[GCC][PATCH][ARM] Add multilib mapping for Armv8.1-M+MVE with -mfloat-abi=hard

This patch adds a new multilib for armv8.1-m.main+mve with hard float abi. For
armv8.1-m.main+mve soft and softfp, the v8-M multilibs will be reused.
The following mappings are also updated:
"-mfloat-abi=hard -march=armv8.1-m.main+mve.fp -> armv8-m.main+fp/hard"
"-mfloat-abi=softfp -march=armv8.1-m.main+mve.fp -> armv8-m.main+fp/softfp"
"-mfloat-abi=soft -march=armv8.1-m.main+mve.fp -> armv8-m.main/nofp"
gcc/ChangeLog:

2020-03-17  Mihail Ionescu  <mihail.ionescu@arm.com>

	* config/arm/t-rmprofile: create new multilib for
	armv8.1-m.main+mve hard float and reuse v8-m.main ones for
	v8.1-m.main+mve .

gcc/testsuite/ChangeLog:

2020-03-17  Mihail Ionescu  <mihail.ionescu@arm.com>

	* gcc.target/arm/multilib.exp: Add new v8.1-M entry.

libgcc/ChangLog:

2020-03-17  Mihail Ionescu  <mihail.ionescu@arm.com>

	* config/arm/t-arm: Do not compile cmse_nonsecure_call.S for v8.1-m.

gcc/ChangeLog

+2020-03-17  Mihail Ionescu  <mihail.ionescu@arm.com>
+
+	* config/arm/t-rmprofile: create new multilib for
+	armv8.1-m.main+mve hard float and reuse v8-m.main ones for
+	v8.1-m.main+mve.
+
 2020-03-17  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/94015

gcc/config/arm/t-rmprofile

@@ -27,8 +27,8 @@
 
 # Arch and FPU variants to build libraries with
 
-MULTI_ARCH_OPTS_RM	= march=armv6s-m/march=armv7-m/march=armv7e-m/march=armv7e-m+fp/march=armv7e-m+fp.dp/march=armv8-m.base/march=armv8-m.main/march=armv8-m.main+fp/march=armv8-m.main+fp.dp
-MULTI_ARCH_DIRS_RM	= v6-m v7-m v7e-m v7e-m+fp v7e-m+dp v8-m.base v8-m.main v8-m.main+fp v8-m.main+dp
+MULTI_ARCH_OPTS_RM	= march=armv6s-m/march=armv7-m/march=armv7e-m/march=armv7e-m+fp/march=armv7e-m+fp.dp/march=armv8-m.base/march=armv8-m.main/march=armv8-m.main+fp/march=armv8-m.main+fp.dp/march=armv8.1-m.main+mve
+MULTI_ARCH_DIRS_RM	= v6-m v7-m v7e-m v7e-m+fp v7e-m+dp v8-m.base v8-m.main v8-m.main+fp v8-m.main+dp v8.1-m.main+mve
 
 # Base M-profile (no fp)
 MULTILIB_REQUIRED	+= mthumb/march=armv6s-m/mfloat-abi=soft
@@ -48,8 +48,7 @@ MULTILIB_REQUIRED	+= mthumb/march=armv8-m.main+fp/mfloat-abi=hard
 MULTILIB_REQUIRED	+= mthumb/march=armv8-m.main+fp/mfloat-abi=softfp
 MULTILIB_REQUIRED	+= mthumb/march=armv8-m.main+fp.dp/mfloat-abi=hard
 MULTILIB_REQUIRED	+= mthumb/march=armv8-m.main+fp.dp/mfloat-abi=softfp
-
-
+MULTILIB_REQUIRED	+= mthumb/march=armv8.1-m.main+mve/mfloat-abi=hard
 
 # Arch Matches
 MULTILIB_MATCHES	+= march?armv6s-m=march?armv6-m
@@ -66,12 +65,14 @@ MULTILIB_MATCHES	+= march?armv7e-m+fp=march?armv7e-m+fpv5
 MULTILIB_REUSE		+= $(foreach ARCH, armv6s-m armv7-m armv7e-m armv8-m\.base armv8-m\.main, \
 			     mthumb/march.$(ARCH)/mfloat-abi.soft=mthumb/march.$(ARCH)/mfloat-abi.softfp)
 
