[llvm-commits] [dragonegg] r95660 - /dragonegg/trunk/llvm-backend.cpp

[Duncan Sands]

Author: baldrick
Date: Tue Feb  9 09:28:04 2010
New Revision: 95660

URL: http://llvm.org/viewvc/llvm-project?rev=95660&view=rev
Log:
Disable all of the GCC passes that are only run after we have already
converted the gimple to LLVM IR.  This includes most optimization passes.

Modified:
    dragonegg/trunk/llvm-backend.cpp

Modified: dragonegg/trunk/llvm-backend.cpp
URL: http://llvm.org/viewvc/llvm-project/dragonegg/trunk/llvm-backend.cpp?rev=95660&r1=95659&r2=95660&view=diff

==============================================================================
--- dragonegg/trunk/llvm-backend.cpp (original)
+++ dragonegg/trunk/llvm-backend.cpp Tue Feb  9 09:28:04 2010
@@ -2354,13 +2354,6 @@
     pass_info.ref_pass_instance_number = 0;
     pass_info.pos_op = PASS_POS_REPLACE;
     register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
-
-    // Turn off pass_all_optimizations.
-    pass_info.pass = &pass_gimple_null.pass;
-    pass_info.reference_pass_name = "*all_optimizations";
-    pass_info.ref_pass_instance_number = 0;
-    pass_info.pos_op = PASS_POS_REPLACE;
-    register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
   }
 
   // Replace LTO generation with gimple to LLVM conversion.
@@ -2376,13 +2369,76 @@
   pass_info.pos_op = PASS_POS_REPLACE;
   register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
 
-  // Turn off all LTO passes.
+  // Disable any other LTO passes.
   pass_info.pass = &pass_ipa_null.pass;
   pass_info.reference_pass_name = "lto_wpa_fixup";
   pass_info.ref_pass_instance_number = 0;
   pass_info.pos_op = PASS_POS_REPLACE;
   register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
 
+  // Disable pass_lower_eh_dispatch, which runs after LLVM conversion.
+  pass_info.pass = &pass_gimple_null.pass;
+  pass_info.reference_pass_name = "ehdisp";
+  pass_info.ref_pass_instance_number = 0;
+  pass_info.pos_op = PASS_POS_REPLACE;
+  register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
+
+  // Disable pass_all_optimizations, which runs after LLVM conversion.
+  pass_info.pass = &pass_gimple_null.pass;
+  pass_info.reference_pass_name = "*all_optimizations";
+  pass_info.ref_pass_instance_number = 0;
+  pass_info.pos_op = PASS_POS_REPLACE;
+  register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
+
+  // Disable pass_lower_complex_O0, which runs after LLVM conversion.
+  pass_info.pass = &pass_gimple_null.pass;
+  pass_info.reference_pass_name = "cplxlower0";
+  pass_info.ref_pass_instance_number = 0;
+  pass_info.pos_op = PASS_POS_REPLACE;
+  register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
+
+  // Disable pass_cleanup_eh, which runs after LLVM conversion.
+  // NOTE: This pass is scheduled twice, once before LLVM conversion and once
+  // after.  If GCC optimizations are enabled, then we should only disable the
+  // second instance, but there doesn't seem to be any convenient and reliable
+  // way of doing this.  FIXME: The following code actually only disables the
+  // first instance due to a GCC bug!
+  pass_info.pass = &pass_gimple_null.pass;
+  pass_info.reference_pass_name = "ehcleanup";
+  pass_info.ref_pass_instance_number = 0;
+  pass_info.pos_op = PASS_POS_REPLACE;
+  register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
+
+  // Disable pass_lower_resx, which runs after LLVM conversion.
+  pass_info.pass = &pass_gimple_null.pass;
+  pass_info.reference_pass_name = "resx";
+  pass_info.ref_pass_instance_number = 0;
+  pass_info.pos_op = PASS_POS_REPLACE;
+  register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
+
+  // Disable pass_nrv, which runs after LLVM conversion.
+  pass_info.pass = &pass_gimple_null.pass;
+  pass_info.reference_pass_name = "nrv";
+  pass_info.ref_pass_instance_number = 0;
+  pass_info.pos_op = PASS_POS_REPLACE;
+  register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
+
+  // Disable pass_mudflap_2, which runs after LLVM conversion.
+  pass_info.pass = &pass_gimple_null.pass;
+  pass_info.reference_pass_name = "mudflap2";
+  pass_info.ref_pass_instance_number = 0;
+  pass_info.pos_op = PASS_POS_REPLACE;
+  register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
+
+  // Disable pass_cleanup_cfg_post_optimizing, which runs after LLVM conversion.
+  pass_info.pass = &pass_gimple_null.pass;
+  pass_info.reference_pass_name = "optimized";
+  pass_info.ref_pass_instance_number = 0;
+  pass_info.pos_op = PASS_POS_REPLACE;
+  register_callback (plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
+
+  // TODO: Disable pass_warn_function_noreturn?
+
   // Replace rtl expansion with a pass that pretends to codegen functions, but
   // actually only does the hoop jumping that GCC requires at this point.
   pass_info.pass = &pass_disable_rtl.pass;