[clang] ee3e642 - [AMDGPU] Add gfx90c target

Tim Renouf via cfe-commits cfe-commits at lists.llvm.org
Tue Nov 3 08:28:32 PST 2020


Author: Tim Renouf
Date: 2020-11-03T16:27:43Z
New Revision: ee3e642627575bc8fb0a7008f8a02c891e172b7b

URL: https://github.com/llvm/llvm-project/commit/ee3e642627575bc8fb0a7008f8a02c891e172b7b
DIFF: https://github.com/llvm/llvm-project/commit/ee3e642627575bc8fb0a7008f8a02c891e172b7b.diff

LOG: [AMDGPU] Add gfx90c target

This differentiates the Ryzen 4000/4300/4500/4700 series APUs that were
previously included in gfx909.

Differential Revision: https://reviews.llvm.org/D90419

Change-Id: Ia901a7157eb2f73ccd9f25dbacec38427312377d

Added: 
    

Modified: 
    clang/include/clang/Basic/Cuda.h
    clang/lib/Basic/Cuda.cpp
    clang/lib/Basic/Targets/AMDGPU.cpp
    clang/lib/Basic/Targets/NVPTX.cpp
    clang/lib/CodeGen/CGOpenMPRuntimeGPU.cpp
    clang/test/CodeGenOpenCL/amdgpu-features.cl
    clang/test/Driver/amdgpu-macros.cl
    clang/test/Driver/amdgpu-mcpu.cl
    llvm/docs/AMDGPUUsage.rst
    llvm/include/llvm/BinaryFormat/ELF.h
    llvm/include/llvm/Support/TargetParser.h
    llvm/lib/Object/ELFObjectFile.cpp
    llvm/lib/ObjectYAML/ELFYAML.cpp
    llvm/lib/Support/TargetParser.cpp
    llvm/lib/Target/AMDGPU/AMDGPU.td
    llvm/lib/Target/AMDGPU/GCNProcessors.td
    llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp
    llvm/test/CodeGen/AMDGPU/elf-header-flags-mach.ll
    llvm/test/Object/AMDGPU/elf-header-flags-mach.yaml
    llvm/test/tools/llvm-readobj/ELF/amdgpu-elf-headers.test
    llvm/tools/llvm-readobj/ELFDumper.cpp

Removed: 
    


################################################################################
diff  --git a/clang/include/clang/Basic/Cuda.h b/clang/include/clang/Basic/Cuda.h
index 501e47b0e2c2..887030e2c49f 100644
--- a/clang/include/clang/Basic/Cuda.h
+++ b/clang/include/clang/Basic/Cuda.h
@@ -75,6 +75,7 @@ enum class CudaArch {
   GFX906,
   GFX908,
   GFX909,
+  GFX90c,
   GFX1010,
   GFX1011,
   GFX1012,

diff  --git a/clang/lib/Basic/Cuda.cpp b/clang/lib/Basic/Cuda.cpp
index 42a8a097b1fd..5977084b5cc1 100644
--- a/clang/lib/Basic/Cuda.cpp
+++ b/clang/lib/Basic/Cuda.cpp
@@ -87,7 +87,7 @@ CudaArchToStringMap arch_names[] = {
     GFX(805), // tongapro
     GFX(810), // stoney
     GFX(900), // vega, instinct
-    GFX(902), GFX(904), GFX(906), GFX(908), GFX(909),
+    GFX(902), GFX(904), GFX(906), GFX(908), GFX(909), GFX(90c),
     GFX(1010), GFX(1011), GFX(1012), GFX(1030), GFX(1031)
     // clang-format on
 };

diff  --git a/clang/lib/Basic/Targets/AMDGPU.cpp b/clang/lib/Basic/Targets/AMDGPU.cpp
index 0b3aebdfa15c..5ee887d464c6 100644
--- a/clang/lib/Basic/Targets/AMDGPU.cpp
+++ b/clang/lib/Basic/Targets/AMDGPU.cpp
@@ -222,6 +222,7 @@ bool AMDGPUTargetInfo::initFeatureMap(
       Features["dot1-insts"] = true;
       Features["dot2-insts"] = true;
       LLVM_FALLTHROUGH;
+    case GK_GFX90C:
     case GK_GFX909:
     case GK_GFX904:
     case GK_GFX902:

