From: Jakub Jelinek <jakub@redhat.com>
Date: Wed, 3 Apr 2013 18:00:52 +0000 (+0200)
Subject: backport: re PR middle-end/55921 (Crash in verify_ssa for asm to side-steps complex... 
X-Git-Tag: releases/gcc-4.6.4~66
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b4de1dd6f5530913c4caf9c0f1404d9c507b0038;p=thirdparty%2Fgcc.git

backport: re PR middle-end/55921 (Crash in verify_ssa for asm to side-steps complex pessimization)

	Backported from mainline
	2013-01-10  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/55921
	* tree-complex.c (expand_complex_asm): New function.
	(expand_complex_operations_1): Call it for GIMPLE_ASM.

From-SVN: r197446
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4c49df5801bd..5cc55c15b1c3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,12 @@
 2013-04-03  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	2013-01-10  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/55921
+	* tree-complex.c (expand_complex_asm): New function.
+	(expand_complex_operations_1): Call it for GIMPLE_ASM.
+
 	2012-09-05  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/54486
diff --git a/gcc/tree-complex.c b/gcc/tree-complex.c
index ec2b438ca47c..58ac7633a1a0 100644
--- a/gcc/tree-complex.c
+++ b/gcc/tree-complex.c
@@ -1400,6 +1400,36 @@ expand_complex_comparison (gimple_stmt_iterator *gsi, tree ar, tree ai,
   update_stmt (stmt);
 }
 
+/* Expand inline asm that sets some complex SSA_NAMEs.  */
+
+static void
+expand_complex_asm (gimple_stmt_iterator *gsi)
+{
+  gimple stmt = gsi_stmt (*gsi);
+  unsigned int i;
+
+  for (i = 0; i < gimple_asm_noutputs (stmt); ++i)
+    {
+      tree link = gimple_asm_output_op (stmt, i);
+      tree op = TREE_VALUE (link);
+      if (TREE_CODE (op) == SSA_NAME
+	  && TREE_CODE (TREE_TYPE (op)) == COMPLEX_TYPE)
+	{
+	  tree type = TREE_TYPE (op);
+	  tree inner_type = TREE_TYPE (type);
+	  tree r = build1 (REALPART_EXPR, inner_type, op);
+	  tree i = build1 (IMAGPART_EXPR, inner_type, op);
+	  gimple_seq list = set_component_ssa_name (op, false, r);
+
+	  if (list)
+	    gsi_insert_seq_after (gsi, list, GSI_CONTINUE_LINKING);
+
+	  list = set_component_ssa_name (op, true, i);
+	  if (list)
+	    gsi_insert_seq_after (gsi, list, GSI_CONTINUE_LINKING);
+	}
+    }
+}
 
 /* Process one statement.  If we identify a complex operation, expand it.  */
 
@@ -1412,6 +1442,12 @@ expand_complex_operations_1 (gimple_stmt_iterator *gsi)
   complex_lattice_t al, bl;
   enum tree_code code;
 
+  if (gimple_code (stmt) == GIMPLE_ASM)
+    {
+      expand_complex_asm (gsi);
+      return;
+    }
+
   lhs = gimple_get_lhs (stmt);
   if (!lhs && gimple_code (stmt) != GIMPLE_COND)
     return;