases can be
 # added with the optalias statement
 
-# V2/V2A Architecture Processors
-begin cpu arm2
- tune flags CO_PROC NO_MODE32
- architecture armv2
- costs slowmul
-end cpu arm2
-
-begin cpu arm250
- tune flags CO_PROC NO_MODE32
- architecture armv2
- costs slowmul
-end cpu arm250
-
-begin cpu arm3
- tune flags CO_PROC NO_MODE32
- architecture armv2
- costs slowmul
-end cpu arm3
-
-
-# V3 Architecture Processors
-begin cpu arm6
- tune flags CO_PROC
- architecture armv3
- costs slowmul
-end cpu arm6
-
-begin cpu arm60
- tune flags CO_PROC
- architecture armv3
- costs slowmul
-end cpu arm60
-
-begin cpu arm600
- tune flags CO_PROC WBUF
- architecture armv3
- costs slowmul
-end cpu arm600
-
-begin cpu arm610
- tune flags WBUF
- architecture armv3
- costs slowmul
-end cpu arm610
-
-begin cpu arm620
- tune flags CO_PROC WBUF
- architecture armv3
- costs slowmul
-end cpu arm620
-
-begin cpu arm7
- tune flags CO_PROC
- architecture armv3
- costs slowmul
-end cpu arm7
-
-begin cpu arm7d
- tune flags CO_PROC
- architecture armv3
- costs slowmul
-end cpu arm7d
-
-begin cpu arm7di
- tune flags CO_PROC
- architecture armv3
- costs slowmul
-end cpu arm7di
-
-begin cpu arm70
- tune flags CO_PROC
- architecture armv3
- costs slowmul
-end cpu arm70
-
-begin cpu arm700
- tune flags CO_PROC WBUF
- architecture armv3
- costs slowmul
-end cpu arm700
-
-begin cpu arm700i
- tune flags CO_PROC WBUF
- architecture armv3
- costs slowmul
-end cpu arm700i
-
-begin cpu arm710
- tune flags WBUF
- architecture armv3
- costs slowmul
-end cpu arm710
-
-begin cpu arm720
- tune flags WBUF
- architecture armv3
- costs slowmul
-end cpu arm720
-
-begin cpu arm710c
- tune flags WBUF
- architecture armv3
- costs slowmul
-end cpu arm710c
-
-begin cpu arm7100
- tune flags WBUF
- architecture armv3
- costs slowmul
-end cpu arm7100
-
-begin cpu arm7500
- tune flags WBUF
- architecture armv3
- costs slowmul
-end cpu arm7500
-
-# Doesn't have an external co-proc, but does have embedded FPA
-# (the FPA part is no-longer supported).
-begin cpu arm7500fe
- tune flags CO_PROC WBUF
- architecture armv3
- costs slowmul
-end cpu arm7500fe
-
-
-# V3M Architecture Processors
-# arm7m doesn't exist on its own, but only with "D", (and "I"), but
-# those don't alter the code, so arm7m is sometimes used.
-begin cpu arm7m
- tune flags CO_PROC
- architecture armv3m
- costs fastmul
-end cpu arm7m
-
-begin cpu arm7dm
- tune flags CO_PROC
- architecture armv3m
- costs fastmul
-end cpu arm7dm
-
-begin cpu arm7dmi
- tune flags CO_PROC
- architecture armv3m
- costs fastmul
-end cpu arm7dmi
-
-
 # V4 Architecture Processors
 begin cpu arm8
  tune flags LDSCHED
diff --git a/gcc/config/arm/arm-fixed.md b/gcc/config/arm/arm-fixed.md
index b1451e0..18a564b 100644
--- a/gcc/config/arm/arm-fixed.md
+++ b/gcc/config/arm/arm-fixed.md
@@ -137,7 +137,7 @@
   [(set (match_operand:SQ 0 "s_register_operand" "")
 	(mult:SQ (match_operand:SQ 1 "s_register_operand" "")
 		 (match_operand:SQ 2 "s_register_operand" "")))]
-  "TARGET_32BIT && arm_arch3m"
+  "TARGET_32BIT"
 {
   rtx tmp1 = gen_reg_rtx (DImode);
   rtx tmp2 = gen_reg_rtx (SImode);
@@ -159,7 +159,7 @@
   [(set (match_operand:SA 0 "s_register_operand" "")
 	(mult:SA (match_operand:SA 1 "s_register_operand" "")
 		 (match_operand:SA 2 "s_register_operand" "")))]
-  "TARGET_32BIT && arm_arch3m"
+  "TARGET_32BIT"
 {
   rtx tmp1 = gen_reg_rtx (DImode);
   rtx tmp2 = gen_reg_rtx (SImode);
@@ -178,7 +178,7 @@
   [(set (match_operand:USA 0 "s_register_operand" "")
 	(mult:USA (match_operand:USA 1 "s_register_operand" "")
 		  (match_operand:USA 2 "s_register_operand" "")))]
-  "TARGET_32BIT && arm_arch3m"
+  "TARGET_32BIT"
 {
   rtx tmp1 = gen_reg_rtx (DImode);
   rtx tmp2 = gen_reg_rtx (SImode);
diff --git a/gcc/config/arm/arm-protos.h b/gcc/config/arm/arm-protos.h
index ea2cf69..8537262 100644
--- a/gcc/config/arm/arm-protos.h
+++ b/gcc/config/arm/arm-protos.h
@@ -379,9 +379,6 @@ extern bool arm_is_constant_pool_ref (rtx);
    be used.  */
 extern unsigned int tune_flags;
 
