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| author | Hal Finkel <hfinkel@anl.gov> | 2013-03-27 00:02:20 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-03-27 00:02:20 +0000 |
| commit | b7e11e400dabced046e7ec53a66926716563bb36 (patch) | |
| tree | ac0269c393018ee12ba343e3e1f3fa47d8368cb3 /lib/Target/PowerPC/PPCInstrInfo.cpp | |
| parent | ca442a4a1aabf6199e5aee09ec604e79916d9b92 (diff) | |
| download | llvm-b7e11e400dabced046e7ec53a66926716563bb36.tar.gz llvm-b7e11e400dabced046e7ec53a66926716563bb36.tar.bz2 llvm-b7e11e400dabced046e7ec53a66926716563bb36.tar.xz | |
Don't spill PPC VRSAVE on non-Darwin (even in SjLj)
As Bill Schmidt pointed out to me, only on Darwin do we need to spill/restore
VRSAVE in the SjLj code. For non-Darwin, don't spill/restore VRSAVE (and I've
added some asserts to make sure that we're not).
As it turns out, we're not currently handling the Darwin case correctly (I've
added a FIXME in the test case). I've tried adding various implied register
definitions/uses to force the spill without success, so I'll need to address
this later.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178096 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCInstrInfo.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPCInstrInfo.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp index 2be8df9f98..1558856700 100644 --- a/lib/Target/PowerPC/PPCInstrInfo.cpp +++ b/lib/Target/PowerPC/PPCInstrInfo.cpp @@ -509,6 +509,8 @@ PPCInstrInfo::StoreRegToStackSlot(MachineFunction &MF, FrameIdx)); NonRI = true; } else if (PPC::VRSAVERCRegClass.hasSubClassEq(RC)) { + assert(TM.getSubtargetImpl()->isDarwin() && + "VRSAVE only needs spill/restore on Darwin"); NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::SPILL_VRSAVE)) .addReg(SrcReg, getKillRegState(isKill)), @@ -627,6 +629,8 @@ PPCInstrInfo::LoadRegFromStackSlot(MachineFunction &MF, DebugLoc DL, FrameIdx)); NonRI = true; } else if (PPC::VRSAVERCRegClass.hasSubClassEq(RC)) { + assert(TM.getSubtargetImpl()->isDarwin() && + "VRSAVE only needs spill/restore on Darwin"); NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::RESTORE_VRSAVE), DestReg), |