Disable Subzero IR generation for performance testing.

pydir/run-llvm2ice.py

Index: pydir/run-llvm2ice.py
diff --git a/pydir/run-llvm2ice.py b/pydir/run-llvm2ice.py
index 382467349861e675895f9efba867d06e13d7831a..d9f3c6312f23fe49215923e6d2f168dafaa58b67 100755
--- a/pydir/run-llvm2ice.py
+++ b/pydir/run-llvm2ice.py
@@ -47,6 +47,7 @@ def main():
                            action='store_true',
                            help='Trace command that generates ICE instructions')
     argparser.add_argument('--args', '-a', nargs=argparse.REMAINDER,
+                           default=[],
                            help='Remaining arguments are passed to llvm2ice')
 
     args = argparser.parse_args()
@@ -60,6 +61,13 @@ def main():
       raise RuntimeError("Can't specify both '--llvm-source' and " +
                          "'--no-local-syms'")
 
+    if '-noIRgen' in args.args or '--noIRgen' in args.args:

[jvoung (off chromium), 2014/11/05 23:55:08]

Is it possible to do:

%if ... --command %p2i ... | %if ... --command FileCheck ...

Otherwise we'll end up with these special short circuits within the p2i as well.

nit: not much of a fan of the capitalization within the flag "noIRgen" --
personally I prefer something like "no-ir-gen" , but I don't feel too
strongly...

[Karl, 2014/11/06 17:06:10]

Done and Done.

+      # Short circuit if not allowed by llvm2ice
+      atts_cmd = [args.llvm2ice, '--build-atts']
+      build_atts = shellcmd(atts_cmd, echo=False).split()
+      if 'no_disable_ir_gen' in build_atts:
+        return
+
     cmd = []
     if not args.llvm_source:
       cmd = [os.path.join(llvm_bin_path, 'llvm-as'), llfile, '-o', '-', '|',
@@ -78,8 +86,7 @@ def main():
       cmd += ['--build-on-read=0']
     else:
       cmd += ['--build-on-read=1']
-    if args.args:
-      cmd += args.args
+    cmd += args.args
     if args.llvm_source:
       cmd += [llfile]