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[PowerPC] Fix problems with large code model (PR17169).

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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
This commit is contained in:
Bill Schmidt 2013-09-17 20:03:25 +00:00
parent 65457b679a
commit 5bd1dfa2b5
5 changed files with 34 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
lib/Target/PowerPC/PPCAsmPrinter.cpp
View File

@ -413,7 +413,8 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
else if (MO.isJTI())
MOSymbol = GetJTISymbol(MO.getIndex());
if (IsExternal || IsFunction || IsCommon || IsAvailExt || MO.isJTI())
if (IsExternal || IsFunction || IsCommon || IsAvailExt || MO.isJTI() ||
TM.getCodeModel() == CodeModel::Large)
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
const MCExpr *Exp =
@ -438,8 +439,11 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
if (MO.isJTI())
MOSymbol = lookUpOrCreateTOCEntry(GetJTISymbol(MO.getIndex()));
else if (MO.isCPI())
else if (MO.isCPI()) {
MOSymbol = GetCPISymbol(MO.getIndex());
if (TM.getCodeModel() == CodeModel::Large)
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
}
else if (MO.isGlobal()) {
const GlobalValue *GValue = MO.getGlobal();
const GlobalAlias *GAlias = dyn_cast<GlobalAlias>(GValue);
@ -449,7 +453,8 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
const GlobalVariable *GVar = dyn_cast<GlobalVariable>(RealGValue);
if (!GVar || !GVar->hasInitializer() || RealGValue->hasCommonLinkage() ||
RealGValue->hasAvailableExternallyLinkage())
RealGValue->hasAvailableExternallyLinkage() ||
TM.getCodeModel() == CodeModel::Large)
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
}
@ -486,7 +491,7 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
} else if (MO.isCPI())
MOSymbol = GetCPISymbol(MO.getIndex());
if (IsFunction || IsExternal)
if (IsFunction || IsExternal || TM.getCodeModel() == CodeModel::Large)
MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
const MCExpr *Exp =

17
lib/Target/PowerPC/PPCFastISel.cpp
View File

@ -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;

8
test/CodeGen/PowerPC/mcm-2.ll
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@ -31,7 +31,9 @@ entry:
; LARGE: ld [[REG2:[0-9]+]], [[VAR]]@toc@l([[REG1]])
; LARGE: lwz {{[0-9]+}}, 0([[REG2]])
; LARGE: stw {{[0-9]+}}, 0([[REG2]])
; LARGE: .type [[VAR]],@object
; LARGE: .local [[VAR]]
; LARGE: .comm [[VAR]],4,4
; LARGE: [[VAR]]:
; LARGE: .tc [[VAR2:[a-z0-9A-Z_.]+]][TC],[[VAR2]]
; LARGE: .type [[VAR2]],@object
; LARGE: .local [[VAR2]]
; LARGE: .comm [[VAR2]],4,4

8
test/CodeGen/PowerPC/mcm-3.ll
View File

@ -33,9 +33,11 @@ entry:
; LARGE: ld [[REG2:[0-9]+]], [[VAR]]@toc@l([[REG1]])
; LARGE: lwz {{[0-9]+}}, 0([[REG2]])
; LARGE: stw {{[0-9]+}}, 0([[REG2]])
; LARGE: .type [[VAR]],@object
; LARGE: .data
; LARGE: .globl [[VAR]]
; LARGE: [[VAR]]:
; LARGE: .tc [[VAR2:[a-z0-9A-Z_.]+]][TC],[[VAR2]]
; LARGE: .type [[VAR2]],@object
; LARGE: .data
; LARGE: .globl [[VAR2]]
; LARGE: [[VAR2]]:
; LARGE: .long 5

4
test/CodeGen/PowerPC/mcm-4.ll
View File

@ -22,6 +22,6 @@ entry:
; LARGE: [[VAR:[a-z0-9A-Z_.]+]]:
; LARGE: .quad 4562098671269285104
; LARGE-LABEL: test_double_const:
; LARGE: addis [[REG1:[0-9]+]], 2, [[VAR]]@toc@ha
; LARGE: ld [[REG2:[0-9]+]], [[VAR]]@toc@l([[REG1]])
; LARGE: addis [[REG1:[0-9]+]], 2, [[VAR2:[a-z0-9A-Z_.]+]]@toc@ha
; LARGE: ld [[REG2:[0-9]+]], [[VAR2]]@toc@l([[REG1]])
; LARGE: lfd {{[0-9]+}}, 0([[REG2]])