-/* Nonzero if this chip supports the ARM Architecture 3M extensions.  */
-extern int arm_arch3m;
-
 /* Nonzero if this chip supports the ARM Architecture 4 extensions.  */
 extern int arm_arch4;
 
diff --git a/gcc/config/arm/arm-tables.opt b/gcc/config/arm/arm-tables.opt
index b05da64..0ffb4c8 100644
--- a/gcc/config/arm/arm-tables.opt
+++ b/gcc/config/arm/arm-tables.opt
@@ -25,75 +25,6 @@ Name(processor_type) Type(enum processor_type)
 Known ARM CPUs (for use with the -mcpu= and -mtune= options):
 
 EnumValue
-Enum(processor_type) String(arm2) Value( TARGET_CPU_arm2)
-
-EnumValue
-Enum(processor_type) String(arm250) Value( TARGET_CPU_arm250)
-
-EnumValue
-Enum(processor_type) String(arm3) Value( TARGET_CPU_arm3)
-
-EnumValue
-Enum(processor_type) String(arm6) Value( TARGET_CPU_arm6)
-
-EnumValue
-Enum(processor_type) String(arm60) Value( TARGET_CPU_arm60)
-
-EnumValue
-Enum(processor_type) String(arm600) Value( TARGET_CPU_arm600)
-
-EnumValue
-Enum(processor_type) String(arm610) Value( TARGET_CPU_arm610)
-
-EnumValue
-Enum(processor_type) String(arm620) Value( TARGET_CPU_arm620)
-
-EnumValue
-Enum(processor_type) String(arm7) Value( TARGET_CPU_arm7)
-
-EnumValue
-Enum(processor_type) String(arm7d) Value( TARGET_CPU_arm7d)
-
-EnumValue
-Enum(processor_type) String(arm7di) Value( TARGET_CPU_arm7di)
-
-EnumValue
-Enum(processor_type) String(arm70) Value( TARGET_CPU_arm70)
-
-EnumValue
-Enum(processor_type) String(arm700) Value( TARGET_CPU_arm700)
-
-EnumValue
-Enum(processor_type) String(arm700i) Value( TARGET_CPU_arm700i)
-
-EnumValue
-Enum(processor_type) String(arm710) Value( TARGET_CPU_arm710)
-
-EnumValue
-Enum(processor_type) String(arm720) Value( TARGET_CPU_arm720)
-
-EnumValue
-Enum(processor_type) String(arm710c) Value( TARGET_CPU_arm710c)
-
-EnumValue
-Enum(processor_type) String(arm7100) Value( TARGET_CPU_arm7100)
-
-EnumValue
-Enum(processor_type) String(arm7500) Value( TARGET_CPU_arm7500)
-
-EnumValue
-Enum(processor_type) String(arm7500fe) Value( TARGET_CPU_arm7500fe)
-
-EnumValue
-Enum(processor_type) String(arm7m) Value( TARGET_CPU_arm7m)
-
-EnumValue
-Enum(processor_type) String(arm7dm) Value( TARGET_CPU_arm7dm)
-
-EnumValue
-Enum(processor_type) String(arm7dmi) Value( TARGET_CPU_arm7dmi)
-
-EnumValue
 Enum(processor_type) String(arm8) Value( TARGET_CPU_arm8)
 
