[clang] [Clang][Xtensa] Add Xtensa target. (PR #118008)
Alexey Gerenkov via cfe-commits
cfe-commits at lists.llvm.org
Thu Nov 28 05:56:04 PST 2024
https://github.com/gerekon created https://github.com/llvm/llvm-project/pull/118008
This PR implements support for generic Xtensa target in CLang.
>From bf0488585f41d3342c5c6d289d4621e3f50195cc Mon Sep 17 00:00:00 2001
From: Andrei Safronov <safronov at espressif.com>
Date: Thu, 1 Jun 2023 00:42:37 +0300
Subject: [PATCH] [Clang][Xtensa] Add Xtensa target.
---
clang/include/clang/Basic/TargetInfo.h | 5 +-
clang/lib/AST/ASTContext.cpp | 47 ++++
clang/lib/Basic/CMakeLists.txt | 1 +
clang/lib/Basic/Targets.cpp | 4 +
clang/lib/Basic/Targets/Xtensa.cpp | 62 +++++
clang/lib/Basic/Targets/Xtensa.h | 141 +++++++++++
clang/lib/Driver/ToolChains/CommonArgs.cpp | 5 +
clang/test/Preprocessor/init.c | 272 +++++++++++++++++++++
clang/test/Preprocessor/stdint.c | 107 ++++++++
9 files changed, 643 insertions(+), 1 deletion(-)
create mode 100644 clang/lib/Basic/Targets/Xtensa.cpp
create mode 100644 clang/lib/Basic/Targets/Xtensa.h
diff --git a/clang/include/clang/Basic/TargetInfo.h b/clang/include/clang/Basic/TargetInfo.h
index 9cd23d123f2bac..97444ef28a66d8 100644
--- a/clang/include/clang/Basic/TargetInfo.h
+++ b/clang/include/clang/Basic/TargetInfo.h
@@ -358,7 +358,10 @@ class TargetInfo : public TransferrableTargetInfo,
// void *__saved_reg_area_end_pointer;
// void *__overflow_area_pointer;
//} va_list;
- HexagonBuiltinVaList
+ HexagonBuiltinVaList,
+
+ // Tensilica Xtensa
+ XtensaABIBuiltinVaList
};
protected:
diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 80e8c5b9df58e7..0f2df53d07e086 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -9727,6 +9727,51 @@ static TypedefDecl *CreateHexagonBuiltinVaListDecl(const ASTContext *Context) {
return Context->buildImplicitTypedef(VaListTagArrayType, "__builtin_va_list");
}
+static TypedefDecl *
+CreateXtensaABIBuiltinVaListDecl(const ASTContext *Context) {
+ // typedef struct __va_list_tag {
+ RecordDecl *VaListTagDecl;
+
+ VaListTagDecl = Context->buildImplicitRecord("__va_list_tag");
+ VaListTagDecl->startDefinition();
+
+ const size_t NumFields = 3;
+ QualType FieldTypes[NumFields];
+ const char *FieldNames[NumFields];
+
+ // int* __va_stk;
+ FieldTypes[0] = Context->getPointerType(Context->IntTy);
+ FieldNames[0] = "__va_stk";
+
+ // int* __va_reg;
+ FieldTypes[1] = Context->getPointerType(Context->IntTy);
+ FieldNames[1] = "__va_reg";
+
+ // int __va_ndx;
+ FieldTypes[2] = Context->IntTy;
+ FieldNames[2] = "__va_ndx";
+
+ // Create fields
+ for (unsigned i = 0; i < NumFields; ++i) {
+ FieldDecl *Field = FieldDecl::Create(
+ *Context, VaListTagDecl, SourceLocation(), SourceLocation(),
+ &Context->Idents.get(FieldNames[i]), FieldTypes[i], /*TInfo=*/nullptr,
+ /*BitWidth=*/nullptr,
+ /*Mutable=*/false, ICIS_NoInit);
+ Field->setAccess(AS_public);
+ VaListTagDecl->addDecl(Field);
+ }
+ VaListTagDecl->completeDefinition();
+ Context->VaListTagDecl = VaListTagDecl;
+ QualType VaListTagType = Context->getRecordType(VaListTagDecl);
+
+ // } __va_list_tag;
+ TypedefDecl *VaListTagTypedefDecl =
