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d9df501704
register destinations that are tied to source operands. The TargetInstrDescr::findTiedToSrcOperand method silently fails for inline assembly. The existing MachineInstr::isRegReDefinedByTwoAddr was very close to doing what is needed, so this revision makes a few changes to that method and also renames it to isRegTiedToUseOperand (for consistency with the very similar isRegTiedToDefOperand and because it handles both two-address instructions and inline assembly with tied registers). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68714 91177308-0d34-0410-b5e6-96231b3b80d8
15 lines
314 B
LLVM
15 lines
314 B
LLVM
; RUN: llvm-as < %s | llc -march=arm
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; PR3954
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define void @foo(...) nounwind {
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entry:
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%rr = alloca i32 ; <i32*> [#uses=2]
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%0 = load i32* %rr ; <i32> [#uses=1]
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%1 = call i32 asm "nop", "=r,0"(i32 %0) nounwind ; <i32> [#uses=1]
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store i32 %1, i32* %rr
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br label %return
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return: ; preds = %entry
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ret void
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}
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