 EnumValue
@@ -365,106 +296,94 @@ Name(arm_arch) Type(int)
 Known ARM architectures (for use with the -march= option):
 
 EnumValue
-Enum(arm_arch) String(armv2) Value(0)
-
-EnumValue
-Enum(arm_arch) String(armv2a) Value(1)
-
-EnumValue
-Enum(arm_arch) String(armv3) Value(2)
-
-EnumValue
-Enum(arm_arch) String(armv3m) Value(3)
-
-EnumValue
-Enum(arm_arch) String(armv4) Value(4)
+Enum(arm_arch) String(armv4) Value(0)
 
 EnumValue
-Enum(arm_arch) String(armv4t) Value(5)
+Enum(arm_arch) String(armv4t) Value(1)
 
 EnumValue
-Enum(arm_arch) String(armv5t) Value(6)
+Enum(arm_arch) String(armv5t) Value(2)
 
 EnumValue
-Enum(arm_arch) String(armv5te) Value(7)
+Enum(arm_arch) String(armv5te) Value(3)
 
 EnumValue
-Enum(arm_arch) String(armv5tej) Value(8)
+Enum(arm_arch) String(armv5tej) Value(4)
 
 EnumValue
-Enum(arm_arch) String(armv6) Value(9)
+Enum(arm_arch) String(armv6) Value(5)
 
 EnumValue
-Enum(arm_arch) String(armv6j) Value(10)
+Enum(arm_arch) String(armv6j) Value(6)
 
 EnumValue
-Enum(arm_arch) String(armv6k) Value(11)
+Enum(arm_arch) String(armv6k) Value(7)
 
 EnumValue
-Enum(arm_arch) String(armv6z) Value(12)
+Enum(arm_arch) String(armv6z) Value(8)
 
 EnumValue
-Enum(arm_arch) String(armv6kz) Value(13)
+Enum(arm_arch) String(armv6kz) Value(9)
 
 EnumValue
-Enum(arm_arch) String(armv6zk) Value(14)
+Enum(arm_arch) String(armv6zk) Value(10)
 
 EnumValue
-Enum(arm_arch) String(armv6t2) Value(15)
+Enum(arm_arch) String(armv6t2) Value(11)
 
 EnumValue
-Enum(arm_arch) String(armv6-m) Value(16)
+Enum(arm_arch) String(armv6-m) Value(12)
 
 EnumValue
-Enum(arm_arch) String(armv6s-m) Value(17)
+Enum(arm_arch) String(armv6s-m) Value(13)
 
 EnumValue
-Enum(arm_arch) String(armv7) Value(18)
+Enum(arm_arch) String(armv7) Value(14)
 
 EnumValue
-Enum(arm_arch) String(armv7-a) Value(19)
+Enum(arm_arch) String(armv7-a) Value(15)
 
 EnumValue
-Enum(arm_arch) String(armv7ve) Value(20)
+Enum(arm_arch) String(armv7ve) Value(16)
 
 EnumValue
-Enum(arm_arch) String(armv7-r) Value(21)
+Enum(arm_arch) String(armv7-r) Value(17)
 
 EnumValue
-Enum(arm_arch) String(armv7-m) Value(22)
+Enum(arm_arch) String(armv7-m) Value(18)
 
 EnumValue
-Enum(arm_arch) String(armv7e-m) Value(23)
+Enum(arm_arch) String(armv7e-m) Value(19)
 
 EnumValue
-Enum(arm_arch) String(armv8-a) Value(24)
+Enum(arm_arch) String(armv8-a) Value(20)
 
 EnumValue
-Enum(arm_arch) String(armv8.1-a) Value(25)
+Enum(arm_arch) String(armv8.1-a) Value(21)
 
