Sanjay Patel cd7e1731c1 [CVP] simplify phi with constant incoming values that match common variable edge values ...

This is based on an example that was recently posted on llvm-dev:

void *propagate_null(void* b, int* g) {
  if (!b) {
    return 0;
  }
  (*g)++;
  return b;
}

https://godbolt.org/g/xYk3qG

The original code or constant propagation in other passes has obscured the fact 
that the phi can be removed completely.

Differential Revision: https://reviews.llvm.org/D45448

llvm-svn: 329755

2018-04-10 20:42:39 +00:00

..

2010-09-02-Trunc.ll

…

2010-09-26-MergeConstantRange.ll

…

add.ll

[CVP] Process binary operations even when def is local

2017-10-12 22:39:52 +00:00

alloca.ll

Add address space mangling to lifetime intrinsics

2017-04-10 20:18:21 +00:00

ashr.ll

[CVP] Process binary operations even when def is local

2017-10-12 22:39:52 +00:00

basic.ll

[IR] Make SwitchInst::CaseIt almost a normal iterator.

2017-03-26 02:49:23 +00:00

conflict.ll

Revert @llvm.assume with operator bundles (r289755-r289757)

2016-12-19 08:22:17 +00:00

crash.ll

[LVI] Fix potential memory corruption in getValueFromCondition

2016-08-12 15:08:15 +00:00

guards.ll

[LVI] Fix a bug with a guard being the very first instruction in a BB not taken into account

2016-10-21 15:02:21 +00:00

icmp.ll

…

non-null.ll

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

overflows.ll

[CVP] Remove some {s|u}sub.with.overflow checks.

2017-12-05 18:14:24 +00:00

phi-common-val.ll

[CVP] simplify phi with constant incoming values that match common variable edge values

2018-04-10 20:42:39 +00:00

pr35807.ll

[CVP] Don't Replace incoming values from unreachable blocks with undef.

2018-01-29 05:59:55 +00:00

range.ll

[LVI] Constant-propagate a zero extension of the switch condition value through case edges

2017-08-03 21:11:30 +00:00

sdiv.ll

[CVP] Process binary operations even when def is local

2017-10-12 22:39:52 +00:00

select.ll

…

srem.ll

[CVP] Process binary operations even when def is local

2017-10-12 22:39:52 +00:00

udiv.ll

Re-re-land: Teach CorrelatedValuePropagation to reduce the width of udiv/urem instructions.

2018-03-21 14:08:21 +00:00

urem.ll

Re-re-land: Teach CorrelatedValuePropagation to reduce the width of udiv/urem instructions.

2018-03-21 14:08:21 +00:00