[PATCH] Canonicalize addrspacecast ConstExpr between different pointer types

[Mark Heffernan]

Couple nits.  Otherwise LGTM.

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Comment at: test/CodeGen/NVPTX/access-non-generic.ll:78
@@ -79,1 +77,3 @@
+; When hoisting an addrspacecast between different pointer types, replace the
+; addrspacecast with a bitcsat.
 define i32 @ld_int_from_float() {
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spelling nit: bitcast.

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Comment at: test/CodeGen/NVPTX/access-non-generic.ll:81
@@ -80,3 +80,3 @@
 ; IR-LABEL: @ld_int_from_float
-; IR: addrspacecast
+; IR: bitcast
 ; PTX-LABEL: ld_int_from_float(
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Is there also an addrspacecast that you could/should check for?  It's more of a question than a request.

http://reviews.llvm.org/D4138