Hello!
Remove dead code, obsoleted by cbranch rewrite years ago.
2017-10-11 Uros Bizjak <ubiz...@gmail.com>
* config/i386/i386.md (*cmp<X87MODEF:mode>_<SWI24:mode>_i387):
Do not use float_operator operator predicate.
(*cmp<X87MODEF:mode>_<SWI24:mode>_cc_i387): Ditto.
* config/i386/predicates.md (float_operator): Remove predicate.
2017-10-11 Uros Bizjak <ubiz...@gmail.com>
* config/i386/i386.md (*jcc<mode>_0_i387): Remove insn pattern.
(*jccxf_i387): Ditto.
(*jcc<mode>_i387): Ditto.
(*jccu<mode>_i387): Ditto.
(*jcc<X87MODEF:mode>_<SWI24:mode>_i387): Ditto.
(*jcc_*_i387 splitters): Remove.
* config/i386/i386-protos.h (ix86_split_fp_branch): Remove prototype.
* config/i386/i386.c (ix86_split_fp_branch): Remove.
* config/i386/predicates.md (ix86_swapped_fp_comparison_operator):
Remove predicate.
testsuite/ChangeLog:
2017-10-11 Uros Bizjak <ubiz...@gmail.com>
* gcc.target/i386/387-ficom-1.c: New test.
Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.
Committed to mainline SVN.
Uros.
Index: config/i386/i386-protos.h
===================================================================
--- config/i386/i386-protos.h (revision 253645)
+++ config/i386/i386-protos.h (working copy)
@@ -165,9 +165,6 @@ extern void ix86_asm_output_function_label (FILE *
extern void ix86_call_abi_override (const_tree);
extern int ix86_reg_parm_stack_space (const_tree);
-extern void ix86_split_fp_branch (enum rtx_code code, rtx, rtx,
- rtx, rtx, rtx);
-
extern bool ix86_libc_has_function (enum function_class fn_class);
extern void x86_order_regs_for_local_alloc (void);
Index: config/i386/i386.c
===================================================================
--- config/i386/i386.c (revision 253645)
+++ config/i386/i386.c (working copy)
@@ -24339,32 +24339,7 @@ ix86_expand_branch (enum rtx_code code, rtx op0, r
}
}
-/* Split branch based on floating point condition. */
void
-ix86_split_fp_branch (enum rtx_code code, rtx op1, rtx op2,
- rtx target1, rtx target2, rtx tmp)
-{
- rtx condition;
- rtx_insn *i;
-
- if (target2 != pc_rtx)
- {
- std::swap (target1, target2);
- code = reverse_condition_maybe_unordered (code);
- }
-
- condition = ix86_expand_fp_compare (code, op1, op2,
- tmp);
-
- i = emit_jump_insn (gen_rtx_SET
- (pc_rtx,
- gen_rtx_IF_THEN_ELSE (VOIDmode,
- condition, target1, target2)));
- if (split_branch_probability.initialized_p ())
- add_reg_br_prob_note (i, split_branch_probability);
-}
-
-void
ix86_expand_setcc (rtx dest, enum rtx_code code, rtx op0, rtx op1)
{
rtx ret;
Index: config/i386/i386.md
===================================================================
--- config/i386/i386.md (revision 253645)
+++ config/i386/i386.md (working copy)
@@ -1612,8 +1612,8 @@
(unspec:HI
[(compare:CCFP
(match_operand:X87MODEF 1 "register_operand" "f")
- (match_operator:X87MODEF 3 "float_operator"
- [(match_operand:SWI24 2 "memory_operand" "m")]))]
+ (float:X87MODEF
+ (match_operand:SWI24 2 "memory_operand" "m")))]
UNSPEC_FNSTSW))]
"TARGET_80387
&& (TARGET_USE_<SWI24:MODE>MODE_FIOP
@@ -1628,8 +1628,8 @@
[(set (reg:CCFP FLAGS_REG)
(compare:CCFP
(match_operand:X87MODEF 1 "register_operand" "f")
- (match_operator:X87MODEF 3 "float_operator"
- [(match_operand:SWI24 2 "memory_operand" "m")])))
+ (float:X87MODEF
+ (match_operand:SWI24 2 "memory_operand" "m"))))
(clobber (match_operand:HI 0 "register_operand" "=a"))]
"TARGET_80387 && TARGET_SAHF && !TARGET_CMOVE
&& (TARGET_USE_<SWI24:MODE>MODE_FIOP
@@ -1640,7 +1640,7 @@
(unspec:HI
[(compare:CCFP
(match_dup 1)
- (match_op_dup 3 [(match_dup 2)]))]
+ (float:X87MODEF (match_dup 2)))]
UNSPEC_FNSTSW))
(set (reg:CC FLAGS_REG)
(unspec:CC [(match_dup 0)] UNSPEC_SAHF))]
@@ -12032,142 +12032,6 @@
if (! ix86_comparison_operator (operands[0], VOIDmode))
FAIL;
})
-
-;; Define combination compare-and-branch fp compare instructions to help
-;; combine.