+
 # Map v8.1-M to v8-M.
 MULTILIB_MATCHES	+= march?armv8-m.main=march?armv8.1-m.main
 MULTILIB_MATCHES	+= march?armv8-m.main=march?armv8.1-m.main+dsp
-MULTILIB_MATCHES	+= march?armv8-m.main=march?armv8.1-m.main+mve
+MULTILIB_REUSE		+= mthumb/march.armv8-m\.main/mfloat-abi.soft=mthumb/march.armv8\.1-m\.main+mve/mfloat-abi.soft
+MULTILIB_REUSE		+= mthumb/march.armv8-m\.main/mfloat-abi.soft=mthumb/march.armv8\.1-m\.main+mve/mfloat-abi.softfp
 
-v8_1m_sp_variants = +fp +dsp+fp +mve.fp
+v8_1m_sp_variants = +fp +dsp+fp +mve.fp +fp+mve
 v8_1m_dp_variants = +fp.dp +dsp+fp.dp +fp.dp+mve +fp.dp+mve.fp
 
 # Map all v8.1-m.main FP sp variants down to v8-m.

gcc/testsuite/ChangeLog

+2020-03-17  Mihail Ionescu  <mihail.ionescu@arm.com>
+
+	* gcc.target/arm/multilib.exp: Add new v8.1-M entry.
+
 2020-03-17  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/94015

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

@@ -814,6 +814,9 @@ if {[multilib_config "rmprofile"] } {
 	{-march=armv8.1-m.main+mve.fp -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.main/nofp"
 	{-march=armv8.1-m.main+mve -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.main/nofp"
 	{-march=armv8.1-m.main+mve.fp -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.main+fp/softfp"
+	{-march=armv8.1-m.main+mve -mfpu=auto -mfloat-abi=hard} "thumb/v8.1-m.main+mve/hard"
+	{-march=armv8.1-m.main+mve+fp -mfpu=auto -mfloat-abi=hard} "thumb/v8-m.main+fp/hard"
+	{-march=armv8.1-m.main+mve+fp -mfpu=auto -mfloat-abi=softfp} "thumb/v8-m.main+fp/softfp"
 	{-march=armv8.1-m.main+mve.fp -mfpu=auto -mfloat-abi=hard} "thumb/v8-m.main+fp/hard"
 	{-march=armv8.1-m.main+mve+fp.dp -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.main/nofp"
 	{-march=armv8.1-m.main+mve.fp+fp.dp -mfpu=auto -mfloat-abi=soft} "thumb/v8-m.main/nofp"

libgcc/ChangeLog

+2020-03-17  Mihail Ionescu  <mihail.ionescu@arm.com>
+
+	* config/arm/t-arm: Do not compile cmse_nonsecure_call.S for v8.1-m.
+
 2020-03-04  Andreas Krebbel  <krebbel@linux.ibm.com>
 
 	* config.host: Include the new makefile fragment.

libgcc/config/arm/t-arm

@@ -3,11 +3,13 @@ LIB1ASMFUNCS = _thumb1_case_sqi _thumb1_case_uqi _thumb1_case_shi \
 	_thumb1_case_uhi _thumb1_case_si _speculation_barrier
 
 HAVE_CMSE:=$(findstring __ARM_FEATURE_CMSE,$(shell $(gcc_compile_bare) -dM -E - </dev/null))
+HAVE_V81M:=$(findstring armv8.1-m.main,$(gcc_compile_bare))
 ifeq ($(shell $(gcc_compile_bare) -E -mcmse - </dev/null >/dev/null 2>/dev/null; echo $?),0)
 CMSE_OPTS:=-mcmse
 endif
 
 ifdef HAVE_CMSE
+ifndef HAVE_V81M
 libgcc-objects += cmse.o cmse_nonsecure_call.o
 
 cmse.o: $(srcdir)/config/arm/cmse.c
@@ -15,3 +17,4 @@ cmse.o: $(srcdir)/config/arm/cmse.c
 cmse_nonsecure_call.o: $(srcdir)/config/arm/cmse_nonsecure_call.S
 		       $(gcc_compile) -c $<
 endif
+endif