nicolas/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Enable constant propagation for more math functions

Browse Source 
Constant propagation for single precision math functions (such as
tanf) is already working, but was not enabled. This patch enables
these for many single-precision functions, and adds respective test
cases.

Newly handled functions: acosf asinf atanf atan2f ceilf coshf expf
exp2f fabsf floorf fmodf logf log10f powf sinhf tanf tanhf

llvm-svn: 246186
This commit is contained in:
Erik Schnetter
2015-08-27 18:56:23 +00:00
parent a9248a2696
commit 05845d31c9
2 changed files with 734 additions and 80 deletions
Download Patch File Download Diff File Expand all files Collapse all files

92
llvm/lib/Analysis/ConstantFolding.cpp
View File

@@ -1282,24 +1282,30 @@ bool llvm::canConstantFoldCallTo(const Function *F) {
// return true for a name like "cos\0blah" which strcmp would return equal to
// "cos", but has length 8.
switch (Name[0]) {
default: return false;
default:
return false;
case 'a':
return Name == "acos" || Name == "asin" || Name == "atan" || Name =="atan2";
return Name == "acos" || Name == "asin" || Name == "atan" ||
Name == "atan2" || Name == "acosf" || Name == "asinf" ||
Name == "atanf" || Name == "atan2f";
case 'c':
return Name == "cos" || Name == "ceil" || Name == "cosf" || Name == "cosh";
return Name == "ceil" || Name == "cos" || Name == "cosh" ||
Name == "ceilf" || Name == "cosf" || Name == "coshf";
case 'e':
return Name == "exp" || Name == "exp2";
return Name == "exp" || Name == "exp2" || Name == "expf" || Name == "exp2f";
case 'f':
return Name == "fabs" || Name == "fmod" || Name == "floor";
return Name == "fabs" || Name == "floor" || Name == "fmod" ||
Name == "fabsf" || Name == "floorf" || Name == "fmodf";
case 'l':
return Name == "log" || Name == "log10";
return Name == "log" || Name == "log10" || Name == "logf" ||
Name == "log10f";
case 'p':
return Name == "pow";
return Name == "pow" || Name == "powf";
case 's':
return Name == "sin" || Name == "sinh" || Name == "sqrt" ||
Name == "sinf" || Name == "sqrtf";
Name == "sinf" || Name == "sinhf" || Name == "sqrtf";
case 't':
return Name == "tan" || Name == "tanh";
return Name == "tan" || Name == "tanh" || Name == "tanf" || Name == "tanhf";
}
}
@@ -1495,43 +1501,51 @@ static Constant *ConstantFoldScalarCall(StringRef Name, unsigned IntrinsicID,
switch (Name[0]) {
case 'a':
if (Name == "acos" && TLI->has(LibFunc::acos))
if ((Name == "acos" && TLI->has(LibFunc::acos)) ||
(Name == "acosf" && TLI->has(LibFunc::acosf)))
return ConstantFoldFP(acos, V, Ty);
else if (Name == "asin" && TLI->has(LibFunc::asin))
else if ((Name == "asin" && TLI->has(LibFunc::asin)) ||
(Name == "asinf" && TLI->has(LibFunc::asinf)))
return ConstantFoldFP(asin, V, Ty);
else if (Name == "atan" && TLI->has(LibFunc::atan))
else if ((Name == "atan" && TLI->has(LibFunc::atan)) ||
(Name == "atanf" && TLI->has(LibFunc::atanf)))
return ConstantFoldFP(atan, V, Ty);
break;
case 'c':
if (Name == "ceil" && TLI->has(LibFunc::ceil))
if ((Name == "ceil" && TLI->has(LibFunc::ceil)) ||
(Name == "ceilf" && TLI->has(LibFunc::ceilf)))
return ConstantFoldFP(ceil, V, Ty);
else if (Name == "cos" && TLI->has(LibFunc::cos))
else if ((Name == "cos" && TLI->has(LibFunc::cos)) ||
(Name == "cosf" && TLI->has(LibFunc::cosf)))
return ConstantFoldFP(cos, V, Ty);
else if (Name == "cosh" && TLI->has(LibFunc::cosh))
else if ((Name == "cosh" && TLI->has(LibFunc::cosh)) ||
(Name == "coshf" && TLI->has(LibFunc::coshf)))
return ConstantFoldFP(cosh, V, Ty);
else if (Name == "cosf" && TLI->has(LibFunc::cosf))
