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Though the previous xform applies to literally dozens (hundreds?) of variables

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in SPEC, the subsequent optimziations that we are after don't play with
with FP values, so disable this xform for them.  Really we just don't want
stuff like:

double G;   (always 0 or 412312.312)
  = G;

turning into:

bool G_b;
  = G_b ? 412312.312 : 0;

We'd rather just do the load.

-Chris


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18819 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-12-12 06:03:06 +00:00
parent 6a8c46cde3
commit 077f1a8292
1 changed files with 2 additions and 1 deletions
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3
lib/Transforms/IPO/GlobalOpt.cpp
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@ -954,7 +954,8 @@ bool GlobalOpt::ProcessInternalGlobal(GlobalVariable *GV,
// Otherwise, if the global was not a boolean, we can shrink it to be a
// boolean.
if (Constant *SOVConstant = dyn_cast<Constant>(GS.StoredOnceValue))
if (GV->getType()->getElementType() != Type::BoolTy) {
if (GV->getType()->getElementType() != Type::BoolTy &&
!GV->getType()->getElementType()->isFloatingPoint()) {
DEBUG(std::cerr << " *** SHRINKING TO BOOL: " << *GV);
ShrinkGlobalToBoolean(GV, SOVConstant);
++NumShrunkToBool;