diff  --git a/clang/lib/Basic/Targets/NVPTX.cpp b/clang/lib/Basic/Targets/NVPTX.cpp
index 26c5b26beeef..7a8ae0d7ce72 100644
--- a/clang/lib/Basic/Targets/NVPTX.cpp
+++ b/clang/lib/Basic/Targets/NVPTX.cpp
@@ -200,6 +200,7 @@ void NVPTXTargetInfo::getTargetDefines(const LangOptions &Opts,
       case CudaArch::GFX906:
       case CudaArch::GFX908:
       case CudaArch::GFX909:
+      case CudaArch::GFX90c:
       case CudaArch::GFX1010:
       case CudaArch::GFX1011:
       case CudaArch::GFX1012:

diff  --git a/clang/lib/CodeGen/CGOpenMPRuntimeGPU.cpp b/clang/lib/CodeGen/CGOpenMPRuntimeGPU.cpp
index 08903a1444c2..6fe99ed89dab 100644
--- a/clang/lib/CodeGen/CGOpenMPRuntimeGPU.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntimeGPU.cpp
@@ -4640,6 +4640,7 @@ void CGOpenMPRuntimeGPU::processRequiresDirective(
       case CudaArch::GFX906:
       case CudaArch::GFX908:
       case CudaArch::GFX909:
+      case CudaArch::GFX90c:
       case CudaArch::GFX1010:
       case CudaArch::GFX1011:
       case CudaArch::GFX1012:
@@ -4706,6 +4707,7 @@ static std::pair<unsigned, unsigned> getSMsBlocksPerSM(CodeGenModule &CGM) {
   case CudaArch::GFX906:
   case CudaArch::GFX908:
   case CudaArch::GFX909:
+  case CudaArch::GFX90c:
   case CudaArch::GFX1010:
   case CudaArch::GFX1011:
   case CudaArch::GFX1012:

diff  --git a/clang/test/CodeGenOpenCL/amdgpu-features.cl b/clang/test/CodeGenOpenCL/amdgpu-features.cl
index 6a27c047d58c..67ddf6c70df1 100644
--- a/clang/test/CodeGenOpenCL/amdgpu-features.cl
+++ b/clang/test/CodeGenOpenCL/amdgpu-features.cl
@@ -12,6 +12,7 @@
 // RUN: %clang_cc1 -triple amdgcn -target-cpu gfx906 -S -emit-llvm -o - %s | FileCheck --check-prefix=GFX906 %s
 // RUN: %clang_cc1 -triple amdgcn -target-cpu gfx908 -S -emit-llvm -o - %s | FileCheck --check-prefix=GFX908 %s
 // RUN: %clang_cc1 -triple amdgcn -target-cpu gfx909 -S -emit-llvm -o - %s | FileCheck --check-prefix=GFX909 %s
+// RUN: %clang_cc1 -triple amdgcn -target-cpu gfx90c -S -emit-llvm -o - %s | FileCheck --check-prefix=GFX90C %s
 // RUN: %clang_cc1 -triple amdgcn -target-cpu gfx1010 -S -emit-llvm -o - %s | FileCheck --check-prefix=GFX1010 %s
 // RUN: %clang_cc1 -triple amdgcn -target-cpu gfx1011 -S -emit-llvm -o - %s | FileCheck --check-prefix=GFX1011 %s
 // RUN: %clang_cc1 -triple amdgcn -target-cpu gfx1012 -S -emit-llvm -o - %s | FileCheck --check-prefix=GFX1012 %s
@@ -39,6 +40,7 @@
 // GFX906: "target-features"="+16-bit-insts,+ci-insts,+dl-insts,+dot1-insts,+dot2-insts,+dpp,+flat-address-space,+gfx8-insts,+gfx9-insts,+s-memrealtime"
 // GFX908: "target-features"="+16-bit-insts,+ci-insts,+dl-insts,+dot1-insts,+dot2-insts,+dot3-insts,+dot4-insts,+dot5-insts,+dot6-insts,+dpp,+flat-address-space,+gfx8-insts,+gfx9-insts,+mai-insts,+s-memrealtime"
 // GFX909: "target-features"="+16-bit-insts,+ci-insts,+dpp,+flat-address-space,+gfx8-insts,+gfx9-insts,+s-memrealtime"
+// GFX90C: "target-features"="+16-bit-insts,+ci-insts,+dpp,+flat-address-space,+gfx8-insts,+gfx9-insts,+s-memrealtime"
 // GFX1010: "target-features"="+16-bit-insts,+ci-insts,+dl-insts,+dpp,+flat-address-space,+gfx10-insts,+gfx8-insts,+gfx9-insts,+s-memrealtime"
 // GFX1011: "target-features"="+16-bit-insts,+ci-insts,+dl-insts,+dot1-insts,+dot2-insts,+dot5-insts,+dot6-insts,+dpp,+flat-address-space,+gfx10-insts,+gfx8-insts,+gfx9-insts,+s-memrealtime"
 // GFX1012: "target-features"="+16-bit-insts,+ci-insts,+dl-insts,+dot1-insts,+dot2-insts,+dot5-insts,+dot6-insts,+dpp,+flat-address-space,+gfx10-insts,+gfx8-insts,+gfx9-insts,+s-memrealtime"