+ Context->buildImplicitTypedef(VaListTagType, "__builtin_va_list");
+
+ return VaListTagTypedefDecl;
+}
+
static TypedefDecl *CreateVaListDecl(const ASTContext *Context,
TargetInfo::BuiltinVaListKind Kind) {
switch (Kind) {
@@ -9748,6 +9793,8 @@ static TypedefDecl *CreateVaListDecl(const ASTContext *Context,
return CreateSystemZBuiltinVaListDecl(Context);
case TargetInfo::HexagonBuiltinVaList:
return CreateHexagonBuiltinVaListDecl(Context);
+ case TargetInfo::XtensaABIBuiltinVaList:
+ return CreateXtensaABIBuiltinVaListDecl(Context);
}
llvm_unreachable("Unhandled __builtin_va_list type kind");
diff --git a/clang/lib/Basic/CMakeLists.txt b/clang/lib/Basic/CMakeLists.txt
index e11e1ac4a6fa63..331dfbb3f4b67e 100644
--- a/clang/lib/Basic/CMakeLists.txt
+++ b/clang/lib/Basic/CMakeLists.txt
@@ -120,6 +120,7 @@ add_clang_library(clangBasic
Targets/WebAssembly.cpp
Targets/X86.cpp
Targets/XCore.cpp
+ Targets/Xtensa.cpp
TokenKinds.cpp
TypeTraits.cpp
Version.cpp
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 0021d33c45d7c9..3ef99acdc2e323 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -40,6 +40,7 @@
#include "Targets/WebAssembly.h"
#include "Targets/X86.h"
#include "Targets/XCore.h"
+#include "Targets/Xtensa.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/DiagnosticFrontend.h"
#include "llvm/ADT/StringExtras.h"
@@ -737,6 +738,9 @@ std::unique_ptr<TargetInfo> AllocateTarget(const llvm::Triple &Triple,
default:
return std::make_unique<LoongArch64TargetInfo>(Triple, Opts);
}
+
+ case llvm::Triple::xtensa:
+ return std::make_unique<XtensaTargetInfo>(Triple, Opts);
}
}
} // namespace targets
diff --git a/clang/lib/Basic/Targets/Xtensa.cpp b/clang/lib/Basic/Targets/Xtensa.cpp
new file mode 100644
index 00000000000000..b46db6bfbd67ac
--- /dev/null
+++ b/clang/lib/Basic/Targets/Xtensa.cpp
@@ -0,0 +1,62 @@
+//===--- Xtensa.cpp - Implement Xtensa target feature support -------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements Xtensa TargetInfo objects.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Xtensa.h"
+#include "clang/Basic/Builtins.h"
+#include "clang/Basic/MacroBuilder.h"
+#include "clang/Basic/TargetBuiltins.h"
+
+using namespace clang;
+using namespace clang::targets;
+
+void XtensaTargetInfo::getTargetDefines(const LangOptions &Opts,
+ MacroBuilder &Builder) const {
+ Builder.defineMacro("__xtensa__");
+ Builder.defineMacro("__XTENSA__");
+ if (BigEndian)
+ Builder.defineMacro("__XTENSA_EB__");
+ else
+ Builder.defineMacro("__XTENSA_EL__");
+ if (HasWindowed)
+ Builder.defineMacro("__XTENSA_WINDOWED_ABI__");
+ else
+ Builder.defineMacro("__XTENSA_CALL0_ABI__");
+ if (!HasFP)
+ Builder.defineMacro("__XTENSA_SOFT_FLOAT__");
