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| author | Reid Kleckner <rnk@google.com> | 2016-09-30 00:17:49 +0000 |
|---|---|---|
| committer | Reid Kleckner <rnk@google.com> | 2016-09-30 00:17:49 +0000 |
| commit | 147f91c88e57652052dc9d1907e558b9e03b6e12 (patch) | |
| tree | 80a953b8d7b4bb53591e43fa12dfdf0ae0cec05e /llvm/lib | |
| parent | be6073345e68981bcb6ea73c464b5065934cdb0a (diff) | |
| download | bcm5719-llvm-147f91c88e57652052dc9d1907e558b9e03b6e12.tar.gz bcm5719-llvm-147f91c88e57652052dc9d1907e558b9e03b6e12.zip | |
[X86] Don't preserve Win64 SSE CSRs when SSE is disabled
Code that doesn't use floating point and doesn't use SSE (kernel code)
shouldn't save and restore SSE registers.
Fixes PR30503
llvm-svn: 282819
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86CallingConv.td | 4 | ||||
| -rw-r--r-- | llvm/lib/Target/X86/X86RegisterInfo.cpp | 7 |
2 files changed, 9 insertions, 2 deletions
diff --git a/llvm/lib/Target/X86/X86CallingConv.td b/llvm/lib/Target/X86/X86CallingConv.td index d38145e5519..3da335af747 100644 --- a/llvm/lib/Target/X86/X86CallingConv.td +++ b/llvm/lib/Target/X86/X86CallingConv.td @@ -863,7 +863,9 @@ def CSR_64_SwiftError : CalleeSavedRegs<(sub CSR_64, R12)>; def CSR_32EHRet : CalleeSavedRegs<(add EAX, EDX, CSR_32)>; def CSR_64EHRet : CalleeSavedRegs<(add RAX, RDX, CSR_64)>; -def CSR_Win64 : CalleeSavedRegs<(add RBX, RBP, RDI, RSI, R12, R13, R14, R15, +def CSR_Win64_NoSSE : CalleeSavedRegs<(add RBX, RBP, RDI, RSI, R12, R13, R14, R15)>; + +def CSR_Win64 : CalleeSavedRegs<(add CSR_Win64_NoSSE, (sequence "XMM%u", 6, 15))>; // The function used by Darwin to obtain the address of a thread-local variable diff --git a/llvm/lib/Target/X86/X86RegisterInfo.cpp b/llvm/lib/Target/X86/X86RegisterInfo.cpp index 3e9537bd7f5..5a33b5defde 100644 --- a/llvm/lib/Target/X86/X86RegisterInfo.cpp +++ b/llvm/lib/Target/X86/X86RegisterInfo.cpp @@ -311,6 +311,8 @@ X86RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const { return CSR_64_MostRegs_SaveList; break; case CallingConv::X86_64_Win64: + if (!HasSSE) + return CSR_Win64_NoSSE_SaveList; return CSR_Win64_SaveList; case CallingConv::X86_64_SysV: if (CallsEHReturn) @@ -337,8 +339,11 @@ X86RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const { } if (Is64Bit) { - if (IsWin64) + if (IsWin64) { + if (!HasSSE) + return CSR_Win64_NoSSE_SaveList; return CSR_Win64_SaveList; + } if (CallsEHReturn) return CSR_64EHRet_SaveList; if (Subtarget.getTargetLowering()->supportSwiftError() && |
