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3ef1aae2b5
llvm-6502/test/Transforms
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Hal Finkel 3ef1aae2b5 Make use of @llvm.assume from LazyValueInfo 
This change teaches LazyValueInfo to use the @llvm.assume intrinsic. Like with
the known-bits change (r217342), this requires feeding a "context" instruction
pointer through many functions. Aside from a little refactoring to reuse the
logic that turns predicates into constant ranges in LVI, the only new code is
that which can 'merge' the range from an assumption into that otherwise
computed. There is also a small addition to JumpThreading so that it can have
LVI use assumptions in the same block as the comparison feeding a conditional
branch.

With this patch, we can now simplify this as expected:
int foo(int a) {
  __builtin_assume(a > 5);
  if (a > 3) {
    bar();
    return 1;
  }
  return 0;
}

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217345 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-07 20:29:59 +00:00
..
ADCE
AddDiscriminators Use DILexicalBlockFile, rather than DILexicalBlock, to track discriminator changes to ensure discriminator changes don't introduce new DWARF DW_TAG_lexical_blocks. 2014-08-21 22:45:21 +00:00
AlignmentFromAssumptions Add an AlignmentFromAssumptions Pass 2014-09-07 20:05:11 +00:00
ArgumentPromotion Don't promote byval pointer arguments when padding matters 2014-08-28 22:42:00 +00:00
AtomicExpand/ARM Use target-dependent emitLeading/TrailingFence instead of the target-independent insertLeading/TrailingFence (in AtomicExpandPass) 2014-09-03 21:01:03 +00:00
BBVectorize Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
BranchFolding
CodeExtractor
CodeGenPrepare CodeGenPrep: fall back to MVT::Other if instruction's type isn't an EVT. 2014-07-29 10:20:22 +00:00
ConstantHoisting [ConstantHoisting][X86] Improve the cost model for small constants with large types (i64 and above). 2014-06-10 00:32:29 +00:00
ConstantMerge
ConstProp Fix a bug around truncating vector in const prop. 2014-08-21 02:12:35 +00:00
CorrelatedValuePropagation
DeadArgElim musttail: Don't eliminate varargs packs if there is a forwarding call 2014-08-26 00:59:51 +00:00
DeadStoreElimination Relax the constraint more in MemoryDependencyAnalysis.cpp 2014-08-29 20:32:58 +00:00
DebugIR
EarlyCSE
FunctionAttrs [optnone] Make the optnone attribute effective at suppressing function 2014-08-13 10:49:33 +00:00
GCOVProfiling Fix coverage for files with global constructors again. Adds a testcase to the commit from r206671, as requested by David Blaikie. 2014-06-05 04:31:43 +00:00
GlobalDCE Remove dangling initializers in GlobalDCE 2014-08-25 17:51:14 +00:00
GlobalOpt GlobalOpt: Optimize in the face of insertvalue/extractvalue 2014-08-08 05:50:43 +00:00
GVN Relax the constraint more in MemoryDependencyAnalysis.cpp 2014-08-29 20:32:58 +00:00
IndVarSimplify IndVarSimplify: Don't let LFTR compare against a poison value 2014-09-03 23:03:18 +00:00
Inline Add functions for finding ephemeral values 2014-09-07 13:49:57 +00:00
InstCombine Add additional patterns for @llvm.assume in ValueTracking 2014-09-07 19:21:07 +00:00
InstMerge MergedLoadStoreMotion pass 2014-07-18 19:13:09 +00:00
InstSimplify Revert: [APFloat] Fixed a bug in method 'fusedMultiplyAdd'. 2014-09-02 17:22:49 +00:00
Internalize Use "weak alias" instead of "alias weak" 2014-07-30 22:51:54 +00:00
IPConstantProp
JumpThreading Make use of @llvm.assume from LazyValueInfo 2014-09-07 20:29:59 +00:00
LCSSA
LICM LICM: Don't crash when an instruction is used by an unreachable BB 2014-09-02 16:22:00 +00:00
LoadCombine
LoopDeletion
LoopIdiom R600: Implement TTI:getPopcntSupport 2014-07-18 06:07:13 +00:00
LoopReroll
LoopRotate
LoopSimplify
LoopStrengthReduce Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
LoopUnroll Add functions for finding ephemeral values 2014-09-07 13:49:57 +00:00
LoopUnswitch
LoopVectorize Add a convenience method to copy wrapping, exact, and fast-math flags (NFC). 2014-09-01 18:44:57 +00:00
LowerAtomic IR: add "cmpxchg weak" variant to support permitted failure. 2014-06-13 14:24:07 +00:00
LowerExpectIntrinsic
LowerInvoke
LowerSwitch Added test for commit r212802 that was missing 2014-07-11 10:36:00 +00:00
Mem2Reg
MemCpyOpt Fix a really bad miscompile introduced in r216865 - the else-if logic 2014-09-01 10:09:18 +00:00
MergeFunc Fix crash when looking up the addrspace of GEPs with vector types 2014-09-02 18:47:54 +00:00
MetaRenamer Use "weak alias" instead of "alias weak" 2014-07-30 22:51:54 +00:00
ObjCARC
PartiallyInlineLibCalls PartiallyInlineLibCalls: Check sqrt result type before transforming it. 2014-08-01 23:21:21 +00:00
PhaseOrdering
PruneEH
Reassociate Reassociate x + -0.1234 * y into x - 0.1234 * y 2014-08-21 10:45:30 +00:00
Reg2Mem
SampleProfile Use DILexicalBlockFile, rather than DILexicalBlock, to track discriminator changes to ensure discriminator changes don't introduce new DWARF DW_TAG_lexical_blocks. 2014-08-21 22:45:21 +00:00
Scalarizer
ScalarRepl
SCCP SCCP: update for cmpxchg returning { iN, i1 } now. 2014-06-13 14:54:09 +00:00
SeparateConstOffsetFromGEP/NVPTX Partially revert r210444 due to performance regression 2014-07-16 23:25:00 +00:00
SimplifyCFG Make fabs safe to speculatively execute 2014-08-29 16:01:17 +00:00
Sink
SLPVectorizer Preserve IR flags (nsw, nuw, exact, fast-math) in SLP vectorizer (PR20802). 2014-09-03 17:40:30 +00:00
SROA SROA: Don't insert instructions before a PHI 2014-09-01 21:20:14 +00:00
StripSymbols
StructurizeCFG
TailCallElim We may visit a call that uses an alloca multiple times in callUsesLocalStack, sometimes with IsNocapture true and sometimes with IsNocapture false. We accidentally skipped work we needed to do in the IsNocapture=false case if we were called with IsNocapture=true the first time. Fixes PR20405! 2014-07-23 06:24:49 +00:00
TailDup Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
Util utils: Fix segfault in flattencfg 2014-08-13 20:31:53 +00:00