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[PATCH]: Fix HC11 address computation using stack pointer
- To: gcc-patches at gcc dot gnu dot org
- Subject: [PATCH]: Fix HC11 address computation using stack pointer
- From: Stephane Carrez <Stephane dot Carrez at worldnet dot fr>
- Date: Mon, 01 Oct 2001 15:44:04 +0200
Hi!
I've committed the following patch on 3_0 branch and mainline to fix
the HC11 code generation with -fomit-frame-pointer. Address computation
with the stack pointer was not correct in some cases.
Stephane
2001-10-01 Stephane Carrez <Stephane.Carrez@worldnet.fr>
* config/m68hc11/m68hc11.md ("add-split"): Fix add split when
operand 2 is the stack pointer.
("addr-peephole"): Fix address computation peephole when operand 2
is the stack pointer.
Index: config/m68hc11/m68hc11.md
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/m68hc11/m68hc11.md,v
retrieving revision 1.18
diff -u -p -r1.18 m68hc11.md
--- m68hc11.md 2001/09/30 17:33:18 1.18
+++ m68hc11.md 2001/10/01 13:30:31
@@ -3657,8 +3657,9 @@
(set (match_dup 0) (reg:HI D_REGNUM))])]
"
/* Save the operand2 in a temporary location and use it. */
- if (H_REG_P (operands[2])
- || reg_mentioned_p (operands[0], operands[2]))
+ if ((H_REG_P (operands[2])
+ || reg_mentioned_p (operands[0], operands[2]))
+ && !(SP_REG_P (operands[2]) && GET_CODE (operands[3]) == PLUS))
{
operands[4] = gen_rtx (REG, HImode, SOFT_TMP_REGNUM);
operands[6] = operands[4];
@@ -6121,9 +6122,14 @@
{
int value_loaded = 1;
- if (X_REG_P (operands[0]))
+ if (X_REG_P (operands[0]) || SP_REG_P (operands[2]))
{
- output_asm_insn (\"ldx\\t%2\\n\\txgdx\", operands);
+ rtx ops[2];
+
+ ops[0] = operands[0];
+ ops[1] = operands[2];
+ m68hc11_gen_movhi (insn, ops);
+ output_asm_insn (\"xgd%0\", operands);
}
else if (Y_REG_P (operands[0]))
{