return ConstantFoldFP(cos, V, Ty);
break;
case 'e':
if (Name == "exp" && TLI->has(LibFunc::exp))
if ((Name == "exp" && TLI->has(LibFunc::exp)) ||
(Name == "expf" && TLI->has(LibFunc::expf)))
return ConstantFoldFP(exp, V, Ty);
if (Name == "exp2" && TLI->has(LibFunc::exp2)) {
if ((Name == "exp2" && TLI->has(LibFunc::exp2)) ||
(Name == "exp2f" && TLI->has(LibFunc::exp2f)))
// Constant fold exp2(x) as pow(2,x) in case the host doesn't have a
// C99 library.
return ConstantFoldBinaryFP(pow, 2.0, V, Ty);
}
break;
case 'f':
if (Name == "fabs" && TLI->has(LibFunc::fabs))
if ((Name == "fabs" && TLI->has(LibFunc::fabs)) ||
(Name == "fabsf" && TLI->has(LibFunc::fabsf)))
return ConstantFoldFP(fabs, V, Ty);
else if (Name == "floor" && TLI->has(LibFunc::floor))
else if ((Name == "floor" && TLI->has(LibFunc::floor)) ||
(Name == "floorf" && TLI->has(LibFunc::floorf)))
return ConstantFoldFP(floor, V, Ty);
break;
case 'l':
if (Name == "log" && V > 0 && TLI->has(LibFunc::log))
if ((Name == "log" && V > 0 && TLI->has(LibFunc::log)) ||
(Name == "logf" && V > 0 && TLI->has(LibFunc::logf)))
return ConstantFoldFP(log, V, Ty);
else if (Name == "log10" && V > 0 && TLI->has(LibFunc::log10))
else if ((Name == "log10" && V > 0 && TLI->has(LibFunc::log10)) ||
(Name == "log10f" && V > 0 && TLI->has(LibFunc::log10f)))
return ConstantFoldFP(log10, V, Ty);
else if (IntrinsicID == Intrinsic::sqrt &&
(Ty->isHalfTy() || Ty->isFloatTy() || Ty->isDoubleTy())) {
@@ -1548,21 +1562,22 @@ static Constant *ConstantFoldScalarCall(StringRef Name, unsigned IntrinsicID,
}
break;
case 's':
if (Name == "sin" && TLI->has(LibFunc::sin))
if ((Name == "sin" && TLI->has(LibFunc::sin)) ||
(Name == "sinf" && TLI->has(LibFunc::sinf)))
return ConstantFoldFP(sin, V, Ty);
else if (Name == "sinh" && TLI->has(LibFunc::sinh))
else if ((Name == "sinh" && TLI->has(LibFunc::sinh)) ||
(Name == "sinhf" && TLI->has(LibFunc::sinhf)))
return ConstantFoldFP(sinh, V, Ty);
else if (Name == "sqrt" && V >= 0 && TLI->has(LibFunc::sqrt))
else if ((Name == "sqrt" && V >= 0 && TLI->has(LibFunc::sqrt)) ||
(Name == "sqrtf" && V >= 0 && TLI->has(LibFunc::sqrtf)))
return ConstantFoldFP(sqrt, V, Ty);
else if (Name == "sqrtf" && V >= 0 && TLI->has(LibFunc::sqrtf))
return ConstantFoldFP(sqrt, V, Ty);
else if (Name == "sinf" && TLI->has(LibFunc::sinf))
return ConstantFoldFP(sin, V, Ty);
break;
case 't':
if (Name == "tan" && TLI->has(LibFunc::tan))
if ((Name == "tan" && TLI->has(LibFunc::tan)) ||
(Name == "tanf" && TLI->has(LibFunc::tanf)))
return ConstantFoldFP(tan, V, Ty);
else if (Name == "tanh" && TLI->has(LibFunc::tanh))
else if ((Name == "tanh" && TLI->has(LibFunc::tanh)) ||
(Name == "tanhf" && TLI->has(LibFunc::tanhf)))
return ConstantFoldFP(tanh, V, Ty);
break;
default:
@@ -1665,11 +1680,14 @@ static Constant *ConstantFoldScalarCall(StringRef Name, unsigned IntrinsicID,
if (!TLI)
return nullptr;
if (Name == "pow" && TLI->has(LibFunc::pow))
if ((Name == "pow" && TLI->has(LibFunc::pow)) ||
(Name == "powf" && TLI->has(LibFunc::powf)))
return ConstantFoldBinaryFP(pow, Op1V, Op2V, Ty);
if (Name == "fmod" && TLI->has(LibFunc::fmod))
if ((Name == "fmod" && TLI->has(LibFunc::fmod)) ||
(Name == "fmodf" && TLI->has(LibFunc::fmodf)))
return ConstantFoldBinaryFP(fmod, Op1V, Op2V, Ty);
if (Name == "atan2" && TLI->has(LibFunc::atan2))
if ((Name == "atan2" && TLI->has(LibFunc::atan2)) ||
(Name == "atan2f" && TLI->has(LibFunc::atan2f)))
return ConstantFoldBinaryFP(atan2, Op1V, Op2V, Ty);
} else if (ConstantInt *Op2C = dyn_cast<ConstantInt>(Operands[1])) {
if (IntrinsicID == Intrinsic::powi && Ty->isHalfTy())