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Re: [PATCH][ARM] Add a missing fix in a previous patch for ICE 64-bit moves (rev 147612)


=?Big5?B?RG91ZyBLd2FuICjD9q62vHcp?= writes:
 > Hi,
 > 
 > This is a follow up of the following patch:
 > 
 > http://gcc.gnu.org/ml/gcc-patches/2009-05/msg00994.html
 > 
 > which fixes an ICE bug in adddi3.  A similar problem exists in subdi3
 > but Richard's original patch does not fix that.  The patch below
 > addresses the remaining issue.  it has been tested on
 > arm-unknown-linux-gnueabi with no new regressions.

By visual inspection of the code there appears to be a similar problem
in negdi2, see the patch below. Unfortunately my attempts to construct
a test case triggering that pattern failed.

/Mikael

--- gcc-4.5-20090723/gcc/config/arm/arm.md.~1~	2009-07-23 17:02:20.000000000 +0200
+++ gcc-4.5-20090723/gcc/config/arm/arm.md	2009-07-24 23:17:40.000000000 +0200
@@ -3507,7 +3507,7 @@ (define_expand "negdi2"
   if (TARGET_THUMB1)
     {
       if (GET_CODE (operands[1]) != REG)
-        operands[1] = force_reg (SImode, operands[1]);
+        operands[1] = force_reg (DImode, operands[1]);
      }
   "
 )


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