 EnumValue
-Enum(arm_arch) String(armv8.2-a) Value(26)
+Enum(arm_arch) String(armv8.2-a) Value(22)
 
 EnumValue
-Enum(arm_arch) String(armv8.3-a) Value(27)
+Enum(arm_arch) String(armv8.3-a) Value(23)
 
 EnumValue
-Enum(arm_arch) String(armv8.4-a) Value(28)
+Enum(arm_arch) String(armv8.4-a) Value(24)
 
 EnumValue
-Enum(arm_arch) String(armv8-m.base) Value(29)
+Enum(arm_arch) String(armv8-m.base) Value(25)
 
 EnumValue
-Enum(arm_arch) String(armv8-m.main) Value(30)
+Enum(arm_arch) String(armv8-m.main) Value(26)
 
 EnumValue
-Enum(arm_arch) String(armv8-r) Value(31)
+Enum(arm_arch) String(armv8-r) Value(27)
 
 EnumValue
-Enum(arm_arch) String(iwmmxt) Value(32)
+Enum(arm_arch) String(iwmmxt) Value(28)
 
 EnumValue
-Enum(arm_arch) String(iwmmxt2) Value(33)
+Enum(arm_arch) String(iwmmxt2) Value(29)
 
 Enum
 Name(arm_fpu) Type(enum fpu_type)
diff --git a/gcc/config/arm/arm-tune.md b/gcc/config/arm/arm-tune.md
index df43a1c..877e346 100644
--- a/gcc/config/arm/arm-tune.md
+++ b/gcc/config/arm/arm-tune.md
@@ -21,42 +21,34 @@
 ; <http://www.gnu.org/licenses/>.
 
 (define_attr "tune"
-	"arm2,arm250,arm3,
-	arm6,arm60,arm600,
-	arm610,arm620,arm7,
-	arm7d,arm7di,arm70,
-	arm700,arm700i,arm710,
-	arm720,arm710c,arm7100,
-	arm7500,arm7500fe,arm7m,
-	arm7dm,arm7dmi,arm8,
-	arm810,strongarm,strongarm110,
-	strongarm1100,strongarm1110,fa526,
-	fa626,arm7tdmi,arm7tdmis,
-	arm710t,arm720t,arm740t,
-	arm9,arm9tdmi,arm920,
-	arm920t,arm922t,arm940t,
-	ep9312,arm10tdmi,arm1020t,
-	arm9e,arm946es,arm966es,
-	arm968es,arm10e,arm1020e,
-	arm1022e,xscale,iwmmxt,
-	iwmmxt2,fa606te,fa626te,
-	fmp626,fa726te,arm926ejs,
-	arm1026ejs,arm1136js,arm1136jfs,
-	arm1176jzs,arm1176jzfs,mpcorenovfp,
-	mpcore,arm1156t2s,arm1156t2fs,
-	cortexm1,cortexm0,cortexm0plus,
-	cortexm1smallmultiply,cortexm0smallmultiply,cortexm0plussmallmultiply,
-	genericv7a,cortexa5,cortexa7,
-	cortexa8,cortexa9,cortexa12,
-	cortexa15,cortexa17,cortexr4,
-	cortexr4f,cortexr5,cortexr7,
-	cortexr8,cortexm7,cortexm4,
-	cortexm3,marvell_pj4,cortexa15cortexa7,
-	cortexa17cortexa7,cortexa32,cortexa35,
-	cortexa53,cortexa57,cortexa72,
-	cortexa73,exynosm1,xgene1,
-	cortexa57cortexa53,cortexa72cortexa53,cortexa73cortexa35,
-	cortexa73cortexa53,cortexa55,cortexa75,
-	cortexa75cortexa55,cortexm23,cortexm33,
-	cortexr52"
+	"arm8,arm810,strongarm,
+	strongarm110,strongarm1100,strongarm1110,
+	fa526,fa626,arm7tdmi,
+	arm7tdmis,arm710t,arm720t,
+	arm740t,arm9,arm9tdmi,
+	arm920,arm920t,arm922t,
+	arm940t,ep9312,arm10tdmi,
+	arm1020t,arm9e,arm946es,
+	arm966es,arm968es,arm10e,
+	arm1020e,arm1022e,xscale,
+	iwmmxt,iwmmxt2,fa606te,
+	fa626te,fmp626,fa726te,
+	arm926ejs,arm1026ejs,arm1136js,
+	arm1136jfs,arm1176jzs,arm1176jzfs,
+	mpcorenovfp,mpcore,arm1156t2s,
+	arm1156t2fs,cortexm1,cortexm0,
+	cortexm0plus,cortexm1smallmultiply,cortexm0smallmultiply,
+	cortexm0plussmallmultiply,genericv7a,cortexa5,
+	cortexa7,cortexa8,cortexa9,
+	cortexa12,cortexa15,cortexa17,
+	cortexr4,cortexr4f,cortexr5,
+	cortexr7,cortexr8,cortexm7,
+	cortexm4,cortexm3,marvell_pj4,
+	cortexa15cortexa7,cortexa17cortexa7,cortexa32,
+	cortexa35,cortexa53,cortexa57,
+	cortexa72,cortexa73,exynosm1,
+	xgene1,cortexa57cortexa53,cortexa72cortexa53,
+	cortexa73cortexa35,cortexa73cortexa53,cortexa55,
+	cortexa75,cortexa75cortexa55,cortexm23,
+	cortexm33,cortexr52"
 	(const (symbol_ref "((enum attr_tune) arm_tune)")))
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 3bfc0d5..4a5da7e 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -850,9 +850,6 @@ struct arm_build_target arm_active_target;
 /* The following are used in the arm.md file as equivalents to bits
    in the above two flag variables.  */
 
