[arm] Remove mode26 feature bit

    * config/arm/arm-cpus.in (mode26): Delete.
    (armv4): Delete mode26 reference.
    * config/arm/arm.c (arm_configure_build_target): Delete use of
    isa_bit_mode26.

From-SVN: r260615

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e9268d6..12895be 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2018-05-23  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+       * config/arm/arm-cpus.in (mode26): Delete.
+       (armv4): Delete mode26 reference.
+       * config/arm/arm.c (arm_configure_build_target): Delete use of
+       isa_bit_mode26.
+
 2018-05-23  Uros Bizjak  <ubizjak@gmail.com>
 
        * config/i386/i386.md (*floatuns<SWI48:mode><MODEF:mode>2_avx512):

diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
index 16a381c..aec73b5 100644 (file)
--- a/gcc/config/arm/arm-cpus.in
+++ b/gcc/config/arm/arm-cpus.in
@@ -48,9 +48,6 @@
 
 # Features - general convention: all lower case.
 
-# 26-bit mode support
-define feature mode26
-
 # Architecture rel 4
 define feature armv4
 
@@ -274,11 +271,9 @@ begin arch armv4
  tune for arm7tdmi
  tune flags CO_PROC
  base 4
- isa ARMv4 mode26
+ isa ARMv4
 end arch armv4
 
-# Strictly, mode26 is a permitted option for v4t, but there are no
-# implementations that support it, so we will leave it out for now.
 begin arch armv4t
  tune for arm7tdmi
  tune flags CO_PROC

diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 4a5da7e..c70be36 100644 (file)
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -3232,16 +3232,7 @@ arm_configure_build_target (struct arm_build_target *target,
         switches that require certain abilities from the cpu.  */
 
       if (TARGET_INTERWORK || TARGET_THUMB)
-       {
-         bitmap_set_bit (sought_isa, isa_bit_thumb);
-
-         /* There are no ARM processors that support both APCS-26 and
-            interworking.  Therefore we forcibly remove MODE26 from
-            from the isa features here (if it was set), so that the
-            search below will always be able to find a compatible
-            processor.  */
-         bitmap_clear_bit (default_isa, isa_bit_mode26);
-       }
+       bitmap_set_bit (sought_isa, isa_bit_thumb);
 
       /* If there are such requirements and the default CPU does not
         satisfy them, we need to run over the complete list of