RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-10-19 11:02:59 +02:00
Code Issues Projects Releases Wiki Activity

Fixup patch for revision rL316070.

Browse Source 
Added check that type of CmpConst and source type of trunc are equal
for correct matching of the case when we can set widened C constant
equal to CmpConstant.

  %cond = cmp iN %x, CmpConst
  %tr = trunc iN %x to iK
  %narrowsel = select i1 %cond, iK %t, iK C

Patch by: Gainullin, Artur <artur.gainullin@intel.com>

llvm-svn: 316082
This commit is contained in:
Nikolai Bozhenov 2017-10-18 14:24:50 +00:00
parent 70dfe93938
commit 8594937cc3
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
lib/Analysis/ValueTracking.cpp
View File

@ -4365,7 +4365,8 @@ static Value *lookThroughCast(CmpInst *CmpI, Value *V1, Value *V2,
break;
case Instruction::Trunc:
Constant *CmpConst;
if (match(CmpI->getOperand(1), m_Constant(CmpConst))) {
if (match(CmpI->getOperand(1), m_Constant(CmpConst)) &&
CmpConst->getType() == SrcTy) {
// Here we have the following case:
//
// %cond = cmp iN %x, CmpConst