[ARM] Multilib mapping for Armv8-R

Due to there being no multilib mapping for Armv8-R, default multilib
builts for -march=armv4t with softfloat floating-point arithmetic is
being used. This patch maps it instead to the existing Armv7 multilibs.
Note that mapping for single-precision Armv8-R has been left out due to
there being no Arm implementation of that architecture variant.

2018-02-22  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * config/arm/t-multilib: Map Armv8-R to Armv7 multilibs.

    gcc/testsuite/
    * gcc.target/arm/multilib.exp: Add tests for Armv8-R multilib mappings.

From-SVN: r257904

gcc/ChangeLog

+2018-02-22  Thomas Preud'homme  <thomas.preudhomme@arm.com>
+
+	* config/arm/t-multilib: Map Armv8-R to Armv7 multilibs.
+
 2018-02-22  Martin Liska  <mliska@suse.cz>
 
 	PR driver/83193

gcc/config/arm/t-multilib

@@ -70,6 +70,7 @@ v8_a_simd_variants	:= $(call all_feat_combs, simd crypto)
 v8_1_a_simd_variants	:= $(call all_feat_combs, simd crypto)
 v8_2_a_simd_variants	:= $(call all_feat_combs, simd fp16 fp16fml crypto dotprod)
 v8_4_a_simd_variants	:= $(call all_feat_combs, simd fp16 crypto)
+v8_r_nosimd_variants	:= +crc
 
 ifneq (,$(HAS_APROFILE))
 include $(srcdir)/config/arm/t-aprofile
@@ -105,6 +106,14 @@ MULTILIB_MATCHES	+= march?armv7+fp=march?armv7-r+fp+idiv
 
 MULTILIB_MATCHES	+= $(foreach ARCH, $(all_early_arch), \
 			     march?armv5te+fp=march?$(ARCH)+fp)
+# Map v8-r down onto common v7 code.
+MULTILIB_MATCHES	+= march?armv7=march?armv8-r
+MULTILIB_MATCHES	+= $(foreach ARCH, $(v8_r_nosimd_variants), \
+			     march?armv7=march?armv8-r$(ARCH))
+MULTILIB_MATCHES	+= $(foreach ARCH,+simd +crypto, \
+			     march?armv7+fp=march?armv8-r$(ARCH) \
+			     march?armv7+fp=march?armv8-r+crc$(ARCH))
+
 
 ifeq (,$(HAS_APROFILE))
 # Map all v7-a

gcc/testsuite/ChangeLog

+2018-02-22  Thomas Preud'homme  <thomas.preudhomme@arm.com>
+
+	* gcc.target/arm/multilib.exp: Add tests for Armv8-R multilib mappings.
+
 2018-02-22  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/84493

