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author | Bill Schmidt <wschmidt@linux.vnet.ibm.com> | 2013-09-17 20:03:25 +0000 |
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committer | Bill Schmidt <wschmidt@linux.vnet.ibm.com> | 2013-09-17 20:03:25 +0000 |
commit | 5bd1dfa2b5deab10a1a7a5a4ba117c28d878595d (patch) | |
tree | c313e49febb06d1386268c994f38b7284c782e57 /lib/Target/PowerPC/PPCFastISel.cpp | |
parent | 65457b679ae240c1a37da82c5484dac478c47b6d (diff) | |
download | llvm-5bd1dfa2b5deab10a1a7a5a4ba117c28d878595d.tar.gz llvm-5bd1dfa2b5deab10a1a7a5a4ba117c28d878595d.tar.bz2 llvm-5bd1dfa2b5deab10a1a7a5a4ba117c28d878595d.tar.xz |
[PowerPC] Fix problems with large code model (PR17169).
Large code model on PPC64 requires creating and referencing TOC entries when
using the addis/ld form of addressing. This was not being done in all cases.
The changes in this patch to PPCAsmPrinter::EmitInstruction() fix this. Two
test cases are also modified to reflect this requirement.
Fast-isel was not creating correct code for loading floating-point constants
using large code model. This also requires the addis/ld form of addressing.
Previously we were using the addis/lfd shortcut which is only applicable to
medium code model. One test case is modified to reflect this requirement.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190882 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCFastISel.cpp')
-rw-r--r-- | lib/Target/PowerPC/PPCFastISel.cpp | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/lib/Target/PowerPC/PPCFastISel.cpp b/lib/Target/PowerPC/PPCFastISel.cpp index 09cc21b1b6..4f8e6c1a10 100644 --- a/lib/Target/PowerPC/PPCFastISel.cpp +++ b/lib/Target/PowerPC/PPCFastISel.cpp @@ -1821,10 +1821,19 @@ unsigned PPCFastISel::PPCMaterializeFP(const ConstantFP *CFP, MVT VT) { // Otherwise we generate LF[SD](Idx[lo], ADDIStocHA(X2, Idx)). BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(PPC::ADDIStocHA), TmpReg).addReg(PPC::X2).addConstantPoolIndex(Idx); - BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(Opc), DestReg) - .addConstantPoolIndex(Idx, 0, PPCII::MO_TOC_LO) - .addReg(TmpReg) - .addMemOperand(MMO); + // But for large code model, we must generate a LDtocL followed + // by the LF[SD]. + if (CModel == CodeModel::Large) { + unsigned TmpReg2 = createResultReg(&PPC::G8RC_and_G8RC_NOX0RegClass); + BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(PPC::LDtocL), + TmpReg2).addConstantPoolIndex(Idx).addReg(TmpReg); + BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(Opc), DestReg) + .addImm(0).addReg(TmpReg2); + } else + BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(Opc), DestReg) + .addConstantPoolIndex(Idx, 0, PPCII::MO_TOC_LO) + .addReg(TmpReg) + .addMemOperand(MMO); } return DestReg; |