From b48f904602ab60ea21f3c839e50c274b8a022beb Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Fri, 17 Sep 2010 20:06:27 +0000 Subject: Attempt to support platforms which don't have fenv.h. llvm-svn: 114196 --- llvm/lib/Analysis/ConstantFolding.cpp | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-) (limited to 'llvm/lib/Analysis') diff --git a/llvm/lib/Analysis/ConstantFolding.cpp b/llvm/lib/Analysis/ConstantFolding.cpp index 69581ba5ecd..c015231e1ba 100644 --- a/llvm/lib/Analysis/ConstantFolding.cpp +++ b/llvm/lib/Analysis/ConstantFolding.cpp @@ -30,6 +30,7 @@ #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/GetElementPtrTypeIterator.h" #include "llvm/Support/MathExtras.h" +#include "llvm/System/FEnv.h" #include #include #include @@ -1040,13 +1041,10 @@ llvm::canConstantFoldCallTo(const Function *F) { static Constant *ConstantFoldFP(double (*NativeFP)(double), double V, const Type *Ty) { - feclearexcept(FE_ALL_EXCEPT); - errno = 0; + sys::llvm_fenv_clearexcept(); V = NativeFP(V); - if (errno != 0 || - fetestexcept(FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)) { - feclearexcept(FE_ALL_EXCEPT); - errno = 0; + if (sys::llvm_fenv_testexcept()) { + sys::llvm_fenv_clearexcept(); return 0; } @@ -1060,13 +1058,10 @@ static Constant *ConstantFoldFP(double (*NativeFP)(double), double V, static Constant *ConstantFoldBinaryFP(double (*NativeFP)(double, double), double V, double W, const Type *Ty) { - feclearexcept(FE_ALL_EXCEPT); - errno = 0; + sys::llvm_fenv_clearexcept(); V = NativeFP(V, W); - if (errno != 0 || - fetestexcept(FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)) { - feclearexcept(FE_ALL_EXCEPT); - errno = 0; + if (sys::llvm_fenv_testexcept()) { + sys::llvm_fenv_clearexcept(); return 0; } -- cgit v1.2.3