RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-01-31 20:51:52 +01:00
Code Issues Projects Releases Wiki Activity

Allow i16 type indices to gep.

Browse Source 
llvm-svn: 69946
This commit is contained in:
Sanjiv Gupta 2009-04-24 02:37:54 +00:00
parent 9d13b714f5
commit f1177e1be7
3 changed files with 7 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
docs/LangRef.html
View File

@ -3629,7 +3629,8 @@ the pointer before continuing calculation.</p>
<p>The type of each index argument depends on the type it is indexing into. <p>The type of each index argument depends on the type it is indexing into.
When indexing into a (packed) structure, only <tt>i32</tt> integer When indexing into a (packed) structure, only <tt>i32</tt> integer
<b>constants</b> are allowed. When indexing into an array, pointer or vector, <b>constants</b> are allowed. When indexing into an array, pointer or vector,
only integers of 32 or 64 bits are allowed (also non-constants). 32-bit values only integers of 16, 32 or 64 bits are allowed (also non-constants).16-bit
values will be sign extended to 32-bits if required, and 32-bit values
will be sign extended to 64-bits if required.</p> will be sign extended to 64-bits if required.</p>
<p>For example, let's consider a C code fragment and how it gets <p>For example, let's consider a C code fragment and how it gets
@ -3717,6 +3718,8 @@ FAQ</a>.</p>
%vptr = getelementptr {i32, &lt;2 x i8&gt;}* %svptr, i64 0, i32 1, i32 1 %vptr = getelementptr {i32, &lt;2 x i8&gt;}* %svptr, i64 0, i32 1, i32 1
<i>; yields i8*:eptr</i> <i>; yields i8*:eptr</i>
%eptr = getelementptr [12 x i8]* %aptr, i64 0, i32 1 %eptr = getelementptr [12 x i8]* %aptr, i64 0, i32 1
<i>; yields i16*:iptr</i>
%iptr = getelementptr [10 x i16]* @arr, i16 0, i16 0
</pre> </pre>
</div> </div>

7
lib/Transforms/Scalar/InstructionCombining.cpp
View File

@ -10695,12 +10695,7 @@ Instruction *InstCombiner::visitGetElementPtrInst(GetElementPtrInst &GEP) {
gep_type_iterator GTI = gep_type_begin(GEP); gep_type_iterator GTI = gep_type_begin(GEP);
for (User::op_iterator i = GEP.op_begin() + 1, e = GEP.op_end(); for (User::op_iterator i = GEP.op_begin() + 1, e = GEP.op_end();
i != e; ++i, ++GTI) { i != e; ++i, ++GTI) {
// Before trying to eliminate/introduce cast/ext/trunc to make if (isa<SequentialType>(*GTI)) {
// indices as pointer types, make sure that the pointer size
// makes a valid sequential index.
const SequentialType *ST = dyn_cast<SequentialType>(*GTI);
Value *PtrTypeVal = Constant::getNullValue(TD->getIntPtrType());
if (ST && ST->indexValid(PtrTypeVal)) {
if (CastInst *CI = dyn_cast<CastInst>(*i)) { if (CastInst *CI = dyn_cast<CastInst>(*i)) {
if (CI->getOpcode() == Instruction::ZExt || if (CI->getOpcode() == Instruction::ZExt ||
CI->getOpcode() == Instruction::SExt) { CI->getOpcode() == Instruction::SExt) {

3
lib/VMCore/Type.cpp
View File

@ -1411,7 +1411,8 @@ void PointerType::typeBecameConcrete(const DerivedType *AbsTy) {
bool SequentialType::indexValid(const Value *V) const { bool SequentialType::indexValid(const Value *V) const {
if (const IntegerType *IT = dyn_cast<IntegerType>(V->getType())) if (const IntegerType *IT = dyn_cast<IntegerType>(V->getType()))
return IT->getBitWidth() == 32 || IT->getBitWidth() == 64; return IT->getBitWidth() == 16 || IT->getBitWidth() == 32 ||
IT->getBitWidth() == 64;
return false; return false;
} }