yann@1: From http://gcc.gnu.org/ml/gcc-patches/2003-11/msg00832.html, by
yann@1: Richard Earnshaw.  Fixes http://gcc.gnu.org/PR22528
yann@1: 
yann@1: --- gcc-3.3.4/gcc/config/arm/arm.md.orig	2004-03-30 22:43:44.000000000 +0200
yann@1: +++ gcc-3.3.4/gcc/config/arm/arm.md	2005-08-15 12:21:55.000000000 +0200
yann@1: @@ -4275,7 +4275,7 @@
yann@1:     (set (match_dup 2)
yann@1:  	(ashiftrt:SI (match_operand 0 "" "") (const_int 8)))
yann@1:     ;; store the high byte
yann@1: -   (set (match_dup 4) (subreg:QI (match_dup 2) 0))]	;explicit subreg safe
yann@1: +   (set (match_dup 4) (match_dup 5))]
yann@1:    "TARGET_ARM"
yann@1:    "
yann@1:    {
yann@1: @@ -4291,7 +4291,8 @@
yann@1:      operands[1] = adjust_address (operands[1], QImode, 0);
yann@1:      operands[3] = gen_lowpart (QImode, operands[0]);
yann@1:      operands[0] = gen_lowpart (SImode, operands[0]);
yann@1: -    operands[2] = gen_reg_rtx (SImode); 
yann@1: +    operands[2] = gen_reg_rtx (SImode);
yann@1: +    operands[5] = gen_lowpart (QImode, operands[2]);
yann@1:    }"
yann@1:  )
yann@1:  
yann@1: @@ -4299,7 +4300,7 @@
yann@1:    [(set (match_dup 4) (match_dup 3))
yann@1:     (set (match_dup 2)
yann@1:  	(ashiftrt:SI (match_operand 0 "" "") (const_int 8)))
yann@1: -   (set (match_operand 1 "" "")	(subreg:QI (match_dup 2) 3))]
yann@1: +   (set (match_operand 1 "" "")	(match_dup 5))]
yann@1:    "TARGET_ARM"
yann@1:    "
yann@1:    {
yann@1: @@ -4316,13 +4317,14 @@
yann@1:      operands[3] = gen_lowpart (QImode, operands[0]);
yann@1:      operands[0] = gen_lowpart (SImode, operands[0]);
yann@1:      operands[2] = gen_reg_rtx (SImode);
yann@1: +    operands[5] = gen_lowpart (QImode, operands[2]);
yann@1:    }"
yann@1:  )
yann@1:  
yann@1:  ;; Subroutine to store a half word integer constant into memory.
yann@1:  (define_expand "storeinthi"
yann@1:    [(set (match_operand 0 "" "")
yann@1: -	(subreg:QI (match_operand 1 "" "") 0))
yann@1: +	(match_operand 1 "" ""))
yann@1:     (set (match_dup 3) (match_dup 2))]
yann@1:    "TARGET_ARM"
yann@1:    "
yann@1: @@ -4363,6 +4365,7 @@
yann@1:      operands[3] = adjust_address (op0, QImode, 1);
yann@1:      operands[0] = adjust_address (operands[0], QImode, 0);
yann@1:      operands[2] = gen_lowpart (QImode, operands[2]);
yann@1: +    operands[1] = gen_lowpart (QImode, operands[1]);
yann@1:    }"
yann@1:  )
yann@1:  
yann@1: @@ -4682,11 +4685,12 @@
yann@1:     (set (match_dup 3)
yann@1:  	(ashiftrt:SI (match_dup 2) (const_int 16)))
yann@1:     (set (match_operand:HI 0 "s_register_operand" "")
yann@1: -	(subreg:HI (match_dup 3) 0))]
yann@1: +	(match_dup 4))]
yann@1:    "TARGET_ARM"
yann@1:    "
yann@1:    operands[2] = gen_reg_rtx (SImode);
yann@1:    operands[3] = gen_reg_rtx (SImode);
yann@1: +  operands[4] = gen_lowpart (HImode, operands[3]);
yann@1:    "
yann@1:  )
yann@1: