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Error out on CodeGen of unaligned load/store. Fix test so it isn't accidentally testing that case.

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llvm-svn: 139641
This commit is contained in:
Eli Friedman 2011-09-13 20:50:54 +00:00
parent d0121fe635
commit f13b5ef0e1
2 changed files with 11 additions and 4 deletions
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11
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -3402,6 +3402,9 @@ void SelectionDAGBuilder::visitAtomicLoad(const LoadInst &I) {
EVT VT = EVT::getEVT(I.getType());
if (I.getAlignment() * 8 != VT.getSizeInBits())
report_fatal_error("Cannot generate unaligned atomic load");
SDValue L =
DAG.getAtomic(ISD::ATOMIC_LOAD, dl, VT, VT, InChain,
getValue(I.getPointerOperand()),
@ -3427,13 +3430,17 @@ void SelectionDAGBuilder::visitAtomicStore(const StoreInst &I) {
SDValue InChain = getRoot();
EVT VT = EVT::getEVT(I.getValueOperand()->getType());
if (I.getAlignment() * 8 != VT.getSizeInBits())
report_fatal_error("Cannot generate unaligned atomic store");
if (TLI.getInsertFencesForAtomic())
InChain = InsertFenceForAtomic(InChain, Order, Scope, true, dl,
DAG, TLI);
SDValue OutChain =
DAG.getAtomic(ISD::ATOMIC_STORE, dl,
getValue(I.getValueOperand()).getValueType().getSimpleVT(),
DAG.getAtomic(ISD::ATOMIC_STORE, dl, VT,
InChain,
getValue(I.getPointerOperand()),
getValue(I.getValueOperand()),

4
test/CodeGen/X86/atomic-load-store-wide.ll
View File

@ -7,13 +7,13 @@ define void @test1(i64* %ptr, i64 %val1) {
; CHECK: test1
; CHECK: cmpxchg8b
; CHECK-NEXT: jne
store atomic i64 %val1, i64* %ptr seq_cst, align 4
store atomic i64 %val1, i64* %ptr seq_cst, align 8
ret void
}
define i64 @test2(i64* %ptr) {
; CHECK: test2
; CHECK: cmpxchg8b
%val = load atomic i64* %ptr seq_cst, align 4
%val = load atomic i64* %ptr seq_cst, align 8
ret i64 %val
}