+ Builder.defineMacro("__XCHAL_HAVE_BE", BigEndian ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_DENSITY", HasDensity ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_MAC16", HasMAC16 ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_MUL16", HasMul16 ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_MUL32", HasMul32 ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_MUL32_HIGH", HasMul32High ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_DIV32", HasDiv32 ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_NSA", HasNSA ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_MINMAX", HasMINMAX ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_SEXT", HasSEXT ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_LOOPS", HasLoop ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_THREADPTR", HasTHREADPTR ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_S32C1I", HasS32C1I ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_BOOLEANS", HasBoolean ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_FP", HasFP ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_FP_DIV", HasFP ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_FP_RECIP", HasFP ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_FP_SQRT", HasFP ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_FP_RSQRT", HasFP ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_FP_POSTINC", HasFP ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_WINDOWED", HasWindowed ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_DEBUG", HasDebug ? "1" : "0");
+ Builder.defineMacro("__XCHAL_HAVE_ABS"); // core arch
+ Builder.defineMacro("__XCHAL_HAVE_ADDX"); // core arch
+ Builder.defineMacro("__XCHAL_HAVE_L32R"); // core arch
+}
diff --git a/clang/lib/Basic/Targets/Xtensa.h b/clang/lib/Basic/Targets/Xtensa.h
new file mode 100644
index 00000000000000..d850980bfc33e1
--- /dev/null
+++ b/clang/lib/Basic/Targets/Xtensa.h
@@ -0,0 +1,141 @@
+//===--- Xtensa.h - Declare Xtensa target feature support -------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares Xtensa TargetInfo objects.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_XTENSA_H
+#define LLVM_CLANG_LIB_BASIC_TARGETS_XTENSA_H
+
+#include "clang/Basic/TargetInfo.h"
+#include "clang/Basic/TargetOptions.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/TargetParser/Triple.h"
+
+#include "clang/Basic/Builtins.h"
+#include "clang/Basic/MacroBuilder.h"
+#include "clang/Basic/TargetBuiltins.h"
+
+namespace clang {
+namespace targets {
+
+class LLVM_LIBRARY_VISIBILITY XtensaTargetInfo : public TargetInfo {
+ static const Builtin::Info BuiltinInfo[];
+
+protected:
+ std::string CPU;
+ bool HasFP = false;
+ bool HasWindowed = false;
+ bool HasBoolean = false;
+ bool HasHIFI3 = false;
+ bool HasDensity = false;
+ bool HasLoop = false;
+ bool HasSEXT = false;
+ bool HasNSA = false;
+ bool HasCLAPMS = false;
+ bool HasMINMAX = false;
+ bool HasMul16 = false;
+ bool HasMul32 = false;
+ bool HasMul32High = false;
+ bool HasDiv32 = false;
+ bool HasMAC16 = false;
+ bool HasS32C1I = false;
+ bool HasTHREADPTR = false;
+ bool HasExtendedL32R = false;
+ bool HasATOMCTL = false;
+ bool HasMEMCTL = false;
+ bool HasDebug = false;
+ bool HasException = false;
+ bool HasHighPriInterrupts = false;
+ bool HasCoprocessor = false;
+ bool HasInterrupt = false;
+ bool HasRelocatableVector = false;
+ bool HasTimerInt = false;
+ bool HasPRID = false;
+ bool HasRegionProtection = false;
+ bool HasMiscSR = false;
+
+public:
+ XtensaTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
