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| author | Akira Hatanaka <ahatanaka@mips.com> | 2012-07-23 23:45:54 +0000 |
|---|---|---|
| committer | Akira Hatanaka <ahatanaka@mips.com> | 2012-07-23 23:45:54 +0000 |
| commit | 3ee306cbc0a295409c464ffaad5ef694de8eb09a (patch) | |
| tree | 0f0cb3e4eac9c89a2931eeb2bfc7e6c8a5615e1a /lib/Target/Mips/MipsFrameLowering.cpp | |
| parent | 581a739226381450ea2271cc794618043b6aeb4a (diff) | |
| download | external_llvm-3ee306cbc0a295409c464ffaad5ef694de8eb09a.zip external_llvm-3ee306cbc0a295409c464ffaad5ef694de8eb09a.tar.gz external_llvm-3ee306cbc0a295409c464ffaad5ef694de8eb09a.tar.bz2 | |
Add basic ability to setup call frame, and make procedure calls.
Hello world will compile and execute with this patch.
Patch by Reed Kotler.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160651 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/Mips/MipsFrameLowering.cpp')
| -rw-r--r-- | lib/Target/Mips/MipsFrameLowering.cpp | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/lib/Target/Mips/MipsFrameLowering.cpp b/lib/Target/Mips/MipsFrameLowering.cpp index cb55995..6338f3c 100644 --- a/lib/Target/Mips/MipsFrameLowering.cpp +++ b/lib/Target/Mips/MipsFrameLowering.cpp @@ -114,7 +114,7 @@ void MipsFrameLowering::emitPrologue(MachineFunction &MF) const { unsigned StackAlign = getStackAlignment(); uint64_t StackSize = RoundUpToAlignment(MFI->getStackSize(), StackAlign); - if (MipsFI->globalBaseRegSet()) + if (MipsFI->globalBaseRegSet()) StackSize += MFI->getObjectOffset(MipsFI->getGlobalRegFI()) + StackAlign; else StackSize += RoundUpToAlignment(MipsFI->getMaxCallFrameSize(), StackAlign); @@ -130,8 +130,13 @@ void MipsFrameLowering::emitPrologue(MachineFunction &MF) const { MachineLocation DstML, SrcML; // Adjust stack. - if (isInt<16>(-StackSize)) // addi sp, sp, (-stacksize) - BuildMI(MBB, MBBI, dl, TII.get(ADDiu), SP).addReg(SP).addImm(-StackSize); + if (isInt<16>(-StackSize)) {// addi sp, sp, (-stacksize) + if (STI.inMips16Mode()) + BuildMI(MBB, MBBI, dl, + TII.get(Mips::SaveRaF16)).addImm(StackSize); // cleanup + else + BuildMI(MBB, MBBI, dl, TII.get(ADDiu), SP).addReg(SP).addImm(-StackSize); + } else { // Expand immediate that doesn't fit in 16-bit. unsigned ATReg = STI.isABI_N64() ? Mips::AT_64 : Mips::AT; @@ -237,8 +242,14 @@ void MipsFrameLowering::emitEpilogue(MachineFunction &MF, return; // Adjust stack. - if (isInt<16>(StackSize)) // addi sp, sp, (-stacksize) - BuildMI(MBB, MBBI, dl, TII.get(ADDiu), SP).addReg(SP).addImm(StackSize); + if (isInt<16>(StackSize)) { // addi sp, sp, (-stacksize) + if (STI.inMips16Mode()) + // assumes stacksize multiple of 8 + BuildMI(MBB, MBBI, dl, + TII.get(Mips::RestoreRaF16)).addImm(StackSize); + else + BuildMI(MBB, MBBI, dl, TII.get(ADDiu), SP).addReg(SP).addImm(StackSize); + } else { // Expand immediate that doesn't fit in 16-bit. unsigned ATReg = STI.isABI_N64() ? Mips::AT_64 : Mips::AT; |