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riscv-gcc-1
Commit e770968b by Jim Wilson
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(mov*): Only accept store zero to memory insn if 

rtx_equal_function_value_matters is zero.

From-SVN: r3603
parent 778ebe62
Showing with 41 additions and 18 deletions
gcc/config/i960/i960.md
......@@ -549,13 +549,21 @@
;; to register move insn to a store (or load) insn without rerecognizing
;; the insn.
;; Special pattern for zero stores to memory for functions which don't use
;; the arg pointer.
;; The i960 does not have any store constant to memory instruction. However,
;; the calling convention is defined so that the arg pointer when it is not
;; overwise being used is zero. Thus, we can handle store zero to memory
;; by storing an unused arg pointer. The arg pointer will be unused if
;; current_function_args_size is zero. This value of this variable is not
;; valid until after all rtl generation is complete, including function
;; inlining (because a function that doesn't need an arg pointer may be
;; inlined into a function that does need an arg pointer), so we must also
;; check that rtx_equal_function_value_matters is zero.
(define_insn ""
[(set (match_operand:SI 0 "general_operand" "=d,d,d,m")
(match_operand:SI 1 "general_operand" "dI,i,m,dJ"))]
"current_function_args_size == 0
"(current_function_args_size == 0
&& rtx_equal_function_value_matters == 0)
&& (register_operand (operands[0], SImode)
|| register_operand (operands[1], SImode)
|| operands[1] == const0_rtx)"
......@@ -588,7 +596,8 @@
(define_insn ""
[(set (match_operand:SI 0 "general_operand" "=d,d,d,m")
(match_operand:SI 1 "general_operand" "dI,i,m,d"))]
"current_function_args_size != 0
"(current_function_args_size != 0
|| rtx_equal_function_value_matters != 0)
&& (register_operand (operands[0], SImode)
|| register_operand (operands[1], SImode))"
"*
......@@ -632,7 +641,8 @@
(define_insn ""
[(set (match_operand:HI 0 "general_operand" "=d,d,d,m")
(match_operand:HI 1 "general_operand" "dI,i,m,dJ"))]
"current_function_args_size == 0
"(current_function_args_size == 0
&& rtx_equal_function_value_matters == 0)
&& (register_operand (operands[0], HImode)
|| register_operand (operands[1], HImode)
|| operands[1] == const0_rtx)"
......@@ -666,7 +676,8 @@
(define_insn ""
[(set (match_operand:HI 0 "general_operand" "=d,d,d,m")
(match_operand:HI 1 "general_operand" "dI,i,m,d"))]
"current_function_args_size != 0
"(current_function_args_size != 0
|| rtx_equal_function_value_matters != 0)
&& (register_operand (operands[0], HImode)
|| register_operand (operands[1], HImode))"
"*
......@@ -707,7 +718,8 @@
(define_insn ""
[(set (match_operand:QI 0 "general_operand" "=d,d,d,m")
(match_operand:QI 1 "general_operand" "dI,i,m,dJ"))]
"current_function_args_size == 0
"(current_function_args_size == 0
&& rtx_equal_function_value_matters == 0)
&& (register_operand (operands[0], QImode)
|| register_operand (operands[1], QImode)
|| operands[1] == const0_rtx)"
......@@ -741,7 +753,8 @@
(define_insn ""
[(set (match_operand:QI 0 "general_operand" "=d,d,d,m")
(match_operand:QI 1 "general_operand" "dI,i,m,d"))]
"current_function_args_size != 0
"(current_function_args_size != 0
|| rtx_equal_function_value_matters != 0)
&& (register_operand (operands[0], QImode)
|| register_operand (operands[1], QImode))"
"*
......@@ -782,7 +795,8 @@
(define_insn ""
[(set (match_operand:DI 0 "general_operand" "=d,d,d,m,o")
(match_operand:DI 1 "general_operand" "dI,i,m,d,J"))]
"current_function_args_size == 0
"(current_function_args_size == 0