+ : TargetInfo(Triple) {
+ BigEndian = false;
+ NoAsmVariants = true;
+ LongLongAlign = 64;
+ SuitableAlign = 32;
+ DoubleAlign = LongDoubleAlign = 64;
+ SizeType = UnsignedInt;
+ PtrDiffType = SignedInt;
+ IntPtrType = SignedInt;
+ WCharType = SignedInt;
+ WIntType = UnsignedInt;
+ UseZeroLengthBitfieldAlignment = true;
+ MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 32;
+ resetDataLayout("e-m:e-p:32:32-i8:8:32-i16:16:32-i64:64-n32");
+ }
+
+ void getTargetDefines(const LangOptions &Opts,
+ MacroBuilder &Builder) const override;
+
+ ArrayRef<Builtin::Info> getTargetBuiltins() const override {
+ return std::nullopt;
+ }
+
+ BuiltinVaListKind getBuiltinVaListKind() const override {
+
+ return TargetInfo::XtensaABIBuiltinVaList;
+ }
+
+ std::string_view getClobbers() const override { return ""; }
+
+ ArrayRef<const char *> getGCCRegNames() const override {
+ static const char *const GCCRegNames[] = {
+ // General register name
+ "a0", "sp", "a1", "a2", "a3", "a4", "a5", "a6", "a7", "a8", "a9", "a10",
+ "a11", "a12", "a13", "a14", "a15",
+ // Special register name
+ "sar"};
+ return llvm::ArrayRef(GCCRegNames);
+ }
+
+ ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override {
+ return std::nullopt;
+ }
+
+ bool validateAsmConstraint(const char *&Name,
+ TargetInfo::ConstraintInfo &Info) const override {
+ switch (*Name) {
+ default:
+ return false;
+ case 'a':
+ Info.setAllowsRegister();
+ return true;
+ }
+ return false;
+ }
+
+ int getEHDataRegisterNumber(unsigned RegNo) const override {
+ return (RegNo < 2) ? RegNo : -1;
+ }
+
+ bool isValidCPUName(StringRef Name) const override {
+ return llvm::StringSwitch<bool>(Name).Case("generic", true).Default(false);
+ }
+
+ bool setCPU(const std::string &Name) override {
+ CPU = Name;
+ return isValidCPUName(Name);
+ }
+};
+
+} // namespace targets
+} // namespace clang
+#endif // LLVM_CLANG_LIB_BASIC_TARGETS_XTENSA_H
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index 8d977149e62485..49298c5c6cb8fb 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -671,6 +671,11 @@ std::string tools::getCPUName(const Driver &D, const ArgList &Args,
case llvm::Triple::loongarch32:
case llvm::Triple::loongarch64:
return loongarch::getLoongArchTargetCPU(Args, T);
+
+ case llvm::Triple::xtensa:
+ if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
+ return A->getValue();
+ return "";
}
}
diff --git a/clang/test/Preprocessor/init.c b/clang/test/Preprocessor/init.c
index 05225c120b13de..ead349dec3cf18 100644
--- a/clang/test/Preprocessor/init.c
+++ b/clang/test/Preprocessor/init.c
@@ -2742,3 +2742,275 @@
// RISCV64-LINUX: #define __unix__ 1
// RISCV64-LINUX: #define linux 1
// RISCV64-LINUX: #define unix 1
+
+// RUN: %clang_cc1 -E -dM -ffreestanding -fgnuc-version=4.2.1 -triple=xtensa < /dev/null \
+// RUN: | FileCheck -match-full-lines -check-prefix=XTENSA %s
+// XTENSA: #define _ILP32 1
+// XTENSA: #define __ATOMIC_ACQUIRE 2
+// XTENSA: #define __ATOMIC_ACQ_REL 4
+// XTENSA: #define __ATOMIC_CONSUME 1
+// XTENSA: #define __ATOMIC_RELAXED 0
+// XTENSA: #define __ATOMIC_RELEASE 3
