Attachment 54142 Details for Bug 108166 – gcc13-pr108166.patch

[patch] gcc13-pr108166.patch

gcc13-pr108166.patch (text/plain), 1.30 KB, created by Jakub Jelinek on 2022-12-21 13:35:24 UTC

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Creator: Jakub Jelinek

Created: 2022-12-21 13:35:24 UTC

Size: 1.30 KB

patch

obsolete

>2022-12-21  Jakub Jelinek  <jakub@redhat.com>
>
>	PR tree-optimization/108166
>	* tree-ssa-phiopt.cc (value_replacement): For the maybe_equal_p
>	case turned into equal_p reset SSA_NAME_RANGE_INFO of phi result.
>
>	* g++.dg/torture/pr108166.C: New test.
>
>--- gcc/tree-ssa-phiopt.cc.jj	2022-10-28 11:00:53.970243821 +0200
>+++ gcc/tree-ssa-phiopt.cc	2022-12-21 14:27:58.118326548 +0100
>@@ -1491,6 +1491,12 @@ value_replacement (basic_block cond_bb,
> 		  default:
> 		    break;
> 		  }
>+	      if (equal_p)
>+		/* After the optimization PHI result can have value
>+		   which it couldn't have previously.
>+		   We could instead of resetting it union the range
>+		   info with oarg.  */
>+		reset_flow_sensitive_info (gimple_phi_result (phi));
> 	      if (equal_p && MAY_HAVE_DEBUG_BIND_STMTS)
> 		{
> 		  imm_use_iterator imm_iter;
>--- gcc/testsuite/g++.dg/torture/pr108166.C.jj	2022-12-21 14:31:02.638661322 +0100
>+++ gcc/testsuite/g++.dg/torture/pr108166.C	2022-12-21 14:30:45.441909725 +0100
>@@ -0,0 +1,26 @@
>+// PR tree-optimization/108166
>+// { dg-do run }
>+
>+bool a, b;
>+int d, c;
>+
>+const int &
>+foo (const int &f, const int &g)
>+{
>+  return !f ? f : g;
>+}
>+
>+__attribute__((noipa)) void
>+bar (int)
>+{
>+}
>+
>+int
>+main ()
>+{
>+  c = foo (b, 0) > ((b ? d : b) ?: 8);
>+  a = b ? d : b;
>+  bar (a);
>+  if (a != 0)
>+    __builtin_abort ();
>+}

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Attachments on bug 108166: 54142