&& rtx_equal_function_value_matters == 0)
&& (register_operand (operands[0], DImode)
|| register_operand (operands[1], DImode)
|| operands[1] == const0_rtx)"
......@@ -809,7 +823,8 @@
(define_insn ""
[(set (match_operand:DI 0 "general_operand" "=d,d,d,m")
(match_operand:DI 1 "general_operand" "dI,i,m,d"))]
"current_function_args_size != 0
"(current_function_args_size != 0
|| rtx_equal_function_value_matters != 0)
&& (register_operand (operands[0], DImode)
|| register_operand (operands[1], DImode))"
"*
......@@ -842,7 +857,8 @@
(define_insn ""
[(set (match_operand:TI 0 "general_operand" "=d,d,d,m,o")
(match_operand:TI 1 "general_operand" "dI,i,m,d,J"))]
"current_function_args_size == 0
"(current_function_args_size == 0
&& rtx_equal_function_value_matters == 0)
&& (register_operand (operands[0], TImode)
|| register_operand (operands[1], TImode)
|| operands[1] == const0_rtx)"
......@@ -871,7 +887,8 @@
(define_insn ""
[(set (match_operand:TI 0 "general_operand" "=d,d,d,m")
(match_operand:TI 1 "general_operand" "dI,i,m,d"))]
"current_function_args_size != 0
"(current_function_args_size != 0
|| rtx_equal_function_value_matters != 0)
&& (register_operand (operands[0], TImode)
|| register_operand (operands[1], TImode))"
"*
......@@ -958,7 +975,8 @@
(define_insn ""
[(set (match_operand:DF 0 "general_operand" "=r,*f,d,d,m,o")
(match_operand:DF 1 "fpmove_src_operand" "r,GH,F,m,d,G"))]
"current_function_args_size == 0
"(current_function_args_size == 0
&& rtx_equal_function_value_matters == 0)
&& (register_operand (operands[0], DFmode)
|| register_operand (operands[1], DFmode)
|| operands[1] == CONST0_RTX (DFmode))"
......@@ -989,7 +1007,8 @@
(define_insn ""
[(set (match_operand:DF 0 "general_operand" "=r,*f,d,d,m")
(match_operand:DF 1 "fpmove_src_operand" "r,GH,F,m,d"))]
"current_function_args_size != 0
"(current_function_args_size != 0
|| rtx_equal_function_value_matters != 0)
&& (register_operand (operands[0], DFmode)
|| register_operand (operands[1], DFmode))"
"*
......@@ -1026,7 +1045,8 @@
(define_insn ""
[(set (match_operand:SF 0 "general_operand" "=r,*f,d,d,m")
(match_operand:SF 1 "fpmove_src_operand" "r,GH,F,m,dG"))]
"current_function_args_size == 0
"(current_function_args_size == 0
&& rtx_equal_function_value_matters == 0)
&& (register_operand (operands[0], SFmode)
|| register_operand (operands[1], SFmode)
|| operands[1] == CONST0_RTX (SFmode))"
......@@ -1056,7 +1076,8 @@
(define_insn ""
[(set (match_operand:SF 0 "general_operand" "=r,*f,d,d,m")
(match_operand:SF 1 "fpmove_src_operand" "r,GH,F,m,d"))]
"current_function_args_size != 0
"(current_function_args_size != 0
|| rtx_equal_function_value_matters != 0)
&& (register_operand (operands[0], SFmode)
|| register_operand (operands[1], SFmode))"
"*
......@@ -1907,7 +1928,8 @@
(define_insn ""
[(set (match_operand:TF 0 "general_operand" "=r,*f,d,d,m,o")
(match_operand:TF 1 "fpmove_src_operand" "r,GH,F,m,d,G"))]
"current_function_args_size == 0
"(current_function_args_size == 0
&& rtx_equal_function_value_matters == 0)
&& (register_operand (operands[0], TFmode)
|| register_operand (operands[1], TFmode)
|| operands[1] == CONST0_RTX (TFmode))"
......@@ -1940,7 +1962,8 @@
(define_insn ""
[(set (match_operand:TF 0 "general_operand" "=r,*f,d,d,m")
(match_operand:TF 1 "fpmove_src_operand" "r,GH,F,m,d"))]
"current_function_args_size != 0
"(current_function_args_size != 0
|| rtx_equal_function_value_matters != 0)
&& (register_operand (operands[0], TFmode)
|| register_operand (operands[1], TFmode))"
"*
......
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