-/* Nonzero if this chip supports the ARM Architecture 3M extensions.  */
-int arm_arch3m = 0;
-
 /* Nonzero if this chip supports the ARM Architecture 4 extensions.  */
 int arm_arch4 = 0;
 
@@ -3002,7 +2999,8 @@ arm_option_override_internal (struct gcc_options *opts,
   if (TARGET_INTERWORK && !bitmap_bit_p (arm_active_target.isa, isa_bit_thumb))
     {
       /* The default is to enable interworking, so this warning message would
-	 be confusing to users who have just compiled with, eg, -march=armv3.  */
+	 be confusing to users who have just compiled with
+	 eg, -march=armv4.  */
       /* warning (0, "ignoring -minterwork because target CPU does not support THUMB"); */
       opts->x_target_flags &= ~MASK_INTERWORK;
     }
@@ -3236,7 +3234,6 @@ arm_configure_build_target (struct arm_build_target *target,
       if (TARGET_INTERWORK || TARGET_THUMB)
 	{
 	  bitmap_set_bit (sought_isa, isa_bit_thumb);
-	  bitmap_set_bit (sought_isa, isa_bit_mode32);
 
 	  /* There are no ARM processors that support both APCS-26 and
 	     interworking.  Therefore we forcibly remove MODE26 from
@@ -3636,7 +3633,6 @@ arm_option_reconfigure_globals (void)
 
   /* Initialize boolean versions of the architectural flags, for use
      in the arm.md file.  */
-  arm_arch3m = bitmap_bit_p (arm_active_target.isa, isa_bit_armv3m);
   arm_arch4 = bitmap_bit_p (arm_active_target.isa, isa_bit_armv4);
   arm_arch4t = arm_arch4 && bitmap_bit_p (arm_active_target.isa, isa_bit_thumb);
   arm_arch5t =  bitmap_bit_p (arm_active_target.isa, isa_bit_armv5t);
@@ -10005,8 +10001,7 @@ arm_rtx_costs_internal (rtx x, enum rtx_code code, enum rtx_code outer_code,
 
       if (mode == DImode)
 	{
-	  if (arm_arch3m
-	      && GET_CODE (XEXP (x, 0)) == MULT
+	  if (GET_CODE (XEXP (x, 0)) == MULT
 	      && ((GET_CODE (XEXP (XEXP (x, 0), 0)) == ZERO_EXTEND
 		   && GET_CODE (XEXP (XEXP (x, 0), 1)) == ZERO_EXTEND)
 		  || (GET_CODE (XEXP (XEXP (x, 0), 0)) == SIGN_EXTEND
@@ -10204,11 +10199,10 @@ arm_rtx_costs_internal (rtx x, enum rtx_code code, enum rtx_code outer_code,
 