diff  --git a/clang/test/Driver/amdgpu-macros.cl b/clang/test/Driver/amdgpu-macros.cl
index 9d028fe9d05a..38ed743150bb 100644
--- a/clang/test/Driver/amdgpu-macros.cl
+++ b/clang/test/Driver/amdgpu-macros.cl
@@ -181,6 +181,7 @@
 // RUN: %clang -E -dM -target amdgcn -mcpu=gfx906 %s 2>&1 | FileCheck --check-prefixes=ARCH-GCN,GFX906 %s
 // RUN: %clang -E -dM -target amdgcn -mcpu=gfx908 %s 2>&1 | FileCheck --check-prefixes=ARCH-GCN,GFX908 %s
 // RUN: %clang -E -dM -target amdgcn -mcpu=gfx909 %s 2>&1 | FileCheck --check-prefixes=ARCH-GCN,GFX909 %s
+// RUN: %clang -E -dM -target amdgcn -mcpu=gfx90c %s 2>&1 | FileCheck --check-prefixes=ARCH-GCN,GFX90C %s
 // RUN: %clang -E -dM -target amdgcn -mcpu=gfx1010 %s 2>&1 | FileCheck --check-prefixes=ARCH-GCN,GFX1010 %s
 // RUN: %clang -E -dM -target amdgcn -mcpu=gfx1011 %s 2>&1 | FileCheck --check-prefixes=ARCH-GCN,GFX1011 %s
 // RUN: %clang -E -dM -target amdgcn -mcpu=gfx1012 %s 2>&1 | FileCheck --check-prefixes=ARCH-GCN,GFX1012 %s
@@ -208,6 +209,7 @@
 // GFX906-DAG: #define FP_FAST_FMA 1
 // GFX908-DAG: #define FP_FAST_FMA 1
 // GFX909-DAG: #define FP_FAST_FMA 1
+// GFX90C-DAG: #define FP_FAST_FMA 1
 // GFX1010-DAG: #define FP_FAST_FMA 1
 // GFX1011-DAG: #define FP_FAST_FMA 1
 // GFX1012-DAG: #define FP_FAST_FMA 1
@@ -235,6 +237,7 @@
 // GFX906-DAG: #define FP_FAST_FMAF 1
 // GFX908-DAG: #define FP_FAST_FMAF 1
 // GFX909-DAG: #define FP_FAST_FMAF 1
+// GFX90C-DAG: #define FP_FAST_FMAF 1
 // GFX1010-DAG: #define FP_FAST_FMAF 1
 // GFX1011-DAG: #define FP_FAST_FMAF 1
 // GFX1012-DAG: #define FP_FAST_FMAF 1
@@ -266,6 +269,7 @@
 // GFX906-DAG: #define __HAS_FMAF__ 1
 // GFX908-DAG: #define __HAS_FMAF__ 1
 // GFX909-DAG: #define __HAS_FMAF__ 1
+// GFX90C-DAG: #define __HAS_FMAF__ 1
 // GFX1010-DAG: #define __HAS_FMAF__ 1
 // GFX1011-DAG: #define __HAS_FMAF__ 1
 // GFX1012-DAG: #define __HAS_FMAF__ 1
@@ -293,6 +297,7 @@
 // GFX906-DAG: #define __HAS_FP64__ 1
 // GFX908-DAG: #define __HAS_FP64__ 1
 // GFX909-DAG: #define __HAS_FP64__ 1
+// GFX90C-DAG: #define __HAS_FP64__ 1
 // GFX1010-DAG: #define __HAS_FP64__ 1
 // GFX1011-DAG: #define __HAS_FP64__ 1
 // GFX1012-DAG: #define __HAS_FP64__ 1
@@ -320,6 +325,7 @@
 // GFX906-DAG: #define __HAS_LDEXPF__ 1
 // GFX908-DAG: #define __HAS_LDEXPF__ 1
 // GFX909-DAG: #define __HAS_LDEXPF__ 1
+// GFX90C-DAG: #define __HAS_LDEXPF__ 1
 // GFX1010-DAG: #define __HAS_LDEXPF__ 1
 // GFX1011-DAG: #define __HAS_LDEXPF__ 1
 // GFX1012-DAG: #define __HAS_LDEXPF__ 1
@@ -347,6 +353,7 @@
 // GFX906-DAG: #define __gfx906__ 1
 // GFX908-DAG: #define __gfx908__ 1
 // GFX909-DAG: #define __gfx909__ 1
+// GFX90C-DAG: #define __gfx90c__ 1
 // GFX1010-DAG: #define __gfx1010__ 1
 // GFX1011-DAG: #define __gfx1011__ 1
 // GFX1012-DAG: #define __gfx1012__ 1
@@ -374,6 +381,7 @@
 // GFX906-DAG: #define __amdgcn_processor__ "gfx906"
 // GFX908-DAG: #define __amdgcn_processor__ "gfx908"
 // GFX909-DAG: #define __amdgcn_processor__ "gfx909"
+// GFX90C-DAG: #define __amdgcn_processor__ "gfx90c"
 // GFX1010-DAG: #define __amdgcn_processor__ "gfx1010"
 // GFX1011-DAG: #define __amdgcn_processor__ "gfx1011"
 // GFX1012-DAG: #define __amdgcn_processor__ "gfx1012"
@@ -401,6 +409,7 @@
 // GFX906-DAG: #define __AMDGCN_WAVEFRONT_SIZE 64
 // GFX908-DAG: #define __AMDGCN_WAVEFRONT_SIZE 64
 // GFX909-DAG: #define __AMDGCN_WAVEFRONT_SIZE 64
+// GFX90C-DAG: #define __AMDGCN_WAVEFRONT_SIZE 64
 // GFX1010-DAG: #define __AMDGCN_WAVEFRONT_SIZE 32
 // GFX1011-DAG: #define __AMDGCN_WAVEFRONT_SIZE 32
 // GFX1012-DAG: #define __AMDGCN_WAVEFRONT_SIZE 32

