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llvm-mirror/lib/Transforms
Chandler Carruth 517e7a4d9e Replace the ad-hoc hashing in GVN with the new hashing infrastructure.
This implicitly fixes a nasty bug in the GVN hashing (that thankfully
could only manifest as a performance bug): actually include the opcode
in the hash. The old code started the hash off with the opcode, but then
overwrote it with the type pointer.

Since this is likely to be pretty hot (GVN being already pretty
expensive) I've included a micro-optimization to just not bother with
the varargs hashing if they aren't present. I can't measure any change
in GVN performance due to this, even with a big test case like Duncan's
sqlite one. Everything I see is in the noise floor. That said, this
closes a loop hole for a potential scaling problem due to collisions if
the opcode were the differentiating aspect of the expression.

llvm-svn: 152025
2012-03-05 11:29:54 +00:00
..
Hello Since the Hello pass is built as a loadable dynamic library, don't try to convert it to new-style registration yet. 2010-10-07 00:31:16 +00:00
InstCombine Restrict this transformation to equality conditions. 2012-02-29 01:46:50 +00:00
Instrumentation ASan: use getTypeAllocSize instead of getTypeStoreSize. 2012-03-02 10:41:08 +00:00
IPO Plog a memleak in GlobalOpt. 2012-02-27 12:48:24 +00:00
Scalar Replace the ad-hoc hashing in GVN with the new hashing infrastructure. 2012-03-05 11:29:54 +00:00
Utils Add support for disabling llvm.lifetime intrinsics in the AlwaysInliner. These 2012-02-25 02:56:01 +00:00
Vectorize Update BBVectorize to use aliasesUnknownInst. 2012-02-10 15:52:40 +00:00
CMakeLists.txt Add a basic-block autovectorization pass. 2012-02-01 03:51:43 +00:00
LLVMBuild.txt Add a basic-block autovectorization pass. 2012-02-01 03:51:43 +00:00
Makefile Add a basic-block autovectorization pass. 2012-02-01 03:51:43 +00:00