+// XTENSA: #define __ATOMIC_SEQ_CST 5
+// XTENSA: #define __BIGGEST_ALIGNMENT__ 4
+// XTENSA: #define __BITINT_MAXWIDTH__ 128
+// XTENSA: #define __BOOL_WIDTH__ 1
+// XTENSA: #define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
+// XTENSA: #define __CHAR16_TYPE__ unsigned short
+// XTENSA: #define __CHAR32_TYPE__ unsigned int
+// XTENSA: #define __CHAR_BIT__ 8
+// XTENSA: #define __CLANG_ATOMIC_BOOL_LOCK_FREE 2
+// XTENSA: #define __CLANG_ATOMIC_CHAR16_T_LOCK_FREE 2
+// XTENSA: #define __CLANG_ATOMIC_CHAR32_T_LOCK_FREE 2
+// XTENSA: #define __CLANG_ATOMIC_CHAR_LOCK_FREE 2
+// XTENSA: #define __CLANG_ATOMIC_INT_LOCK_FREE 2
+// XTENSA: #define __CLANG_ATOMIC_LLONG_LOCK_FREE 1
+// XTENSA: #define __CLANG_ATOMIC_LONG_LOCK_FREE 2
+// XTENSA: #define __CLANG_ATOMIC_POINTER_LOCK_FREE 2
+// XTENSA: #define __CLANG_ATOMIC_SHORT_LOCK_FREE 2
+// XTENSA: #define __CLANG_ATOMIC_WCHAR_T_LOCK_FREE 2
+// XTENSA: #define __CONSTANT_CFSTRINGS__ 1
+// XTENSA: #define __DBL_DECIMAL_DIG__ 17
+// XTENSA: #define __DBL_DENORM_MIN__ 4.9406564584124654e-324
+// XTENSA: #define __DBL_DIG__ 15
+// XTENSA: #define __DBL_EPSILON__ 2.2204460492503131e-16
+// XTENSA: #define __DBL_HAS_DENORM__ 1
+// XTENSA: #define __DBL_HAS_INFINITY__ 1
+// XTENSA: #define __DBL_HAS_QUIET_NAN__ 1
+// XTENSA: #define __DBL_MANT_DIG__ 53
+// XTENSA: #define __DBL_MAX_10_EXP__ 308
+// XTENSA: #define __DBL_MAX_EXP__ 1024
+// XTENSA: #define __DBL_MAX__ 1.7976931348623157e+308
+// XTENSA: #define __DBL_MIN_10_EXP__ (-307)
+// XTENSA: #define __DBL_MIN_EXP__ (-1021)
+// XTENSA: #define __DBL_MIN__ 2.2250738585072014e-308
+// XTENSA: #define __DBL_NORM_MAX__ 1.7976931348623157e+308
+// XTENSA: #define __DECIMAL_DIG__ __LDBL_DECIMAL_DIG__
+// XTENSA: #define __ELF__ 1
+// XTENSA: #define __FINITE_MATH_ONLY__ 0
+// XTENSA: #define __FLT_DECIMAL_DIG__ 9
+// XTENSA: #define __FLT_DENORM_MIN__ 1.40129846e-45F
+// XTENSA: #define __FLT_DIG__ 6
+// XTENSA: #define __FLT_EPSILON__ 1.19209290e-7F
+// XTENSA: #define __FLT_HAS_DENORM__ 1
+// XTENSA: #define __FLT_HAS_INFINITY__ 1
+// XTENSA: #define __FLT_HAS_QUIET_NAN__ 1
+// XTENSA: #define __FLT_MANT_DIG__ 24
+// XTENSA: #define __FLT_MAX_10_EXP__ 38
+// XTENSA: #define __FLT_MAX_EXP__ 128
+// XTENSA: #define __FLT_MAX__ 3.40282347e+38F
+// XTENSA: #define __FLT_MIN_10_EXP__ (-37)
+// XTENSA: #define __FLT_MIN_EXP__ (-125)
+// XTENSA: #define __FLT_MIN__ 1.17549435e-38F
+// XTENSA: #define __FLT_NORM_MAX__ 3.40282347e+38F
+// XTENSA: #define __FLT_RADIX__ 2
+// XTENSA: #define __FPCLASS_NEGINF 0x0004
+// XTENSA: #define __FPCLASS_NEGNORMAL 0x0008
+// XTENSA: #define __FPCLASS_NEGSUBNORMAL 0x0010
+// XTENSA: #define __FPCLASS_NEGZERO 0x0020
+// XTENSA: #define __FPCLASS_POSINF 0x0200
+// XTENSA: #define __FPCLASS_POSNORMAL 0x0100
+// XTENSA: #define __FPCLASS_POSSUBNORMAL 0x0080
+// XTENSA: #define __FPCLASS_POSZERO 0x0040
+// XTENSA: #define __FPCLASS_QNAN 0x0002
+// XTENSA: #define __FPCLASS_SNAN 0x0001
+// XTENSA: #define __GCC_ATOMIC_BOOL_LOCK_FREE 2
+// XTENSA: #define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 2
+// XTENSA: #define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 2
