diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-11-29 22:27:25 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-11-29 22:27:25 +0000 |
| commit | 0edd83bfff5b29a6d08718a0abc13aa7197c372d (patch) | |
| tree | 69e32cd52f47874f228f455fe57e378da5a1822a /lib/Target/X86/X86InstrInfo.cpp | |
| parent | be4c84464892ea0a4bf51773502f2b0a086fe184 (diff) | |
Make X86::FsFLD0SS / FsFLD0SD real pseudo-instructions.
Like V_SET0, these instructions are expanded by ExpandPostRA to xorps /
vxorps so they can participate in execution domain swizzling.
This also makes the AVX variants redundant.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145440 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86InstrInfo.cpp')
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.cpp | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp index b28f9c1e7c..af8303d872 100644 --- a/lib/Target/X86/X86InstrInfo.cpp +++ b/lib/Target/X86/X86InstrInfo.cpp @@ -2556,6 +2556,8 @@ bool X86InstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const { bool HasAVX = TM.getSubtarget<X86Subtarget>().hasAVX(); switch (MI->getOpcode()) { case X86::V_SET0: + case X86::FsFLD0SS: + case X86::FsFLD0SD: return Expand2AddrUndef(MI, get(HasAVX ? X86::VXORPSrr : X86::XORPSrr)); case X86::TEST8ri_NOREX: MI->setDesc(get(X86::TEST8ri)); @@ -2911,11 +2913,9 @@ MachineInstr* X86InstrInfo::foldMemoryOperandImpl(MachineFunction &MF, Alignment = 16; break; case X86::FsFLD0SD: - case X86::VFsFLD0SD: Alignment = 8; break; case X86::FsFLD0SS: - case X86::VFsFLD0SS: Alignment = 4; break; default: @@ -2950,9 +2950,7 @@ MachineInstr* X86InstrInfo::foldMemoryOperandImpl(MachineFunction &MF, case X86::AVX_SETALLONES: case X86::AVX2_SETALLONES: case X86::FsFLD0SD: - case X86::FsFLD0SS: - case X86::VFsFLD0SD: - case X86::VFsFLD0SS: { + case X86::FsFLD0SS: { // Folding a V_SET0 or V_SETALLONES as a load, to ease register pressure. // Create a constant-pool entry and operands to load from it. @@ -2978,9 +2976,9 @@ MachineInstr* X86InstrInfo::foldMemoryOperandImpl(MachineFunction &MF, MachineConstantPool &MCP = *MF.getConstantPool(); Type *Ty; unsigned Opc = LoadMI->getOpcode(); - if (Opc == X86::FsFLD0SS || Opc == X86::VFsFLD0SS) + if (Opc == X86::FsFLD0SS) Ty = Type::getFloatTy(MF.getFunction()->getContext()); - else if (Opc == X86::FsFLD0SD || Opc == X86::VFsFLD0SD) + else if (Opc == X86::FsFLD0SD) Ty = Type::getDoubleTy(MF.getFunction()->getContext()); else if (Opc == X86::AVX_SET0PSY || Opc == X86::AVX_SET0PDY) Ty = VectorType::get(Type::getFloatTy(MF.getFunction()->getContext()), 8); |