diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86FastISel.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86FastISel.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86FastISel.cpp b/llvm/lib/Target/X86/X86FastISel.cpp index 697bd8aace7..6614ac0dd4a 100644 --- a/llvm/lib/Target/X86/X86FastISel.cpp +++ b/llvm/lib/Target/X86/X86FastISel.cpp @@ -1121,11 +1121,14 @@ bool X86FastISel::X86SelectRet(const Instruction *I) { RetRegs.push_back(VA.getLocReg()); } + // Swift calling convention does not require we copy the sret argument + // into %rax/%eax for the return, and SRetReturnReg is not set for Swift. + // All x86 ABIs require that for returning structs by value we copy // the sret argument into %rax/%eax (depending on ABI) for the return. // We saved the argument into a virtual register in the entry block, // so now we copy the value out and into %rax/%eax. - if (F.hasStructRetAttr()) { + if (F.hasStructRetAttr() && CC != CallingConv::Swift) { unsigned Reg = X86MFInfo->getSRetReturnReg(); assert(Reg && "SRetReturnReg should have been set in LowerFormalArguments()!"); |
