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AMDGPU/SI: Don't use fixup_si_rodata for scratch rsrc relocations 

Summary:
We need to set the fixup type to FK_Data_4 for the
SCRATCH_RSRC_DWORD[01] symbols, since these require absolute
relocations, and fixup_si_rodata is for relative relocations.

Reviewers: arsenm, kzhuravl

Subscribers: arsenm, kzhuravl, llvm-commits

Differential Revision: http://reviews.llvm.org/D21153

llvm-svn: 272417
This commit is contained in:
Tom Stellard 2016-06-10 19:26:38 +00:00
parent cbd68ecf04
commit f3af841462
3 changed files with 11 additions and 3 deletions
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1
llvm/lib/Target/AMDGPU/AMDGPUMCInstLower.cpp
View File

@ -75,6 +75,7 @@ void AMDGPUMCInstLower::lower(const MachineInstr *MI, MCInst &OutMI) const {
}
case MachineOperand::MO_ExternalSymbol: {
MCSymbol *Sym = Ctx.getOrCreateSymbol(StringRef(MO.getSymbolName()));
Sym->setExternal(true);
const MCSymbolRefExpr *Expr = MCSymbolRefExpr::create(Sym, Ctx);
MCOp = MCOperand::createExpr(Expr);
break;

7
llvm/lib/Target/AMDGPU/MCTargetDesc/SIMCCodeEmitter.cpp
View File

@ -249,7 +249,12 @@ uint64_t SIMCCodeEmitter::getMachineOpValue(const MCInst &MI,
if (MO.isExpr()) {
const MCSymbolRefExpr *Expr = cast<MCSymbolRefExpr>(MO.getExpr());
MCFixupKind Kind = (MCFixupKind)AMDGPU::fixup_si_rodata;
const MCSymbol &Sym = Expr->getSymbol();
MCFixupKind Kind;
if (Sym.isExternal())
Kind = FK_Data_4;
else
Kind = (MCFixupKind)AMDGPU::fixup_si_rodata;
Fixups.push_back(MCFixup::create(4, Expr, Kind, MI.getLoc()));
}

6
llvm/test/CodeGen/AMDGPU/large-alloca-compute.ll
View File

@ -1,5 +1,5 @@
; RUN: llc -march=amdgcn -mcpu=bonaire < %s | FileCheck -check-prefix=GCN -check-prefix=CI -check-prefix=ALL %s
; RUN: llc -march=amdgcn -mcpu=carrizo < %s | FileCheck -check-prefix=GCN -check-prefix=VI -check-prefix=ALL %s
; RUN: llc -march=amdgcn -mcpu=bonaire -show-mc-encoding < %s | FileCheck -check-prefix=GCN -check-prefix=CI -check-prefix=ALL %s
; RUN: llc -march=amdgcn -mcpu=carrizo --show-mc-encoding < %s | FileCheck -check-prefix=GCN -check-prefix=VI -check-prefix=ALL %s
; RUN: llc -march=amdgcn -mcpu=bonaire -mtriple=amdgcn-unknown-amdhsa < %s -mattr=-flat-for-global | FileCheck -check-prefix=GCNHSA -check-prefix=CIHSA -check-prefix=ALL %s
; RUN: llc -march=amdgcn -mcpu=carrizo -mtriple=amdgcn-unknown-amdhsa -mattr=-flat-for-global < %s | FileCheck -check-prefix=GCNHSA -check-prefix=VIHSA -check-prefix=ALL %s
@ -8,7 +8,9 @@
; ALL-LABEL: {{^}}large_alloca_compute_shader:
; GCN-DAG: s_mov_b32 s{{[0-9]+}}, SCRATCH_RSRC_DWORD0
; GCN-DAG: ; fixup A - offset: 4, value: SCRATCH_RSRC_DWORD0, kind: FK_Data_4
; GCN-DAG: s_mov_b32 s{{[0-9]+}}, SCRATCH_RSRC_DWORD1
; GCN-DAG: ; fixup A - offset: 4, value: SCRATCH_RSRC_DWORD1, kind: FK_Data_4
; GCN-DAG: s_mov_b32 s{{[0-9]+}}, -1
; CI-DAG: s_mov_b32 s{{[0-9]+}}, 0x88f000
; VI-DAG: s_mov_b32 s{{[0-9]+}}, 0x880000