commit ed55bcd9f869d7017be1cb403abd4de5c6361b30
author Dejan Mircevski <deki@google.com> Tue Jan 19 21:13:38 2016 -0500
committer Dejan Mircevski <deki@google.com> Tue Jan 19 21:18:14 2016 -0500
tree 389fe9076dd2139907b35d224fd0033244ab6fbe
parent 33782795d9c3db2703d2cdbf1637ef320e4028d3

Don't remove SPIR-V blocks before codegen.

A removed block releases its instructions, so Module::idToInstruction
suddenly contains dangling references.  The original motivation for
block removal was to skip some unreachable blocks, but that's already
achieved by InReadableOrder.cpp.

Also updated stale comments.

Test/baseResults/spv.for-notest.vert.out

diff --git a/Test/baseResults/spv.for-notest.vert.out b/Test/baseResults/spv.for-notest.vert.out
index 0b77cb1..b2618c1 100644
--- a/Test/baseResults/spv.for-notest.vert.out
+++ b/Test/baseResults/spv.for-notest.vert.out
@@ -50,4 +50,6 @@
               19:      6(int) IAdd 17 18
                               Store 8(i) 19
                               Branch 10
+              12:             Label
+                              Return
                               FunctionEnd