From: Richard Biener <rguenther@suse.de>
Date: Mon, 26 Jun 2023 09:21:43 +0000 (+0200)
Subject: tree-optimization/110392 - ICE with predicate analysis
X-Git-Tag: basepoints/gcc-15~8050
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ab6eac20f00761695c69b555f6b0a026bc25770d;p=thirdparty%2Fgcc.git

tree-optimization/110392 - ICE with predicate analysis

Feeding not optimized IL can result in predicate normalization
to simplify things so a predicate can get true or false.  The
following re-orders the early exit in that case to come after
simplification and normalization to take care of that.

	PR tree-optimization/110392
	* gimple-predicate-analysis.cc (uninit_analysis::is_use_guarded):
	Do early exits on true/false predicate only after normalization.
---

diff --git a/gcc/gimple-predicate-analysis.cc b/gcc/gimple-predicate-analysis.cc
index 7f20f81ad863..373163ba9c80 100644
--- a/gcc/gimple-predicate-analysis.cc
+++ b/gcc/gimple-predicate-analysis.cc
@@ -2216,11 +2216,11 @@ uninit_analysis::is_use_guarded (gimple *use_stmt, basic_block use_bb,
     return false;
 
   use_preds.simplify (use_stmt, /*is_use=*/true);
+  use_preds.normalize (use_stmt, /*is_use=*/true);
   if (use_preds.is_false ())
     return true;
   if (use_preds.is_true ())
     return false;
-  use_preds.normalize (use_stmt, /*is_use=*/true);
 
   /* Try to prune the dead incoming phi edges.  */
   if (!overlap (phi, opnds, visited, use_preds))
@@ -2238,11 +2238,11 @@ uninit_analysis::is_use_guarded (gimple *use_stmt, basic_block use_bb,
 	return false;
 
       m_phi_def_preds.simplify (phi);
+      m_phi_def_preds.normalize (phi);
       if (m_phi_def_preds.is_false ())
 	return false;
       if (m_phi_def_preds.is_true ())
 	return true;
-      m_phi_def_preds.normalize (phi);
     }
 
   /* Return true if the predicate guarding the valid definition (i.e.,