diff  --git a/clang/test/Driver/amdgpu-mcpu.cl b/clang/test/Driver/amdgpu-mcpu.cl
index c5bd8ed05135..d3ffe8f51719 100644
--- a/clang/test/Driver/amdgpu-mcpu.cl
+++ b/clang/test/Driver/amdgpu-mcpu.cl
@@ -90,6 +90,7 @@
 // RUN: %clang -### -target amdgcn -mcpu=gfx906 %s 2>&1 | FileCheck --check-prefix=GFX906 %s
 // RUN: %clang -### -target amdgcn -mcpu=gfx908 %s 2>&1 | FileCheck --check-prefix=GFX908 %s
 // RUN: %clang -### -target amdgcn -mcpu=gfx909 %s 2>&1 | FileCheck --check-prefix=GFX909 %s
+// RUN: %clang -### -target amdgcn -mcpu=gfx90c %s 2>&1 | FileCheck --check-prefix=GFX90C %s
 // RUN: %clang -### -target amdgcn -mcpu=gfx1010 %s 2>&1 | FileCheck --check-prefix=GFX1010 %s
 // RUN: %clang -### -target amdgcn -mcpu=gfx1011 %s 2>&1 | FileCheck --check-prefix=GFX1011 %s
 // RUN: %clang -### -target amdgcn -mcpu=gfx1012 %s 2>&1 | FileCheck --check-prefix=GFX1012 %s
@@ -118,6 +119,7 @@
 // GFX906:    "-target-cpu" "gfx906"
 // GFX908:    "-target-cpu" "gfx908"
 // GFX909:    "-target-cpu" "gfx909"
+// GFX90C:    "-target-cpu" "gfx90c"
 // GFX1010:   "-target-cpu" "gfx1010"
 // GFX1011:   "-target-cpu" "gfx1011"
 // GFX1012:   "-target-cpu" "gfx1012"

diff  --git a/llvm/docs/AMDGPUUsage.rst b/llvm/docs/AMDGPUUsage.rst
index 0732d1a79ab3..58791b8fa8fc 100644
--- a/llvm/docs/AMDGPUUsage.rst
+++ b/llvm/docs/AMDGPUUsage.rst
@@ -257,6 +257,22 @@ names from both the *Processor* and *Alternative Processor* can be used.
                                                                                              Add product
                                                                                              names.
 
