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TargetData assumes (and some regression tests depend on it) that the size of 

an unspecified datatype in the datalayout is capped by the size of a pointer.

llvm-svn: 33411
This commit is contained in:
Owen Anderson 2007-01-20 23:07:13 +00:00
parent 6e38094235
commit e52a235e99
2 changed files with 13 additions and 5 deletions
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3
llvm/include/llvm/Target/TargetData.h
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@ -70,7 +70,8 @@ public:
/// Constructs a TargetData from a string of the following format:
/// "E-p:64:64-d:64-f:32-l:64-i:32-s:16-b:8-B:8"
/// The above string is considered the default, and any values not specified
/// in the string will be assumed to be as above.
/// in the string will be assumed to be as above, with the caveat that unspecified
/// values are always assumed to be smaller than the size of a pointer.
TargetData(const std::string &TargetDescription) {
init(TargetDescription);
}

15
llvm/lib/Target/TargetData.cpp
View File

@ -103,9 +103,9 @@ void TargetData::init(const std::string &TargetDescription) {
LittleEndian = false;
PointerMemSize = 8;
PointerABIAlignment = 8;
DoubleABIAlignment = 8;
DoubleABIAlignment = 0;
FloatABIAlignment = 4;
LongABIAlignment = 8;
LongABIAlignment = 0;
IntABIAlignment = 4;
ShortABIAlignment = 2;
ByteABIAlignment = 1;
@ -114,9 +114,9 @@ void TargetData::init(const std::string &TargetDescription) {
BytePrefAlignment = ByteABIAlignment;
ShortPrefAlignment = ShortABIAlignment;
IntPrefAlignment = IntABIAlignment;
LongPrefAlignment = LongABIAlignment;
LongPrefAlignment = 8;
FloatPrefAlignment = FloatABIAlignment;
DoublePrefAlignment = DoubleABIAlignment;
DoublePrefAlignment = 8;
PointerPrefAlignment = PointerABIAlignment;
AggMinPrefAlignment = 0;
@ -188,6 +188,13 @@ void TargetData::init(const std::string &TargetDescription) {
break;
}
}
// Unless explicitly specified, the alignments for longs and doubles is capped by
// pointer size.
if (LongABIAlignment == 0)
LongABIAlignment = LongPrefAlignment = PointerMemSize;
if (DoubleABIAlignment == 0)
DoubleABIAlignment = DoublePrefAlignment = PointerMemSize;
}
TargetData::TargetData(const Module *M) {