+// XTENSA: #define __GCC_ATOMIC_CHAR_LOCK_FREE 2
+// XTENSA: #define __GCC_ATOMIC_INT_LOCK_FREE 2
+// XTENSA: #define __GCC_ATOMIC_LLONG_LOCK_FREE 1
+// XTENSA: #define __GCC_ATOMIC_LONG_LOCK_FREE 2
+// XTENSA: #define __GCC_ATOMIC_POINTER_LOCK_FREE 2
+// XTENSA: #define __GCC_ATOMIC_SHORT_LOCK_FREE 2
+// XTENSA: #define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1
+// XTENSA: #define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
+// XTENSA: #define __GCC_CONSTRUCTIVE_SIZE 64
+// XTENSA: #define __GCC_DESTRUCTIVE_SIZE 64
+// XTENSA: #define __GNUC_MINOR__ {{.*}}
+// XTENSA: #define __GNUC_PATCHLEVEL__ {{.*}}
+// XTENSA: #define __GNUC_STDC_INLINE__ 1
+// XTENSA: #define __GNUC__ {{.*}}
+// XTENSA: #define __GXX_ABI_VERSION {{.*}}
+// XTENSA: #define __ILP32__ 1
+// XTENSA: #define __INT16_C_SUFFIX__
+// XTENSA: #define __INT16_MAX__ 32767
+// XTENSA: #define __INT16_TYPE__ short
+// XTENSA: #define __INT32_C_SUFFIX__
+// XTENSA: #define __INT32_MAX__ 2147483647
+// XTENSA: #define __INT32_TYPE__ int
+// XTENSA: #define __INT64_C_SUFFIX__ LL
+// XTENSA: #define __INT64_MAX__ 9223372036854775807LL
+// XTENSA: #define __INT64_TYPE__ long long int
+// XTENSA: #define __INT8_C_SUFFIX__
+// XTENSA: #define __INT8_MAX__ 127
+// XTENSA: #define __INT8_TYPE__ signed char
+// XTENSA: #define __INTMAX_C_SUFFIX__ LL
+// XTENSA: #define __INTMAX_MAX__ 9223372036854775807LL
+// XTENSA: #define __INTMAX_TYPE__ long long int
+// XTENSA: #define __INTMAX_WIDTH__ 64
+// XTENSA: #define __INTPTR_MAX__ 2147483647
+// XTENSA: #define __INTPTR_TYPE__ int
+// XTENSA: #define __INTPTR_WIDTH__ 32
+// TODO: Xtensa GCC defines INT_FAST16 as int
+// XTENSA: #define __INT_FAST16_MAX__ 32767
+// XTENSA: #define __INT_FAST16_TYPE__ short
+// XTENSA: #define __INT_FAST16_WIDTH__ 16
+// XTENSA: #define __INT_FAST32_MAX__ 2147483647
+// XTENSA: #define __INT_FAST32_TYPE__ int
+// XTENSA: #define __INT_FAST32_WIDTH__ 32
+// XTENSA: #define __INT_FAST64_MAX__ 9223372036854775807LL
+// XTENSA: #define __INT_FAST64_TYPE__ long long int
+// XTENSA: #define __INT_FAST64_WIDTH__ 64
+// TODO: Xtensa GCC defines INT_FAST8 as int
+// XTENSA: #define __INT_FAST8_MAX__ 127
+// XTENSA: #define __INT_FAST8_TYPE__ signed char
+// XTENSA: #define __INT_FAST8_WIDTH__ 8
+// XTENSA: #define __INT_LEAST16_MAX__ 32767
+// XTENSA: #define __INT_LEAST16_TYPE__ short
+// XTENSA: #define __INT_LEAST16_WIDTH__ 16
+// XTENSA: #define __INT_LEAST32_MAX__ 2147483647
+// XTENSA: #define __INT_LEAST32_TYPE__ int
+// XTENSA: #define __INT_LEAST32_WIDTH__ 32
+// XTENSA: #define __INT_LEAST64_MAX__ 9223372036854775807LL
+// XTENSA: #define __INT_LEAST64_TYPE__ long long int
+// XTENSA: #define __INT_LEAST64_WIDTH__ 64
+// XTENSA: #define __INT_LEAST8_MAX__ 127
+// XTENSA: #define __INT_LEAST8_TYPE__ signed char
+// XTENSA: #define __INT_LEAST8_WIDTH__ 8
+// XTENSA: #define __INT_MAX__ 2147483647
+// XTENSA: #define __INT_WIDTH__ 32
+// XTENSA: #define __LDBL_DECIMAL_DIG__ 17
+// XTENSA: #define __LDBL_DENORM_MIN__ 4.9406564584124654e-324L
+// XTENSA: #define __LDBL_DIG__ 15
+// XTENSA: #define __LDBL_EPSILON__ 2.2204460492503131e-16L