+     ``gfx90c``                  ``amdgcn``   APU   - xnack                               - Ryzen 7 4700G
+                                                      [on]                                - Ryzen 7 4700GE
+                                                                                          - Ryzen 7 4700G
+                                                                                          - Ryzen 7 4700GE
+                                                                                          - Ryzen 5 4600G
+                                                                                          - Ryzen 5 4600GE
+                                                                                          - Ryzen 3 4300G
+                                                                                          - Ryzen 3 4300GE
+                                                                                          - Ryzen Pro 4000G
+                                                                                          - Ryzen 7 Pro 4700G
+                                                                                          - Ryzen 7 Pro 4750GE
+                                                                                          - Ryzen 5 Pro 4650G
+                                                                                          - Ryzen 5 Pro 4650GE
+                                                                                          - Ryzen 3 Pro 4350G
+                                                                                          - Ryzen 3 Pro 4350GE
+
      **GCN GFX10** [AMD-GCN-GFX10]_
      -----------------------------------------------------------------------------------------------------------
      ``gfx1010``                 ``amdgcn``   dGPU  - xnack                               - Radeon RX 5700
@@ -848,7 +864,7 @@ The AMDGPU backend uses the following ELF header:
      ``EF_AMDGPU_MACH_AMDGCN_GFX906``     0x02f      ``gfx906``
      ``EF_AMDGPU_MACH_AMDGCN_GFX908``     0x030      ``gfx908``
      ``EF_AMDGPU_MACH_AMDGCN_GFX909``     0x031      ``gfx909``
-     *reserved*                           0x032      Reserved.
+     ``EF_AMDGPU_MACH_AMDGCN_GFX90C``     0x032      ``gfx90c``
      ``EF_AMDGPU_MACH_AMDGCN_GFX1010``    0x033      ``gfx1010``
      ``EF_AMDGPU_MACH_AMDGCN_GFX1011``    0x034      ``gfx1011``
      ``EF_AMDGPU_MACH_AMDGCN_GFX1012``    0x035      ``gfx1012``

diff  --git a/llvm/include/llvm/BinaryFormat/ELF.h b/llvm/include/llvm/BinaryFormat/ELF.h
index af6cdabcad4f..8045aa0b2f41 100644
--- a/llvm/include/llvm/BinaryFormat/ELF.h
+++ b/llvm/include/llvm/BinaryFormat/ELF.h
@@ -713,7 +713,7 @@ enum : unsigned {
   EF_AMDGPU_MACH_AMDGCN_GFX906        = 0x02f,
   EF_AMDGPU_MACH_AMDGCN_GFX908        = 0x030,
   EF_AMDGPU_MACH_AMDGCN_GFX909        = 0x031,
-  EF_AMDGPU_MACH_AMDGCN_RESERVED_0X32 = 0x032,
+  EF_AMDGPU_MACH_AMDGCN_GFX90C        = 0x032,
   EF_AMDGPU_MACH_AMDGCN_GFX1010       = 0x033,
   EF_AMDGPU_MACH_AMDGCN_GFX1011       = 0x034,
   EF_AMDGPU_MACH_AMDGCN_GFX1012       = 0x035,

diff  --git a/llvm/include/llvm/Support/TargetParser.h b/llvm/include/llvm/Support/TargetParser.h
index ac3a59ed2f69..d5e0a4bbf1cb 100644
--- a/llvm/include/llvm/Support/TargetParser.h
+++ b/llvm/include/llvm/Support/TargetParser.h
@@ -83,6 +83,7 @@ enum GPUKind : uint32_t {
   GK_GFX906 = 63,
   GK_GFX908 = 64,
   GK_GFX909 = 65,
+  GK_GFX90C = 66,
 
   GK_GFX1010 = 71,
   GK_GFX1011 = 72,

diff  --git a/llvm/lib/Object/ELFObjectFile.cpp b/llvm/lib/Object/ELFObjectFile.cpp
index fda89d85ba25..bf94993524b9 100644
--- a/llvm/lib/Object/ELFObjectFile.cpp
+++ b/llvm/lib/Object/ELFObjectFile.cpp
@@ -456,6 +456,8 @@ StringRef ELFObjectFileBase::getAMDGPUCPUName() const {
     return "gfx908";
   case ELF::EF_AMDGPU_MACH_AMDGCN_GFX909:
     return "gfx909";
+  case ELF::EF_AMDGPU_MACH_AMDGCN_GFX90C:
+    return "gfx90c";
 
   // AMDGCN GFX10.
   case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1010:

diff  --git a/llvm/lib/ObjectYAML/ELFYAML.cpp b/llvm/lib/ObjectYAML/ELFYAML.cpp
index f9ee4ce02a13..f798c22e17eb 100644
--- a/llvm/lib/ObjectYAML/ELFYAML.cpp
+++ b/llvm/lib/ObjectYAML/ELFYAML.cpp
@@ -439,6 +439,7 @@ void ScalarBitSetTraits<ELFYAML::ELF_EF>::bitset(IO &IO,
     BCaseMask(EF_AMDGPU_MACH_AMDGCN_GFX906, EF_AMDGPU_MACH);
     BCaseMask(EF_AMDGPU_MACH_AMDGCN_GFX908, EF_AMDGPU_MACH);
     BCaseMask(EF_AMDGPU_MACH_AMDGCN_GFX909, EF_AMDGPU_MACH);
+    BCaseMask(EF_AMDGPU_MACH_AMDGCN_GFX90C, EF_AMDGPU_MACH);
     BCaseMask(EF_AMDGPU_MACH_AMDGCN_GFX1010, EF_AMDGPU_MACH);
     BCaseMask(EF_AMDGPU_MACH_AMDGCN_GFX1011, EF_AMDGPU_MACH);
     BCaseMask(EF_AMDGPU_MACH_AMDGCN_GFX1012, EF_AMDGPU_MACH);

