[PATCH][arm] [backport] arm: Fix rmprofile multilibs when architecture includes +mp or +sec (PR target/93188)

[Przemyslaw Wirkus]

Hi,
When only the rmprofile multilibs are built, compiling for armv7-a
should select the generic v7 multilibs.  This used to work before +sec
and +mp were added to the architecture options but it was broken by
that update.  This patch fixes those variants and adds some tests to
ensure that they remain fixed ;-)

gcc/ChangeLog:
2020-01-08  Przemyslaw Wirkus  <przemyslaw.wir...@arm.com>

        Backport from trunk
        PR target/93188
        * config/arm/t-multilib (MULTILIB_MATCHES): Add rules to match
        armv7-a{+mp,+sec,+mp+sec} to appropriate armv7 multilib variants
        when only building rm-profile multilibs.

gcc/testsuite/ChangeLog:
2020-01-08  Przemyslaw Wirkus  <przemyslaw.wir...@arm.com>

        Backport from trunk
        * gcc.target/arm/multilib.exp: Add new tests for rm-profile only.

Ok for gcc-9-branch?

kind regards
Przemyslaw Wirkus

diff --git a/gcc/config/arm/t-multilib b/gcc/config/arm/t-multilib
index 
dc97c8f09fb0b7f53520432e1a174adfce1bf6af..182df6e94133d01500de24f511b61beb80152a0e
 100644
--- a/gcc/config/arm/t-multilib
+++ b/gcc/config/arm/t-multilib
@@ -132,10 +132,19 @@ MULTILIB_MATCHES  += 
march?armv7-r+fp.sp=march?armv8-r+crc+fp.sp
 
 ifeq (,$(HAS_APROFILE))
 # Map all v7-a
+
 MULTILIB_MATCHES       += march?armv7=march?armv7-a
+
+MULTILIB_MATCHES       += $(foreach ARCH, $(v7_a_arch_variants), \
+                            march?armv7=march?armv7-a$(ARCH))
+
 MULTILIB_MATCHES       += $(foreach ARCH, $(v7_a_nosimd_variants) 
$(v7_a_simd_variants), \
                             march?armv7+fp=march?armv7-a$(ARCH))
 
+MULTILIB_MATCHES       += $(foreach ARCHVAR, $(v7_a_arch_variants), \
+                            $(foreach ARCH, $(v7_a_nosimd_variants) 
$(v7_a_simd_variants), \
+                              march?armv7+fp=march?armv7-a$(ARCHVAR)$(ARCH)))
+
 MULTILIB_MATCHES       += march?armv7=march?armv7ve
 
 # ARMv7ve FP/SIMD variants: map down to v7+fp
diff --git a/gcc/testsuite/gcc.target/arm/multilib.exp 
b/gcc/testsuite/gcc.target/arm/multilib.exp
index 
dcea829965eb15e372401e6389df5a1403393ecb..2df3f9c3117432299ad6ce8746babd5ff4abe405
 100644
--- a/gcc/testsuite/gcc.target/arm/multilib.exp
+++ b/gcc/testsuite/gcc.target/arm/multilib.exp
@@ -434,6 +434,22 @@ if {[multilib_config "aprofile"] } {
        check_multi_dir $opts $dir
     }
 }
+if {[multilib_config "rmprofile"] && ![multilib_config "aprofile"]} {
+    foreach {opts dir} {
+       {-mcpu=cortex-a9 -mfpu=auto -mfloat-abi=soft} "thumb/v7/nofp"
+       {-mcpu=cortex-a8 -mfpu=auto -mfloat-abi=softfp} "thumb/v7+fp/softfp"
+       {-mcpu=cortex-a5 -mfpu=auto -mfloat-abi=hard} "thumb/v7+fp/hard"
+       {-mcpu=cortex-a53 -mfpu=auto -mfloat-abi=hard} "thumb/v7+fp/hard"
+       {-march=armv7-a+fp -mfpu=auto -mfloat-abi=softfp} "thumb/v7+fp/softfp"
+       {-march=armv7-a+fp -mfpu=auto -mfloat-abi=soft} "thumb/v7/nofp"
+       {-march=armv7-a+mp+simd -mfpu=auto -mfloat-abi=softfp} 
"thumb/v7+fp/softfp"
+       {-march=armv7-a -mfpu=vfpv4 -mfloat-abi=hard} "thumb/v7+fp/hard"
+       {-march=armv7-a+fp -mfpu=auto -mfloat-abi=hard} "thumb/v7+fp/hard"
+       {-march=armv7-a -mfpu=vfpv4 -mfloat-abi=soft} "thumb/v7/nofp"
+    } {
+       check_multi_dir $opts $dir
+    }
+}
 if {[multilib_config "rmprofile"] } {
     foreach {opts dir} {
        {-mcpu=cortex-m0 -mfpu=auto -mfloat-abi=soft} "thumb/v6-m/nofp"