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Implement cast bool to X

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5012 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-12-13 11:31:59 +00:00
parent 71794c0069
commit 7d25589ee1
2 changed files with 8 additions and 6 deletions
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7
lib/Target/X86/InstSelectSimple.cpp
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@ -854,7 +854,7 @@ ISel::visitCastInst (CastInst &CI)
// 4) cast {int, uint, ptr} to {short, ushort} // 4) cast {int, uint, ptr} to {short, ushort}
// cast {int, uint, ptr} to {sbyte, ubyte} // cast {int, uint, ptr} to {sbyte, ubyte}
// cast {short, ushort} to {sbyte, ubyte} // cast {short, ushort} to {sbyte, ubyte}
//
// 1) Implement casts to bool by using compare on the operand followed // 1) Implement casts to bool by using compare on the operand followed
// by set if not zero on the result. // by set if not zero on the result.
if (targetType == Type::BoolTy) if (targetType == Type::BoolTy)
@ -863,10 +863,11 @@ ISel::visitCastInst (CastInst &CI)
BuildMI (BB, X86::SETNEr, 1, destReg); BuildMI (BB, X86::SETNEr, 1, destReg);
return; return;
} }
// 2) Implement casts between values of the same type class (as determined // 2) Implement casts between values of the same type class (as determined
// by getClass) by using a register-to-register move. // by getClass) by using a register-to-register move.
unsigned int srcClass = getClass (sourceType); unsigned srcClass = sourceType == Type::BoolTy ? cByte : getClass(sourceType);
unsigned int targClass = getClass (targetType); unsigned targClass = getClass (targetType);
static const unsigned regRegMove[] = { static const unsigned regRegMove[] = {
X86::MOVrr8, X86::MOVrr16, X86::MOVrr32 X86::MOVrr8, X86::MOVrr16, X86::MOVrr32
}; };

7
lib/Target/X86/X86ISelSimple.cpp
View File

@ -854,7 +854,7 @@ ISel::visitCastInst (CastInst &CI)
// 4) cast {int, uint, ptr} to {short, ushort} // 4) cast {int, uint, ptr} to {short, ushort}
// cast {int, uint, ptr} to {sbyte, ubyte} // cast {int, uint, ptr} to {sbyte, ubyte}
// cast {short, ushort} to {sbyte, ubyte} // cast {short, ushort} to {sbyte, ubyte}
//
// 1) Implement casts to bool by using compare on the operand followed // 1) Implement casts to bool by using compare on the operand followed
// by set if not zero on the result. // by set if not zero on the result.
if (targetType == Type::BoolTy) if (targetType == Type::BoolTy)
@ -863,10 +863,11 @@ ISel::visitCastInst (CastInst &CI)
BuildMI (BB, X86::SETNEr, 1, destReg); BuildMI (BB, X86::SETNEr, 1, destReg);
return; return;
} }
// 2) Implement casts between values of the same type class (as determined // 2) Implement casts between values of the same type class (as determined
// by getClass) by using a register-to-register move. // by getClass) by using a register-to-register move.
unsigned int srcClass = getClass (sourceType); unsigned srcClass = sourceType == Type::BoolTy ? cByte : getClass(sourceType);
unsigned int targClass = getClass (targetType); unsigned targClass = getClass (targetType);
static const unsigned regRegMove[] = { static const unsigned regRegMove[] = {
X86::MOVrr8, X86::MOVrr16, X86::MOVrr32 X86::MOVrr8, X86::MOVrr16, X86::MOVrr32
}; };