       if (mode == DImode)
 	{
-	  if (arm_arch3m
-	      && ((GET_CODE (XEXP (x, 0)) == ZERO_EXTEND
-		   && GET_CODE (XEXP (x, 1)) == ZERO_EXTEND)
-		  || (GET_CODE (XEXP (x, 0)) == SIGN_EXTEND
-		      && GET_CODE (XEXP (x, 1)) == SIGN_EXTEND)))
+	  if ((GET_CODE (XEXP (x, 0)) == ZERO_EXTEND
+		&& GET_CODE (XEXP (x, 1)) == ZERO_EXTEND)
+	       || (GET_CODE (XEXP (x, 0)) == SIGN_EXTEND
+		   && GET_CODE (XEXP (x, 1)) == SIGN_EXTEND))
 	    {
 	      if (speed_p)
 		*cost += extra_cost->mult[1].extend;
diff --git a/gcc/config/arm/arm.h b/gcc/config/arm/arm.h
index f3a6f7d..34894c0 100644
--- a/gcc/config/arm/arm.h
+++ b/gcc/config/arm/arm.h
@@ -399,9 +399,6 @@ enum base_architecture
 /* The major revision number of the ARM Architecture implemented by the target.  */
 extern enum base_architecture arm_base_arch;
 
-/* Nonzero if this chip supports the ARM Architecture 3M extensions.  */
-extern int arm_arch3m;
-
 /* Nonzero if this chip supports the ARM Architecture 4 extensions.  */
 extern int arm_arch4;
 
diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md
index 118cecf..361a026 100644
--- a/gcc/config/arm/arm.md
+++ b/gcc/config/arm/arm.md
@@ -1754,7 +1754,7 @@
 	  (sign_extend:DI (match_operand:SI 1 "s_register_operand" ""))
 	  (sign_extend:DI (match_operand:SI 2 "s_register_operand" "")))
 	 (match_operand:DI 3 "s_register_operand" "")))]
-  "TARGET_32BIT && arm_arch3m"
+  "TARGET_32BIT"
   "")
 
 (define_insn "*mulsidi3adddi"
@@ -1764,7 +1764,7 @@
 	  (sign_extend:DI (match_operand:SI 2 "s_register_operand" "%r"))
 	  (sign_extend:DI (match_operand:SI 3 "s_register_operand" "r")))
 	 (match_operand:DI 1 "s_register_operand" "0")))]
-  "TARGET_32BIT && arm_arch3m && !arm_arch6"
+  "TARGET_32BIT && !arm_arch6"
   "smlal%?\\t%Q0, %R0, %3, %2"
   [(set_attr "type" "smlal")
    (set_attr "predicable" "yes")]
@@ -1794,7 +1794,7 @@
 	(mult:DI
 	 (sign_extend:DI (match_operand:SI 1 "s_register_operand" ""))
 	 (sign_extend:DI (match_operand:SI 2 "s_register_operand" ""))))]
-  "TARGET_32BIT && arm_arch3m"
+  "TARGET_32BIT"
   ""
 )
 
@@ -1803,7 +1803,7 @@
 	(mult:DI
 	 (sign_extend:DI (match_operand:SI 1 "s_register_operand" "%r"))
 	 (sign_extend:DI (match_operand:SI 2 "s_register_operand" "r"))))]
-  "TARGET_32BIT && arm_arch3m && !arm_arch6"
+  "TARGET_32BIT && !arm_arch6"
   "smull%?\\t%Q0, %R0, %1, %2"
   [(set_attr "type" "smull")
    (set_attr "predicable" "yes")]
@@ -1825,7 +1825,7 @@
 	(mult:DI
 	 (zero_extend:DI (match_operand:SI 1 "s_register_operand" ""))
 	 (zero_extend:DI (match_operand:SI 2 "s_register_operand" ""))))]
-  "TARGET_32BIT && arm_arch3m"
+  "TARGET_32BIT"
   ""
 )
 
