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8 Commits

Author SHA1 Message Date
Benjamin Kramer 8bcc971174 Make MemoryBuiltins aware of TargetLibraryInfo. 
This disables malloc-specific optimization when -fno-builtin (or -ffreestanding)
is specified. This has been a problem for a long time but became more severe
with the recent memory builtin improvements.

Since the memory builtin functions are used everywhere, this required passing
TLI in many places. This means that functions that now have an optional TLI
argument, like RecursivelyDeleteTriviallyDeadFunctions, won't remove dead
mallocs anymore if the TLI argument is missing. I've updated most passes to do
the right thing.

Fixes PR13694 and probably others.

llvm-svn: 162841
 2012-08-29 15:32:21 +00:00
Chad Rosier c24b86ffbe Propagate TargetLibraryInfo throughout ConstantFolding.cpp and 
InstructionSimplify.cpp.  Other fixups as needed.
Part of rdar://10500969

llvm-svn: 145559
 2011-12-01 03:08:23 +00:00
Duncan Sands 697de77339 Speed up instsimplify by about 10-15% by not bothering to retry 
InstructionSimplify on instructions that didn't change since the
last time round the loop.

llvm-svn: 122745
 2011-01-03 10:50:04 +00:00
Duncan Sands 2c440fa403 Simplify this pass by using a depth-first iterator to ensure that all 
operands are visited before the instructions themselves.

llvm-svn: 122647
 2010-12-31 17:49:05 +00:00
Duncan Sands 6cc7126ed9 Zap dead instructions harder. 
llvm-svn: 122645
 2010-12-31 16:17:54 +00:00
Duncan Sands 3b8af41a3e Visit instructions deterministically. Use a FIFO so as to approximately 
visit instructions before their uses, since InstructionSimplify does a
better job in that case.  All this prompted by Frits van Bommel.

llvm-svn: 122343
 2010-12-21 17:08:55 +00:00
Duncan Sands e7cbb64ec0 If an instruction simplifies, try again to simplify any uses of it. This is 
not very important since the pass is only used for testing, but it does make
it more realistic.  Suggested by Frits van Bommel.

llvm-svn: 122336
 2010-12-21 16:12:03 +00:00
Duncan Sands eaff500c7b Oops, forgot to add the pass itself! 
llvm-svn: 122265
 2010-12-20 21:07:42 +00:00