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Make APFloat constructor require explicit semantics.

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Previously we tried to infer it from the bit width size, with an added
IsIEEE argument for the PPC/IEEE 128-bit case, which had a default
value. This default value allowed bugs to creep in, where it was
inappropriate.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173138 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tim Northover
2013-01-22 09:46:31 +00:00
parent dc89ed7da3
commit 0a29cb0454
17 changed files with 159 additions and 102 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/llvm/ADT/APFloat.h
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@@ -184,9 +184,9 @@ namespace llvm {
APFloat(const fltSemantics &, integerPart);
APFloat(const fltSemantics &, fltCategory, bool negative);
APFloat(const fltSemantics &, uninitializedTag);
APFloat(const fltSemantics &, const APInt &);
explicit APFloat(double d);
explicit APFloat(float f);
explicit APFloat(const APInt &, bool isIEEE = false);
APFloat(const APFloat &);
~APFloat();
@@ -423,7 +423,7 @@ namespace llvm {
APInt convertQuadrupleAPFloatToAPInt() const;
APInt convertF80LongDoubleAPFloatToAPInt() const;
APInt convertPPCDoubleDoubleAPFloatToAPInt() const;
void initFromAPInt(const APInt& api, bool isIEEE = false);
void initFromAPInt(const fltSemantics *Sem, const APInt& api);
void initFromHalfAPInt(const APInt& api);
void initFromFloatAPInt(const APInt& api);
void initFromDoubleAPInt(const APInt& api);

14
include/llvm/CodeGen/SelectionDAG.h
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@@ -935,6 +935,20 @@ public:
}
}
/// Returns an APFloat semantics tag appropriate for the given type. If VT is
/// a vector type, the element semantics are returned.
static const fltSemantics &EVTToAPFloatSemantics(EVT VT) {
switch (VT.getScalarType().getSimpleVT().SimpleTy) {
default: llvm_unreachable("Unknown FP format");
case MVT::f16: return APFloat::IEEEhalf;
case MVT::f32: return APFloat::IEEEsingle;
case MVT::f64: return APFloat::IEEEdouble;
case MVT::f80: return APFloat::x87DoubleExtended;
case MVT::f128: return APFloat::IEEEquad;
case MVT::ppcf128: return APFloat::PPCDoubleDouble;
}
}
/// AssignOrdering - Assign an order to the SDNode.
void AssignOrdering(const SDNode *SD, unsigned Order);

14
include/llvm/IR/Type.h
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@@ -15,8 +15,10 @@
#ifndef LLVM_IR_TYPE_H
#define LLVM_IR_TYPE_H
#include "llvm/ADT/APFloat.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/ErrorHandling.h"
namespace llvm {
@@ -162,6 +164,18 @@ public:
getTypeID() == PPC_FP128TyID;
}
const fltSemantics &getFltSemantics() const {
switch (getTypeID()) {
case HalfTyID: return APFloat::IEEEhalf;
case FloatTyID: return APFloat::IEEEsingle;
case DoubleTyID: return APFloat::IEEEdouble;
case X86_FP80TyID: return APFloat::x87DoubleExtended;
case FP128TyID: return APFloat::IEEEquad;
case PPC_FP128TyID: return APFloat::PPCDoubleDouble;
default: llvm_unreachable("Invalid floating type");
}
}
/// isX86_MMXTy - Return true if this is X86 MMX.
bool isX86_MMXTy() const { return getTypeID() == X86_MMXTyID; }