diff  --git a/llvm/lib/Support/TargetParser.cpp b/llvm/lib/Support/TargetParser.cpp
index cb25fcfdd019..4fa64bd7545e 100644
--- a/llvm/lib/Support/TargetParser.cpp
+++ b/llvm/lib/Support/TargetParser.cpp
@@ -104,6 +104,7 @@ constexpr GPUInfo AMDGCNGPUs[] = {
   {{"gfx906"},    {"gfx906"},  GK_GFX906,  FEATURE_FAST_FMA_F32|FEATURE_FAST_DENORMAL_F32|FEATURE_XNACK|FEATURE_SRAM_ECC},
   {{"gfx908"},    {"gfx908"},  GK_GFX908,  FEATURE_FAST_FMA_F32|FEATURE_FAST_DENORMAL_F32|FEATURE_XNACK|FEATURE_SRAM_ECC},
   {{"gfx909"},    {"gfx909"},  GK_GFX909,  FEATURE_FAST_FMA_F32|FEATURE_FAST_DENORMAL_F32|FEATURE_XNACK},
+  {{"gfx90c"},    {"gfx90c"},  GK_GFX90C,  FEATURE_FAST_FMA_F32|FEATURE_FAST_DENORMAL_F32|FEATURE_XNACK},
   {{"gfx1010"},   {"gfx1010"}, GK_GFX1010, FEATURE_FAST_FMA_F32|FEATURE_FAST_DENORMAL_F32|FEATURE_WAVE32|FEATURE_XNACK},
   {{"gfx1011"},   {"gfx1011"}, GK_GFX1011, FEATURE_FAST_FMA_F32|FEATURE_FAST_DENORMAL_F32|FEATURE_WAVE32|FEATURE_XNACK},
   {{"gfx1012"},   {"gfx1012"}, GK_GFX1012, FEATURE_FAST_FMA_F32|FEATURE_FAST_DENORMAL_F32|FEATURE_WAVE32|FEATURE_XNACK},
@@ -211,6 +212,7 @@ AMDGPU::IsaVersion AMDGPU::getIsaVersion(StringRef GPU) {
   case GK_GFX906:  return {9, 0, 6};
   case GK_GFX908:  return {9, 0, 8};
   case GK_GFX909:  return {9, 0, 9};
+  case GK_GFX90C:  return {9, 0, 12};
   case GK_GFX1010: return {10, 1, 0};
   case GK_GFX1011: return {10, 1, 1};
   case GK_GFX1012: return {10, 1, 2};

diff  --git a/llvm/lib/Target/AMDGPU/AMDGPU.td b/llvm/lib/Target/AMDGPU/AMDGPU.td
index 85d790234e6d..1df61f8bafcf 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPU.td
+++ b/llvm/lib/Target/AMDGPU/AMDGPU.td
@@ -886,6 +886,13 @@ def FeatureISAVersion9_0_9 : FeatureSet<
    FeatureXNACK,
    FeatureImageGather4D16Bug]>;
 
+def FeatureISAVersion9_0_C : FeatureSet<
+  [FeatureGFX9,
+   FeatureMadMixInsts,
+   FeatureLDSBankCount32,
+   FeatureXNACK,
+   FeatureImageGather4D16Bug]>;
+
 // TODO: Organize more features into groups.
 def FeatureGroup {
   // Bugs present on gfx10.1.

diff  --git a/llvm/lib/Target/AMDGPU/GCNProcessors.td b/llvm/lib/Target/AMDGPU/GCNProcessors.td
index 1ba76dfdb1c9..24cf5e349a3a 100644
--- a/llvm/lib/Target/AMDGPU/GCNProcessors.td
+++ b/llvm/lib/Target/AMDGPU/GCNProcessors.td
@@ -184,6 +184,10 @@ def : ProcessorModel<"gfx909", SIQuarterSpeedModel,
   FeatureISAVersion9_0_9.Features
 >;
 
