From: Paul Brook <paul@codesourcery.com>
Date: Wed, 27 Sep 2006 17:09:40 +0000 (+0000)
Subject: re PR target/29230 (gcc-4.1 generates faulty asm on ARM when compiling openmsx 0... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=bcf640f76d83f5dcf813b5fca8075291872985eb;p=gcc.git

re PR target/29230 (gcc-4.1 generates faulty asm on ARM when compiling openmsx 0.6.1 with -O3)

2006-09-27  Paul Brook  <paul@codesourcery.com>

	PR target/29230
	gcc/
	* config/arm/arm.md (arith_adjacentmem): Handle large offsets.

From-SVN: r117253
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 584f6de2339..856bcb25433 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2006-09-27  Paul Brook  <paul@codesourcery.com>
+
+	PR target/29230
+	* config/arm/arm.md (arith_adjacentmem): Handle large offsets.
+
 2006-09-27  Richard Sandiford  <richard@codesourcery.com>
 
 	* reload1.c (alter_reg): Require the alignment of the stack slot to
diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md
index 9abe62c17f7..b28e3d01a57 100644
--- a/gcc/config/arm/arm.md
+++ b/gcc/config/arm/arm.md
@@ -9508,14 +9508,14 @@
     ldm[0] = base_reg;
     if (val1 !=0 && val2 != 0)
       {
+	rtx ops[3];
+
 	if (val1 == 4 || val2 == 4)
 	  /* Other val must be 8, since we know they are adjacent and neither
 	     is zero.  */
 	  output_asm_insn (\"ldm%?ib\\t%0, {%1, %2}\", ldm);
-	else
+	else if (const_ok_for_arm (val1) || const_ok_for_arm (-val1))
 	  {
-	    rtx ops[3];
-
 	    ldm[0] = ops[0] = operands[4];
 	    ops[1] = base_reg;
 	    ops[2] = GEN_INT (val1);
@@ -9525,6 +9525,17 @@
 	    else
 	      output_asm_insn (\"ldm%?da\\t%0, {%1, %2}\", ldm);
 	  }
+	else
+	  {
+	    /* Offset is out of range for a single add, so use two ldr.  */
+	    ops[0] = ldm[1];
+	    ops[1] = base_reg;
+	    ops[2] = GEN_INT (val1);
+	    output_asm_insn (\"ldr%?\\t%0, [%1, %2]\", ops);
+	    ops[0] = ldm[2];
+	    ops[2] = GEN_INT (val2);
+	    output_asm_insn (\"ldr%?\\t%0, [%1, %2]\", ops);
+	  }
       }
     else if (val1 != 0)
       {