-
-(define_insn "*jcc<mode>_0_i387"
- [(set (pc)
- (if_then_else (match_operator:CCFP 0 "ix86_fp_comparison_operator"
- [(match_operand:X87MODEF 1 "register_operand" "f")
- (match_operand:X87MODEF 2 "const0_operand")])
- (label_ref (match_operand 3))
- (pc)))
- (clobber (reg:CCFP FPSR_REG))
- (clobber (reg:CCFP FLAGS_REG))
- (clobber (match_scratch:HI 4 "=a"))]
- "TARGET_80387 && !TARGET_CMOVE"
- "#")
-
-(define_insn "*jccxf_i387"
- [(set (pc)
- (if_then_else (match_operator:CCFP 0 "ix86_fp_comparison_operator"
- [(match_operand:XF 1 "register_operand" "f")
- (match_operand:XF 2 "register_operand" "f")])
- (label_ref (match_operand 3))
- (pc)))
- (clobber (reg:CCFP FPSR_REG))
- (clobber (reg:CCFP FLAGS_REG))
- (clobber (match_scratch:HI 4 "=a"))]
- "TARGET_80387 && !TARGET_CMOVE"
- "#")
-
-(define_insn "*jcc<mode>_i387"
- [(set (pc)
- (if_then_else (match_operator:CCFP 0 "ix86_fp_comparison_operator"
- [(match_operand:MODEF 1 "register_operand" "f")
- (match_operand:MODEF 2 "nonimmediate_operand" "fm")])
- (label_ref (match_operand 3))
- (pc)))
- (clobber (reg:CCFP FPSR_REG))
- (clobber (reg:CCFP FLAGS_REG))
- (clobber (match_scratch:HI 4 "=a"))]
- "TARGET_80387 && !TARGET_CMOVE"
- "#")
-
-(define_insn "*jccu<mode>_i387"
- [(set (pc)
- (if_then_else (match_operator:CCFPU 0 "ix86_fp_comparison_operator"
- [(match_operand:X87MODEF 1 "register_operand" "f")
- (match_operand:X87MODEF 2 "register_operand" "f")])
- (label_ref (match_operand 3))
- (pc)))
- (clobber (reg:CCFP FPSR_REG))
- (clobber (reg:CCFP FLAGS_REG))
- (clobber (match_scratch:HI 4 "=a"))]
- "TARGET_80387 && !TARGET_CMOVE"
- "#")
-
-(define_split
- [(set (pc)
- (if_then_else (match_operator 0 "ix86_fp_comparison_operator"
- [(match_operand:X87MODEF 1 "register_operand")
- (match_operand:X87MODEF 2 "nonimmediate_operand")])
- (match_operand 3)
- (match_operand 4)))
- (clobber (reg:CCFP FPSR_REG))
- (clobber (reg:CCFP FLAGS_REG))]
- "TARGET_80387 && !TARGET_CMOVE
- && reload_completed"
- [(const_int 0)]
-{
- ix86_split_fp_branch (GET_CODE (operands[0]), operands[1], operands[2],
- operands[3], operands[4], NULL_RTX);
- DONE;
-})
-
-(define_split
- [(set (pc)
- (if_then_else (match_operator 0 "ix86_fp_comparison_operator"
- [(match_operand:X87MODEF 1 "register_operand")
- (match_operand:X87MODEF 2 "general_operand")])
- (match_operand 3)
- (match_operand 4)))
- (clobber (reg:CCFP FPSR_REG))
- (clobber (reg:CCFP FLAGS_REG))
- (clobber (match_scratch:HI 5))]
- "TARGET_80387 && !TARGET_CMOVE
- && reload_completed"
- [(const_int 0)]
-{
- ix86_split_fp_branch (GET_CODE (operands[0]), operands[1], operands[2],
- operands[3], operands[4], operands[5]);
- DONE;
-})
-
-;; The order of operands in *jcc<fp>_<int>_i387 is forced by combine in
-;; simplify_comparison () function. Float operator is treated as RTX_OBJ
-;; with a precedence over other operators and is always put in the first
-;; place. Swap condition and operands to match ficom instruction.