+def : ProcessorModel<"gfx90c", SIQuarterSpeedModel,
+  FeatureISAVersion9_0_C.Features
+>;
+
 //===----------------------------------------------------------------------===//
 // GCN GFX10.
 //===----------------------------------------------------------------------===//

diff  --git a/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp b/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp
index 36c97fa90e87..83842940e8c8 100644
--- a/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp
+++ b/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp
@@ -97,6 +97,7 @@ StringRef AMDGPUTargetStreamer::getArchNameFromElfMach(unsigned ElfMach) {
   case ELF::EF_AMDGPU_MACH_AMDGCN_GFX906:  AK = GK_GFX906;  break;
   case ELF::EF_AMDGPU_MACH_AMDGCN_GFX908:  AK = GK_GFX908;  break;
   case ELF::EF_AMDGPU_MACH_AMDGCN_GFX909:  AK = GK_GFX909;  break;
+  case ELF::EF_AMDGPU_MACH_AMDGCN_GFX90C:  AK = GK_GFX90C;  break;
   case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1010: AK = GK_GFX1010; break;
   case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1011: AK = GK_GFX1011; break;
   case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1012: AK = GK_GFX1012; break;
@@ -154,6 +155,7 @@ unsigned AMDGPUTargetStreamer::getElfMach(StringRef GPU) {
   case GK_GFX906:  return ELF::EF_AMDGPU_MACH_AMDGCN_GFX906;
   case GK_GFX908:  return ELF::EF_AMDGPU_MACH_AMDGCN_GFX908;
   case GK_GFX909:  return ELF::EF_AMDGPU_MACH_AMDGCN_GFX909;
+  case GK_GFX90C:  return ELF::EF_AMDGPU_MACH_AMDGCN_GFX90C;
   case GK_GFX1010: return ELF::EF_AMDGPU_MACH_AMDGCN_GFX1010;
   case GK_GFX1011: return ELF::EF_AMDGPU_MACH_AMDGCN_GFX1011;
   case GK_GFX1012: return ELF::EF_AMDGPU_MACH_AMDGCN_GFX1012;

diff  --git a/llvm/test/CodeGen/AMDGPU/elf-header-flags-mach.ll b/llvm/test/CodeGen/AMDGPU/elf-header-flags-mach.ll
index b72b1da5ccd3..4a05c10de872 100644
--- a/llvm/test/CodeGen/AMDGPU/elf-header-flags-mach.ll
+++ b/llvm/test/CodeGen/AMDGPU/elf-header-flags-mach.ll
@@ -52,6 +52,7 @@
 ; RUN: llc -filetype=obj -march=amdgcn -mcpu=gfx906 < %s | llvm-readobj -file-headers - | FileCheck --check-prefixes=ALL,ARCH-GCN,GFX906 %s
 ; RUN: llc -filetype=obj -march=amdgcn -mcpu=gfx908 < %s | llvm-readobj -file-headers - | FileCheck --check-prefixes=ALL,ARCH-GCN,GFX908 %s
 ; RUN: llc -filetype=obj -march=amdgcn -mcpu=gfx909 < %s | llvm-readobj -file-headers - | FileCheck --check-prefixes=ALL,ARCH-GCN,GFX909 %s
+; RUN: llc -filetype=obj -march=amdgcn -mcpu=gfx90c < %s | llvm-readobj -file-headers - | FileCheck --check-prefixes=ALL,ARCH-GCN,GFX90C %s
 ; RUN: llc -filetype=obj -march=amdgcn -mcpu=gfx1010 < %s | llvm-readobj -file-headers - | FileCheck --check-prefixes=ALL,ARCH-GCN,GFX1010 %s
 ; RUN: llc -filetype=obj -march=amdgcn -mcpu=gfx1011 < %s | llvm-readobj -file-headers - | FileCheck --check-prefixes=ALL,ARCH-GCN,GFX1011 %s
 ; RUN: llc -filetype=obj -march=amdgcn -mcpu=gfx1012 < %s | llvm-readobj -file-headers - | FileCheck --check-prefixes=ALL,ARCH-GCN,GFX1012 %s
@@ -108,6 +109,7 @@
 ; GFX908:        EF_AMDGPU_MACH_AMDGCN_GFX908 (0x30)
 ; GFX908-NEXT:   EF_AMDGPU_SRAM_ECC           (0x200)
 ; GFX909:        EF_AMDGPU_MACH_AMDGCN_GFX909 (0x31)
+; GFX90C:        EF_AMDGPU_MACH_AMDGCN_GFX90C (0x32)
 ; GFX1010:       EF_AMDGPU_MACH_AMDGCN_GFX1010 (0x33)
 ; GFX1011:       EF_AMDGPU_MACH_AMDGCN_GFX1011 (0x34)
 ; GFX1012:       EF_AMDGPU_MACH_AMDGCN_GFX1012 (0x35)

