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Handle getresult instructions in different basic blocks
from their aggregate operands by moving the getresult instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48657 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1127,6 +1127,15 @@ bool CodeGenPrepare::OptimizeBlock(BasicBlock &BB) {
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// Sink address computing for memory operands into the block.
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MadeChange |= OptimizeInlineAsmInst(I, &(*CI), SunkAddrs);
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}
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} else if (GetResultInst *GRI = dyn_cast<GetResultInst>(I)) {
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// Ensure that all getresult instructions live in the same basic block
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// as their associated struct-value instructions. Codegen requires
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// this, as lowering only works on one basic block at a time.
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if (Instruction *Agg = dyn_cast<Instruction>(GRI->getAggregateValue())) {
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BasicBlock *AggBB = Agg->getParent();
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if (AggBB != GRI->getParent())
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GRI->moveBefore(AggBB->getTerminator());
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}
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}
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}
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15
test/CodeGen/X86/multiple-return-values-cross-block.ll
Normal file
15
test/CodeGen/X86/multiple-return-values-cross-block.ll
Normal file
@ -0,0 +1,15 @@
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; RUN: llvm-as < %s | llc -march=x86
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declare {x86_fp80, x86_fp80} @test()
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define void @call2(x86_fp80 *%P1, x86_fp80 *%P2) {
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%a = call {x86_fp80,x86_fp80} @test()
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%b = getresult {x86_fp80,x86_fp80} %a, 1
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store x86_fp80 %b, x86_fp80* %P1
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br label %L
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L:
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%c = getresult {x86_fp80,x86_fp80} %a, 0
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store x86_fp80 %c, x86_fp80* %P2
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ret void
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}
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