-
-(define_insn "*jcc<X87MODEF:mode>_<SWI24:mode>_i387"
- [(set (pc)
- (if_then_else
- (match_operator:CCFP 0 "ix86_swapped_fp_comparison_operator"
- [(match_operator:X87MODEF 1 "float_operator"
- [(match_operand:SWI24 2 "nonimmediate_operand" "m")])
- (match_operand:X87MODEF 3 "register_operand" "f")])
- (label_ref (match_operand 4))
- (pc)))
- (clobber (reg:CCFP FPSR_REG))
- (clobber (reg:CCFP FLAGS_REG))
- (clobber (match_scratch:HI 5 "=a"))]
- "TARGET_80387 && !TARGET_CMOVE
- && (TARGET_USE_<SWI24:MODE>MODE_FIOP
- || optimize_function_for_size_p (cfun))"
- "#")
-
-(define_split
- [(set (pc)
- (if_then_else
- (match_operator:CCFP 0 "ix86_swapped_fp_comparison_operator"
- [(match_operator:X87MODEF 1 "float_operator"
- [(match_operand:SWI24 2 "memory_operand")])
- (match_operand:X87MODEF 3 "register_operand")])
- (match_operand 4)
- (match_operand 5)))
- (clobber (reg:CCFP FPSR_REG))
- (clobber (reg:CCFP FLAGS_REG))
- (clobber (match_scratch:HI 6))]
- "TARGET_80387 && !TARGET_CMOVE
- && reload_completed"
- [(const_int 0)]
-{
- ix86_split_fp_branch (swap_condition (GET_CODE (operands[0])), operands[3],
- gen_rtx_FLOAT (GET_MODE (operands[1]), operands[2]),
- operands[4], operands[5], operands[6]);
- DONE;
-})
;; Unconditional and other jump instructions
Index: config/i386/predicates.md
===================================================================
--- config/i386/predicates.md (revision 253645)
+++ config/i386/predicates.md (working copy)
@@ -1387,19 +1387,6 @@
(match_operand 0 "comparison_operator")
(match_operand 0 "ix86_trivial_fp_comparison_operator")))
-;; Same as above, but for swapped comparison used in *jcc<fp>_<int>_i387.
-(define_predicate "ix86_swapped_fp_comparison_operator"
- (match_operand 0 "comparison_operator")
-{
- enum rtx_code code = GET_CODE (op);
- bool ret;
-
- PUT_CODE (op, swap_condition (code));
- ret = ix86_fp_comparison_operator (op, mode);
- PUT_CODE (op, code);
- return ret;
-})
-
;; Nearly general operand, but accept any const_double, since we wish
;; to be able to drop them into memory rather than have them get pulled
;; into registers.
@@ -1423,10 +1410,6 @@
(define_predicate "plusminuslogic_operator"
(match_code "plus,minus,and,ior,xor"))
-;; Return true if this is a float extend operation.
-(define_predicate "float_operator"
- (match_code "float"))
-
;; Return true for ARITHMETIC_P.
(define_predicate "arith_or_logical_operator"
(match_code "plus,mult,and,ior,xor,smin,smax,umin,umax,compare,minus,div,
Index: testsuite/gcc.target/i386/387-ficom-1.c
===================================================================
--- testsuite/gcc.target/i386/387-ficom-1.c (nonexistent)
+++ testsuite/gcc.target/i386/387-ficom-1.c (working copy)
@@ -0,0 +1,41 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target ia32 } */
+/* { dg-skip-if "" { *-*-* } { "-march=*" } { "-march=i386" } } */
+/* { dg-options "-O2 -march=i386 -ffast-math -masm=att" } */
+
+extern short s;
+
+int test_f_s (short x)
+{
+ return (float)x > s;
+}
+
+int test_d_s (short x)
+{
+ return (double)x < s;
+}
+
+int test_ld_s (short x)
+{
+ return (long double)x == s;
+}
+
+extern int i;
+
+int test_f_i (int x)
+{
+ return (float)i >= x;
+}
+
+int test_d_i (int x)
+{
+ return (double)i <= x;
+}
+
+int test_ld_i (int x)
+{
+ return (long double)i != x;
+}
+
+/* { dg-final { scan-assembler-times "ficomps" 3 } } */
+/* { dg-final { scan-assembler-times "ficompl" 3 } } */
