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Enable first-class aggregates support.

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Remove the GetResultInst instruction. It is still accepted in LLVM assembly
and bitcode, where it is now auto-upgraded to ExtractValueInst. Also, remove
support for return instructions with multiple values. These are auto-upgraded
to use InsertValueInst instructions.

The IRBuilder still accepts multiple-value returns, and auto-upgrades them
to InsertValueInst instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53941 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-07-23 00:34:11 +00:00
parent 5e6ebaf4d1
commit fc74abfba5
29 changed files with 167 additions and 558 deletions
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15
lib/Transforms/Scalar/JumpThreading.cpp
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@ -440,20 +440,7 @@ void JumpThreading::ThreadEdge(BasicBlock *BB, BasicBlock *PredBB,
// We found a use of I outside of BB. Create a new stack slot to
// break this inter-block usage pattern.
if (!isa<StructType>(I->getType())) {
DemoteRegToStack(*I);
continue;
}
// Alternatively, I must be a call or invoke that returns multiple retvals.
// We can't use 'DemoteRegToStack' because that will create loads and
// stores of aggregates which is not valid yet. If I is a call, we can just
// pull all the getresult instructions up to this block. If I is an invoke,
// we are out of luck.
BasicBlock::iterator IP = I; ++IP;
for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
UI != E; ++UI)
cast<GetResultInst>(UI)->moveBefore(IP);
DemoteRegToStack(*I);
}
// We are going to have to map operands from the original BB block to the new