6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2026-04-21 08:17:40 +00:00
Code Issues Projects Releases Wiki Activity

Add support for having different alignment for objects on call frames.

Browse Source 
The x86-64 ABI states that objects passed on the stack have
8 byte alignment. Implement that.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41768 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2007-09-07 14:52:14 +00:00
parent 8806c7b1f5
commit 588af2fb99
5 changed files with 57 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/Target/TargetData.cpp
+20 -5
View File
@@ -182,7 +182,8 @@ void TargetData::init(const std::string &TargetDescription) {
setAlignment(VECTOR_ALIGN, 8, 8, 64); // v2i32
setAlignment(VECTOR_ALIGN, 16, 16, 128); // v16i8, v8i16, v4i32, ...
setAlignment(AGGREGATE_ALIGN, 0, 8, 0); // struct, union, class, ...
setAlignment(STACK_ALIGN, 0, 8, 0); // objects on the stack
while (!temp.empty()) {
std::string token = getToken(temp, "-");
std::string arg0 = getToken(token, ":");
@@ -204,10 +205,16 @@ void TargetData::init(const std::string &TargetDescription) {
case 'i':
case 'v':
case 'f':
case 'a': {
AlignTypeEnum align_type =
(*p == 'i' ? INTEGER_ALIGN : (*p == 'f' ? FLOAT_ALIGN :
(*p == 'v' ? VECTOR_ALIGN : AGGREGATE_ALIGN)));
case 'a':
case 's': {
AlignTypeEnum align_type;
switch(*p) {
case 'i': align_type = INTEGER_ALIGN; break;
case 'v': align_type = VECTOR_ALIGN; break;
case 'f': align_type = FLOAT_ALIGN; break;
case 'a': align_type = AGGREGATE_ALIGN; break;
case 's': align_type = STACK_ALIGN; break;
}
uint32_t size = (uint32_t) atoi(++p);
unsigned char abi_align = atoi(getToken(token, ":").c_str()) / 8;
unsigned char pref_align = atoi(getToken(token, ":").c_str()) / 8;
@@ -529,6 +536,14 @@ unsigned char TargetData::getABITypeAlignment(const Type *Ty) const {
return getAlignment(Ty, true);
}
unsigned char TargetData::getCallFrameTypeAlignment(const Type *Ty) const {
for (unsigned i = 0, e = Alignments.size(); i != e; ++i)
if (Alignments[i].AlignType == STACK_ALIGN)
return Alignments[i].ABIAlign;
return getABITypeAlignment(Ty);
}
unsigned char TargetData::getPrefTypeAlignment(const Type *Ty) const {
return getAlignment(Ty, false);
}