The mmixed-code option is obsolete, remove it.

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claz...@synopsys.com>

        * config/arc/arc.c (arc_override_options): Remove
        TARGET_MIXED_CODE reference.
        * config/arc/arc.md (abssi2_mixed): Remove pattern.
        * config/arc/arc.h (TARGET_MIXED_CODE): Remove macro.
        (INDEX_REG_CLASS): Only refer to GENERAL_REGS.
        * config/arc/arc.opt (mmixed-code): Remove option.
        * doc/invoke.texi (ARC): Remove mmixed-code doc.
---
 gcc/config/arc/arc.h   | 4 +---
 gcc/config/arc/arc.md  | 8 --------
 gcc/config/arc/arc.opt | 8 --------
 gcc/doc/invoke.texi    | 8 +-------
 4 files changed, 2 insertions(+), 26 deletions(-)

diff --git a/gcc/config/arc/arc.h b/gcc/config/arc/arc.h
index b7fa7ba8fa3..21ffeee9ad2 100644
--- a/gcc/config/arc/arc.h
+++ b/gcc/config/arc/arc.h
@@ -115,8 +115,6 @@ extern const char *arc_cpu_to_as (int argc, const char 
**argv);
 
 /* Run-time compilation parameters selecting different hardware subsets.  */
 
-#define TARGET_MIXED_CODE (TARGET_MIXED_CODE_SET)
-
 #define TARGET_SPFP (TARGET_SPFP_FAST_SET || TARGET_SPFP_COMPACT_SET)
 #define TARGET_DPFP (TARGET_DPFP_FAST_SET || TARGET_DPFP_COMPACT_SET   \
                     || TARGET_FP_DP_AX)
@@ -571,7 +569,7 @@ extern enum reg_class arc_regno_reg_class[];
    a scale factor or added to another register (as well as added to a
    displacement).  */
 
-#define INDEX_REG_CLASS (TARGET_MIXED_CODE ? ARCOMPACT16_REGS : GENERAL_REGS)
+#define INDEX_REG_CLASS GENERAL_REGS
 
 /* The class value for valid base registers. A base register is one used in
    an address which is the register value plus a displacement.  */
diff --git a/gcc/config/arc/arc.md b/gcc/config/arc/arc.md
index a26a7a4dd5f..e1958fda2e6 100644
--- a/gcc/config/arc/arc.md
+++ b/gcc/config/arc/arc.md
@@ -2001,14 +2001,6 @@ archs4x, archs4xd"
 
 ;; Absolute instructions
 
-(define_insn "*abssi2_mixed"
-  [(set (match_operand:SI 0 "compact_register_operand" "=q")
-       (abs:SI (match_operand:SI 1 "compact_register_operand" "q")))]
-  "TARGET_MIXED_CODE"
-  "abs%? %0,%1%&"
-  [(set_attr "type" "two_cycle_core")
-   (set_attr "iscompact" "true")])
-
 (define_insn "abssi2"
   [(set (match_operand:SI 0 "dest_reg_operand" "=Rcq#q,w,w")
        (abs:SI (match_operand:SI 1 "nonmemory_operand" "Rcq#q,cL,Cal")))]
diff --git a/gcc/config/arc/arc.opt b/gcc/config/arc/arc.opt
index deaf306739e..2b2b947ca08 100644
--- a/gcc/config/arc/arc.opt
+++ b/gcc/config/arc/arc.opt
@@ -135,14 +135,6 @@ mcode-density
 Target Report Mask(CODE_DENSITY)
 Enable code density instructions for ARCv2.
 
-mmixed-code
-Target Report Mask(MIXED_CODE_SET)
-Tweak register allocation to help 16-bit instruction generation.
-; originally this was:
-;Generate ARCompact 16-bit instructions intermixed with 32-bit instructions
-; but we do that without -mmixed-code, too, it's just a different instruction
-; count / size tradeoff.
-
 ; We use an explict definition for the negative form because that is the
 ; actually interesting option, and we want that to have its own comment.
 mvolatile-cache
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 8c6c90217f4..7627e889b5d 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -727,7 +727,7 @@ Objective-C and Objective-C++ Dialects}.
 -mcase-vector-pcrel  -mcompact-casesi  -mno-cond-exec  -mearly-cbranchsi @gol
 -mexpand-adddi  -mindexed-loads  -mlra  -mlra-priority-none @gol
 -mlra-priority-compact mlra-priority-noncompact  -mmillicode @gol
--mmixed-code  -mq-class  -mRcq  -mRcw  -msize-level=@var{level} @gol
+-mq-class  -mRcq  -mRcw  -msize-level=@var{level} @gol
 -mtune=@var{cpu}  -mmultcost=@var{num}  -mcode-density-frame @gol
 -munalign-prob-threshold=@var{probability}  -mmpy-option=@var{multo} @gol
 -mdiv-rem  -mcode-density  -mll64  -mfpu=@var{fpu}  -mrf16  -mbranch-index}
@@ -17956,12 +17956,6 @@ This option enable the compiler to emit @code{enter} 
and @code{leave}
 instructions.  These instructions are only valid for CPUs with
 code-density feature.
 
-@item -mmixed-code
-@opindex mmixed-code
-Tweak register allocation to help 16-bit instruction generation.
-This generally has the effect of decreasing the average instruction size
-while increasing the instruction count.
-
 @item -mq-class
 @opindex mq-class
 Ths option is deprecated.  Enable @samp{q} instruction alternatives.
-- 
2.24.1

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