diff  --git a/llvm/test/Object/AMDGPU/elf-header-flags-mach.yaml b/llvm/test/Object/AMDGPU/elf-header-flags-mach.yaml
index d84016f651c1..42aeccc4a98a 100644
--- a/llvm/test/Object/AMDGPU/elf-header-flags-mach.yaml
+++ b/llvm/test/Object/AMDGPU/elf-header-flags-mach.yaml
@@ -142,6 +142,10 @@
 # RUN: llvm-readobj -S --file-headers %t.o.AMDGCN_GFX909 | FileCheck --check-prefixes=ELF-AMDGCN-ALL,ELF-AMDGCN-GFX909 %s
 # RUN: obj2yaml %t.o.AMDGCN_GFX909 | FileCheck --check-prefixes=YAML-AMDGCN-ALL,YAML-AMDGCN-GFX909 %s
 
+# RUN: sed -e 's/<BITS>/64/' -e 's/<MACH>/AMDGCN_GFX90C/' %s | yaml2obj -o %t.o.AMDGCN_GFX90C
+# RUN: llvm-readobj -S --file-headers %t.o.AMDGCN_GFX90C | FileCheck --check-prefixes=ELF-AMDGCN-ALL,ELF-AMDGCN-GFX90C %s
+# RUN: obj2yaml %t.o.AMDGCN_GFX90C | FileCheck --check-prefixes=YAML-AMDGCN-ALL,YAML-AMDGCN-GFX90C %s
+
 # RUN: sed -e 's/<BITS>/64/' -e 's/<MACH>/AMDGCN_GFX1010/' %s | yaml2obj -o %t.o.AMDGCN_GFX1010
 # RUN: llvm-readobj -S --file-headers %t.o.AMDGCN_GFX1010 | FileCheck --check-prefixes=ELF-AMDGCN-ALL,ELF-AMDGCN-GFX1010 %s
 # RUN: obj2yaml %t.o.AMDGCN_GFX1010 | FileCheck --check-prefixes=YAML-AMDGCN-ALL,YAML-AMDGCN-GFX1010 %s
@@ -292,6 +296,9 @@
 # ELF-AMDGCN-GFX909:    EF_AMDGPU_MACH_AMDGCN_GFX909 (0x31)
 # YAML-AMDGCN-GFX909:   Flags: [ EF_AMDGPU_MACH_AMDGCN_GFX909 ]
 
+# ELF-AMDGCN-GFX90C:    EF_AMDGPU_MACH_AMDGCN_GFX90C (0x32)
+# YAML-AMDGCN-GFX90C:   Flags: [ EF_AMDGPU_MACH_AMDGCN_GFX90C ]
+
 # ELF-AMDGCN-GFX1010:   EF_AMDGPU_MACH_AMDGCN_GFX1010 (0x33)
 # YAML-AMDGCN-GFX1010:  Flags: [ EF_AMDGPU_MACH_AMDGCN_GFX1010 ]
 

diff  --git a/llvm/test/tools/llvm-readobj/ELF/amdgpu-elf-headers.test b/llvm/test/tools/llvm-readobj/ELF/amdgpu-elf-headers.test
index f1ad7ad561d0..26ba944fc040 100644
--- a/llvm/test/tools/llvm-readobj/ELF/amdgpu-elf-headers.test
+++ b/llvm/test/tools/llvm-readobj/ELF/amdgpu-elf-headers.test
@@ -58,6 +58,9 @@
 # RUN: yaml2obj %s -o %t -DCPU=GFX909
 # RUN: llvm-readobj -h %t | FileCheck %s --match-full-lines -DFILE=%t -DCPU=GFX909 -DFLAGS=0x31
 
+# RUN: yaml2obj %s -o %t -DCPU=GFX90C
+# RUN: llvm-readobj -h %t | FileCheck %s --match-full-lines -DFILE=%t -DCPU=GFX90C -DFLAGS=0x32
+
 # RUN: yaml2obj %s -o %t -DCPU=GFX1010
 # RUN: llvm-readobj -h %t | FileCheck %s --match-full-lines -DFILE=%t -DCPU=GFX1010 -DFLAGS=0x33
 

diff  --git a/llvm/tools/llvm-readobj/ELFDumper.cpp b/llvm/tools/llvm-readobj/ELFDumper.cpp
index 470ba491a89b..15ec3cf856bc 100644
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -1779,6 +1779,7 @@ static const EnumEntry<unsigned> ElfHeaderAMDGPUFlags[] = {
   LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX906),
   LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX908),
   LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX909),
+  LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX90C),
   LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1010),
   LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1011),
   LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1012),


        


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