@@ -1834,7 +1834,7 @@
 	(mult:DI
 	 (zero_extend:DI (match_operand:SI 1 "s_register_operand" "%r"))
 	 (zero_extend:DI (match_operand:SI 2 "s_register_operand" "r"))))]
-  "TARGET_32BIT && arm_arch3m && !arm_arch6"
+  "TARGET_32BIT && !arm_arch6"
   "umull%?\\t%Q0, %R0, %1, %2"
   [(set_attr "type" "umull")
    (set_attr "predicable" "yes")]
@@ -1858,7 +1858,7 @@
 	  (zero_extend:DI (match_operand:SI 1 "s_register_operand" ""))
 	  (zero_extend:DI (match_operand:SI 2 "s_register_operand" "")))
 	 (match_operand:DI 3 "s_register_operand" "")))]
-  "TARGET_32BIT && arm_arch3m"
+  "TARGET_32BIT"
   "")
 
 (define_insn "*umulsidi3adddi"
@@ -1868,7 +1868,7 @@
 	  (zero_extend:DI (match_operand:SI 2 "s_register_operand" "%r"))
 	  (zero_extend:DI (match_operand:SI 3 "s_register_operand" "r")))
 	 (match_operand:DI 1 "s_register_operand" "0")))]
-  "TARGET_32BIT && arm_arch3m && !arm_arch6"
+  "TARGET_32BIT && !arm_arch6"
   "umlal%?\\t%Q0, %R0, %3, %2"
   [(set_attr "type" "umlal")
    (set_attr "predicable" "yes")]
@@ -1897,7 +1897,7 @@
 	     (sign_extend:DI (match_operand:SI 2 "s_register_operand" "")))
 	    (const_int 32))))
      (clobber (match_scratch:SI 3 ""))])]
-  "TARGET_32BIT && arm_arch3m"
+  "TARGET_32BIT"
   ""
 )
 
@@ -1910,7 +1910,7 @@
 	   (sign_extend:DI (match_operand:SI 2 "s_register_operand" "r,r")))
 	  (const_int 32))))
    (clobber (match_scratch:SI 3 "=&r,&r"))]
-  "TARGET_32BIT && arm_arch3m && !arm_arch6"
+  "TARGET_32BIT && !arm_arch6"
   "smull%?\\t%3, %0, %2, %1"
   [(set_attr "type" "smull")
    (set_attr "predicable" "yes")]
@@ -1941,7 +1941,7 @@
 	      (zero_extend:DI (match_operand:SI 2 "s_register_operand" "")))
 	    (const_int 32))))
      (clobber (match_scratch:SI 3 ""))])]
-  "TARGET_32BIT && arm_arch3m"
+  "TARGET_32BIT"
   ""
 )
 
@@ -1954,7 +1954,7 @@
 	   (zero_extend:DI (match_operand:SI 2 "s_register_operand" "r,r")))
 	  (const_int 32))))
    (clobber (match_scratch:SI 3 "=&r,&r"))]
-  "TARGET_32BIT && arm_arch3m && !arm_arch6"
+  "TARGET_32BIT && !arm_arch6"
   "umull%?\\t%3, %0, %2, %1"
   [(set_attr "type" "umull")
    (set_attr "predicable" "yes")]
diff --git a/gcc/config/arm/t-arm-elf b/gcc/config/arm/t-arm-elf
index aa36ff0..3506b16 100644
--- a/gcc/config/arm/t-arm-elf
+++ b/gcc/config/arm/t-arm-elf
@@ -39,7 +39,7 @@ v7ve_fps	:= vfpv3-d16 vfpv3 vfpv3-d16-fp16 vfpv3-fp16 vfpv4 neon \
 v8_fps		:= simd fp16 crypto fp16+crypto dotprod fp16fml
 
 # We don't do anything special with these.  Pre-v4t probably doesn't work.
-all_early_nofp	:= armv2 armv2a armv3 armv3m armv4 armv4t armv5t
+all_early_nofp	:= armv4 armv4t armv5t
 
 all_early_arch	:= armv5tej armv6 armv6j armv6k armv6z armv6kz \
 		   armv6zk armv6t2 iwmmxt iwmmxt2