gcc/testsuite/gcc.target/arm/multilib.exp

@@ -422,6 +422,7 @@ if {[multilib_config "rmprofile"] } {
 	{-mcpu=cortex-m23 -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.base/nofp"
 	{-mcpu=cortex-m33 -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.main/nofp"
 	{-mcpu=cortex-m7+nofp.dp -mfpu=auto -mfloat-abi=soft} "thumb/v7e-m/nofp"
+	{-mcpu=cortex-r52 -mfpu=auto -mfloat-abi=soft} "thumb/v7/nofp"
 	{-mcpu=cortex-m0 -mfpu=vfpv3xd -mfloat-abi=soft} "thumb/v6-m/nofp"
 	{-mcpu=cortex-m1 -mfpu=vfpv3xd -mfloat-abi=soft} "thumb/v6-m/nofp"
 	{-mcpu=cortex-m3 -mfpu=vfpv3xd -mfloat-abi=soft} "thumb/v7-m/nofp"
@@ -466,6 +467,7 @@ if {[multilib_config "rmprofile"] } {
 	{-mcpu=cortex-m7 -mfpu=auto -mfloat-abi=hard} "thumb/v7e-m+dp/hard"
 	{-mcpu=cortex-m33 -mfpu=auto -mfloat-abi=hard} "thumb/v8-m.main+fp/hard"
 	{-mcpu=cortex-m7+nofp.dp -mfpu=auto -mfloat-abi=hard} "thumb/v7e-m+fp/hard"
+	{-mcpu=cortex-r52 -mfpu=auto -mfloat-abi=hard} "thumb/v7+fp/hard"
 	{-mcpu=cortex-m4 -mfpu=vfpv3xd -mfloat-abi=hard} "thumb/v7e-m+fp/hard"
 	{-mcpu=cortex-m7 -mfpu=vfpv3xd -mfloat-abi=hard} "thumb/v7e-m+fp/hard"
 	{-mcpu=cortex-m33 -mfpu=vfpv3xd -mfloat-abi=hard} "thumb/v8-m.main+fp/hard"
@@ -494,6 +496,7 @@ if {[multilib_config "rmprofile"] } {
 	{-mcpu=cortex-m23 -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.base/nofp"
 	{-mcpu=cortex-m33 -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.main+fp/softfp"
 	{-mcpu=cortex-m7+nofp.dp -mfpu=auto -mfloat-abi=softfp} "thumb/v7e-m+fp/softfp"
+	{-mcpu=cortex-r52 -mfpu=auto -mfloat-abi=softfp} "thumb/v7+fp/softfp"
 	{-mcpu=cortex-m0 -mfpu=vfpv3xd -mfloat-abi=softfp} "thumb/v6-m/nofp"
 	{-mcpu=cortex-m1 -mfpu=vfpv3xd -mfloat-abi=softfp} "thumb/v6-m/nofp"
 	{-mcpu=cortex-m3 -mfpu=vfpv3xd -mfloat-abi=softfp} "thumb/v7-m/nofp"
@@ -545,6 +548,12 @@ if {[multilib_config "rmprofile"] } {
 	{-march=armv8-m.main+fp.dp -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.main/nofp"
 	{-march=armv8-m.main+fp+dsp -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.main/nofp"
 	{-march=armv8-m.main+fp.dp+dsp -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.main/nofp"
+	{-march=armv8-r -mfpu=auto -mfloat-abi=soft} "thumb/v7/nofp"
+	{-march=armv8-r+crc -mfpu=auto -mfloat-abi=soft} "thumb/v7/nofp"
+	{-march=armv8-r+simd -mfpu=auto -mfloat-abi=soft} "thumb/v7/nofp"
+	{-march=armv8-r+crc+simd -mfpu=auto -mfloat-abi=soft} "thumb/v7/nofp"
+	{-march=armv8-r+crypto -mfpu=auto -mfloat-abi=soft} "thumb/v7/nofp"
+	{-march=armv8-r+crc+crypto -mfpu=auto -mfloat-abi=soft} "thumb/v7/nofp"
 	{-march=armv6-m -mfpu=vfpv3xd -mfloat-abi=soft} "thumb/v6-m/nofp"
 	{-march=armv7-m -mfpu=vfpv3xd -mfloat-abi=soft} "thumb/v7-m/nofp"
 	{-march=armv7e-m -mfpu=vfpv3xd -mfloat-abi=soft} "thumb/v7e-m/nofp"
@@ -606,6 +615,10 @@ if {[multilib_config "rmprofile"] } {
 	{-march=armv8-m.main+fp.dp -mfpu=auto -mfloat-abi=hard} "thumb/v8-m.main+dp/hard"
 	{-march=armv8-m.main+fp+dsp -mfpu=auto -mfloat-abi=hard} "thumb/v8-m.main+fp/hard"
 	{-march=armv8-m.main+fp.dp+dsp -mfpu=auto -mfloat-abi=hard} "thumb/v8-m.main+dp/hard"
+	{-march=armv8-r+simd -mfpu=auto -mfloat-abi=hard} "thumb/v7+fp/hard"
+	{-march=armv8-r+crc+simd -mfpu=auto -mfloat-abi=hard} "thumb/v7+fp/hard"
+	{-march=armv8-r+crypto -mfpu=auto -mfloat-abi=hard} "thumb/v7+fp/hard"
+	{-march=armv8-r+crc+crypto -mfpu=auto -mfloat-abi=hard} "thumb/v7+fp/hard"
 	{-march=armv7e-m -mfpu=vfpv3xd -mfloat-abi=hard} "thumb/v7e-m+fp/hard"
 	{-march=armv8-m.main -mfpu=vfpv3xd -mfloat-abi=hard} "thumb/v8-m.main+fp/hard"
 	{-march=armv7e-m+fp -mfpu=vfpv3xd -mfloat-abi=hard} "thumb/v7e-m+fp/hard"
@@ -657,6 +670,12 @@ if {[multilib_config "rmprofile"] } {
 	{-march=armv8-m.main+fp.dp -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.main+dp/softfp"
 	{-march=armv8-m.main+fp+dsp -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.main+fp/softfp"
 	{-march=armv8-m.main+fp.dp+dsp -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.main+dp/softfp"
+	{-march=armv8-r -mfpu=auto -mfloat-abi=softfp} "thumb/v7/nofp"
+	{-march=armv8-r+crc -mfpu=auto -mfloat-abi=softfp} "thumb/v7/nofp"
+	{-march=armv8-r+simd -mfpu=auto -mfloat-abi=softfp} "thumb/v7+fp/softfp"
+	{-march=armv8-r+crc+simd -mfpu=auto -mfloat-abi=softfp} "thumb/v7+fp/softfp"
+	{-march=armv8-r+crypto -mfpu=auto -mfloat-abi=softfp} "thumb/v7+fp/softfp"
+	{-march=armv8-r+crc+crypto -mfpu=auto -mfloat-abi=softfp} "thumb/v7+fp/softfp"
 	{-march=armv6-m -mfpu=vfpv3xd -mfloat-abi=softfp} "thumb/v6-m/nofp"
 	{-march=armv7-m -mfpu=vfpv3xd -mfloat-abi=softfp} "thumb/v7-m/nofp"
 	{-march=armv7e-m -mfpu=vfpv3xd -mfloat-abi=softfp} "thumb/v7e-m+fp/softfp"