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Implement address space attribute for LLVM pointer types. Address spaces are

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regions of memory that have a target specific relationship, as described in the 
Embedded C Technical Report. 

This also implements the 2007-12-11-AddressSpaces test, 
which demonstrates how address space attributes can be used in LLVM IR.

In addition, this patch changes the bitcode signature for stores (in a backwards 
compatible manner), such that the pointer type, rather than the pointee type, is 
encoded. This permits type information in the pointer (e.g. address space) to be 
preserved for stores.

LangRef updates are forthcoming.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44858 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Christopher Lamb
2007-12-11 08:59:05 +00:00
parent 7431c2ba79
commit fe63fb986d
15 changed files with 151 additions and 43 deletions
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10
include/llvm/Bitcode/LLVMBitCodes.h
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@ -46,7 +46,7 @@ namespace bitc {
MODULE_CODE_SECTIONNAME = 5, // SECTIONNAME: [strchr x N]
MODULE_CODE_DEPLIB = 6, // DEPLIB: [strchr x N]
// GLOBALVAR: [type, isconst, initid,
// GLOBALVAR: [pointer type, isconst, initid,
// linkage, alignment, section, visibility, threadlocal]
MODULE_CODE_GLOBALVAR = 7,
@ -194,9 +194,13 @@ namespace bitc {
FUNC_CODE_INST_FREE = 18, // FREE: [opty, op]
FUNC_CODE_INST_ALLOCA = 19, // ALLOCA: [instty, op, align]
FUNC_CODE_INST_LOAD = 20, // LOAD: [opty, op, align, vol]
FUNC_CODE_INST_STORE = 21, // STORE: [ptrty,val,ptr, align, vol]
FUNC_CODE_INST_STORE = 21, // STORE: [valty,val,ptr, align, vol]
FUNC_CODE_INST_CALL = 22, // CALL: [attr, fnty, fnid, args...]
FUNC_CODE_INST_VAARG = 23 // VAARG: [valistty, valist, instty]
FUNC_CODE_INST_VAARG = 23, // VAARG: [valistty, valist, instty]
// This store code encodes the pointer type, rather than the value type
// this is so information only available in the pointer type (e.g. address
// spaces) is retained.
FUNC_CODE_INST_STORE2 = 24 // STORE: [ptrty,ptr,val, align, vol]
};
} // End bitc namespace
} // End llvm namespace