[PATCH] Fix pr68917 ICE on __builtin_clz for tilegx

[Bernd Edlinger <bernd dot edlinger at hotmail dot de>]

Hi,


due to more thorough checks in the middle end the builtin clz instruction
causes now an ICE on the tilegx target.

I have built a tilegx-cross-comiler and inspected the generated code
to verify that the patch works.


Is is OK for trunk?


Thanks
Bernd.

Attachment: changelog-pr68917.txt
Description: changelog-pr68917.txt

Index: gcc/config/tilegx/tilegx.md
===================================================================
--- gcc/config/tilegx/tilegx.md	(revision 231954)
+++ gcc/config/tilegx/tilegx.md	(working copy)
@@ -1799,13 +1799,16 @@
 
 (define_expand "clzsi2"
   [(set (match_dup 2)
-        (ashift:DI (match_operand:SI 1 "reg_or_0_operand" "")
+	(zero_extend:DI (match_operand:SI 1 "reg_or_0_operand" "")))
+   (set (match_dup 2)
+	(ashift:DI (match_dup 2)
                    (const_int 32)))
-   (set (subreg:DI (match_operand:SI 0 "register_operand" "") 0)
-	(clz:DI (match_dup 2)))]
+   (set (match_dup 2)
+	(clz:DI (match_dup 2)))
+   (set (match_operand:SI 0 "register_operand" "")
+	(subreg:SI (match_dup 2) 0))]
    ""
    {
-     operands[1] = simplify_gen_subreg (DImode, operands[1], SImode, 0);
      operands[2] = gen_reg_rtx (DImode);
    })