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[llvm-objdump][AMDGPU] Detect CPU string
AMDGPU ISA isn't backwards compatible and hence -mcpu must always be specified during disassembly. However, the AMDGPU target CPU is stored in e_flags in the ELF object. This patch allows targets to implement CPU string detection, and also implements it for AMDGPU by looking at e_flags. Reviewed By: scott.linder Differential Revision: https://reviews.llvm.org/D84519
This commit is contained in:
Ronak Chauhan
parent
17b7f05023
commit
0f95014e38
@ -86,6 +86,10 @@ public:
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SubtargetFeatures getRISCVFeatures() const;
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Optional<StringRef> tryGetCPUName() const override;
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StringRef getAMDGPUCPUName() const;
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void setARMSubArch(Triple &TheTriple) const override;
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virtual uint16_t getEType() const = 0;
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@ -327,6 +327,7 @@ public:
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virtual StringRef getFileFormatName() const = 0;
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virtual Triple::ArchType getArch() const = 0;
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virtual SubtargetFeatures getFeatures() const = 0;
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virtual Optional<StringRef> tryGetCPUName() const { return None; };
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virtual void setARMSubArch(Triple &TheTriple) const { }
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virtual Expected<uint64_t> getStartAddress() const {
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return errorCodeToError(object_error::parse_failed);
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@ -355,6 +355,117 @@ SubtargetFeatures ELFObjectFileBase::getFeatures() const {
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}
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}
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Optional<StringRef> ELFObjectFileBase::tryGetCPUName() const {
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switch (getEMachine()) {
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case ELF::EM_AMDGPU:
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return getAMDGPUCPUName();
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default:
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return None;
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}
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}
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StringRef ELFObjectFileBase::getAMDGPUCPUName() const {
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assert(getEMachine() == ELF::EM_AMDGPU);
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unsigned CPU = getPlatformFlags() & ELF::EF_AMDGPU_MACH;
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switch (CPU) {
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// Radeon HD 2000/3000 Series (R600).
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case ELF::EF_AMDGPU_MACH_R600_R600:
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return "r600";
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case ELF::EF_AMDGPU_MACH_R600_R630:
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return "r630";
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case ELF::EF_AMDGPU_MACH_R600_RS880:
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return "rs880";
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case ELF::EF_AMDGPU_MACH_R600_RV670:
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return "rv670";
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// Radeon HD 4000 Series (R700).
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case ELF::EF_AMDGPU_MACH_R600_RV710:
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return "rv710";
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case ELF::EF_AMDGPU_MACH_R600_RV730:
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return "rv730";
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case ELF::EF_AMDGPU_MACH_R600_RV770:
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return "rv770";
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// Radeon HD 5000 Series (Evergreen).
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case ELF::EF_AMDGPU_MACH_R600_CEDAR:
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return "cedar";
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case ELF::EF_AMDGPU_MACH_R600_CYPRESS:
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return "cypress";
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case ELF::EF_AMDGPU_MACH_R600_JUNIPER:
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return "juniper";
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case ELF::EF_AMDGPU_MACH_R600_REDWOOD:
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return "redwood";
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case ELF::EF_AMDGPU_MACH_R600_SUMO:
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return "sumo";
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// Radeon HD 6000 Series (Northern Islands).
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case ELF::EF_AMDGPU_MACH_R600_BARTS:
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return "barts";
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case ELF::EF_AMDGPU_MACH_R600_CAICOS:
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return "caicos";
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case ELF::EF_AMDGPU_MACH_R600_CAYMAN:
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return "cayman";
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case ELF::EF_AMDGPU_MACH_R600_TURKS:
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return "turks";
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// AMDGCN GFX6.
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX600:
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return "gfx600";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX601:
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return "gfx601";
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// AMDGCN GFX7.
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX700:
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return "gfx700";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX701:
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return "gfx701";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX702:
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return "gfx702";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX703:
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return "gfx703";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX704:
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return "gfx704";
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// AMDGCN GFX8.
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX801:
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return "gfx801";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX802:
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return "gfx802";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX803:
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return "gfx803";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX810:
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return "gfx810";
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// AMDGCN GFX9.
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX900:
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return "gfx900";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX902:
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return "gfx902";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX904:
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return "gfx904";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX906:
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return "gfx906";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX908:
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return "gfx908";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX909:
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return "gfx909";
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// AMDGCN GFX10.
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1010:
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return "gfx1010";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1011:
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return "gfx1011";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1012:
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return "gfx1012";
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case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1030:
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return "gfx1030";
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default:
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llvm_unreachable("Unknown EF_AMDGPU_MACH value");
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}
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}
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// FIXME Encode from a tablegen description or target parser.
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void ELFObjectFileBase::setARMSubArch(Triple &TheTriple) const {
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if (TheTriple.getSubArch() != Triple::NoSubArch)
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83
test/tools/llvm-objdump/ELF/AMDGPU/subtarget.ll
Normal file
83
test/tools/llvm-objdump/ELF/AMDGPU/subtarget.ll
Normal file
@ -0,0 +1,83 @@
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define amdgpu_kernel void @test_kernel() {
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ret void
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}
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; Test subtarget detection. Disassembly is only supported for GFX8 and beyond.
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;
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; ----------------------------------GFX10--------------------------------------
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;
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1030 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx1030 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1012 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx1012 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1011 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx1011 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx1010 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx1010 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; ----------------------------------GFX9---------------------------------------
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;
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx909 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx909 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx908 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx906 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx906 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx904 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx904 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx902 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx902 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx900 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; ----------------------------------GFX8---------------------------------------
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;
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx810 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx810 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx803 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx803 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx802 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx802 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx801 -filetype=obj -O0 -o %t.o %s
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; RUN: llvm-objdump -D --arch-name=amdgcn --mcpu=gfx801 %t.o > %t-specify.txt
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; RUN: llvm-objdump -D %t.o > %t-detect.txt
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; RUN: diff %t-specify.txt %t-detect.txt
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@ -2170,6 +2170,10 @@ static void disassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
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if (!AsmInfo)
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reportError(Obj->getFileName(),
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"no assembly info for target " + TripleName);
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if (MCPU.empty())
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MCPU = Obj->tryGetCPUName().getValueOr("").str();
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std::unique_ptr<const MCSubtargetInfo> STI(
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TheTarget->createMCSubtargetInfo(TripleName, MCPU, Features.getString()));
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if (!STI)
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