https://llvm.org/bugs/show_bug.cgi?id=27161
Bug ID: 27161
Summary: Lowering long vector returns fails.
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: Sparc
Assignee: unassignedb...@nondot.org
Reporter: chris.dewhu...@lero.ie
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
To recreae: Compile the following with
llc -march=sparc <filename>.ll
define <8 x i8> @fun8_2(<8 x i8> %a, <8 x i8> %b) {
entry:
%and = and <8 x i8> %b, %a
ret <8 x i8> %and
}
Expected result: Compiles well, returning some results on the stack as there
are too many results (8 in the vector) to return in output registers.
Actual result: Fails. Tries to return all results in output registers and runs
out of registers.
Important part of stack trace:
8 libLLVMCodeGen.so 0x00007f4ce1f5f47d
llvm::CCState::AnalyzeReturn(llvm::SmallVectorImpl<llvm::ISD::OutputArg>
const&, bool (*)(unsigned int, llvm::MVT, llvm::MVT,
llvm::CCValAssign::LocInfo, llvm::ISD::ArgFlagsTy, llvm::CCState&)) + 683
9 libLLVMSparcCodeGen.so 0x00007f4ce40bcda4
llvm::SparcTargetLowering::LowerReturn_32(llvm::SDValue, unsigned int, bool,
llvm::SmallVectorImpl<llvm::ISD::OutputArg> const&,
llvm::SmallVectorImpl<llvm::SDValue> const&, llvm::SDLoc, llvm::SelectionDAG&)
const + 222
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