+// XTENSA: #define __LDBL_HAS_DENORM__ 1
+// XTENSA: #define __LDBL_HAS_INFINITY__ 1
+// XTENSA: #define __LDBL_HAS_QUIET_NAN__ 1
+// XTENSA: #define __LDBL_MANT_DIG__ 53
+// XTENSA: #define __LDBL_MAX_10_EXP__ 308
+// XTENSA: #define __LDBL_MAX_EXP__ 1024
+// XTENSA: #define __LDBL_MAX__ 1.7976931348623157e+308L
+// XTENSA: #define __LDBL_MIN_10_EXP__ (-307)
+// XTENSA: #define __LDBL_MIN_EXP__ (-1021)
+// XTENSA: #define __LDBL_MIN__ 2.2250738585072014e-308L
+// XTENSA: #define __LDBL_NORM_MAX__ 1.7976931348623157e+308L
+// XTENSA: #define __LITTLE_ENDIAN__ 1
+// XTENSA: #define __LLONG_WIDTH__ 64
+// XTENSA: #define __LONG_LONG_MAX__ 9223372036854775807LL
+// XTENSA: #define __LONG_MAX__ 2147483647L
+// XTENSA: #define __LONG_WIDTH__ 32
+// XTENSA: #define __MEMORY_SCOPE_DEVICE 1
+// XTENSA: #define __MEMORY_SCOPE_SINGLE 4
+// XTENSA: #define __MEMORY_SCOPE_SYSTEM 0
+// XTENSA: #define __MEMORY_SCOPE_WRKGRP 2
+// XTENSA: #define __MEMORY_SCOPE_WVFRNT 3
+// XTENSA: #define __NO_INLINE__ 1
+// XTENSA: #define __NO_MATH_ERRNO__ 1
+// XTENSA: #define __OBJC_BOOL_IS_BOOL 0
+// XTENSA: #define __POINTER_WIDTH__ 32
+// XTENSA: #define __PRAGMA_REDEFINE_EXTNAME 1
+// XTENSA: #define __PTRDIFF_MAX__ 2147483647
+// XTENSA: #define __PTRDIFF_TYPE__ int
+// XTENSA: #define __PTRDIFF_WIDTH__ 32
+// XTENSA: #define __SCHAR_MAX__ 127
+// XTENSA: #define __SHRT_MAX__ 32767
+// XTENSA: #define __SHRT_WIDTH__ 16
+// XTENSA: #define __SIG_ATOMIC_MAX__ 2147483647
+// XTENSA: #define __SIG_ATOMIC_WIDTH__ 32
+// XTENSA: #define __SIZEOF_DOUBLE__ 8
+// XTENSA: #define __SIZEOF_FLOAT__ 4
+// XTENSA: #define __SIZEOF_INT__ 4
+// XTENSA: #define __SIZEOF_LONG_DOUBLE__ 8
+// XTENSA: #define __SIZEOF_LONG_LONG__ 8
+// XTENSA: #define __SIZEOF_LONG__ 4
+// XTENSA: #define __SIZEOF_POINTER__ 4
+// XTENSA: #define __SIZEOF_PTRDIFF_T__ 4
+// XTENSA: #define __SIZEOF_SHORT__ 2
+// XTENSA: #define __SIZEOF_SIZE_T__ 4
+// XTENSA: #define __SIZEOF_WCHAR_T__ 4
+// XTENSA: #define __SIZEOF_WINT_T__ 4
+// XTENSA: #define __SIZE_MAX__ 4294967295U
+// XTENSA: #define __SIZE_TYPE__ unsigned int
+// XTENSA: #define __SIZE_WIDTH__ 32
+// XTENSA: #define __STDC_EMBED_EMPTY__ 2
+// XTENSA: #define __STDC_EMBED_FOUND__ 1
+// XTENSA: #define __STDC_EMBED_NOT_FOUND__ 0
+// XTENSA: #define __STDC_HOSTED__ 0
+// XTENSA: #define __STDC_UTF_16__ 1
+// XTENSA: #define __STDC_UTF_32__ 1
+// XTENSA: #define __STDC_VERSION__ 201710L
+// XTENSA: #define __STDC__ 1
+// XTENSA: #define __UINT16_C_SUFFIX__
+// XTENSA: #define __UINT16_MAX__ 65535
+// XTENSA: #define __UINT16_TYPE__ unsigned short
+// XTENSA: #define __UINT32_C_SUFFIX__ U
+// XTENSA: #define __UINT32_MAX__ 4294967295U
+// XTENSA: #define __UINT32_TYPE__ unsigned int
+// XTENSA: #define __UINT64_C_SUFFIX__ ULL
+// XTENSA: #define __UINT64_MAX__ 18446744073709551615ULL
+// XTENSA: #define __UINT64_TYPE__ long long unsigned int
+// XTENSA: #define __UINT8_C_SUFFIX__
+// XTENSA: #define __UINT8_MAX__ 255
+// XTENSA: #define __UINT8_TYPE__ unsigned char
+// XTENSA: #define __UINTMAX_C_SUFFIX__ ULL
+// XTENSA: #define __UINTMAX_MAX__ 18446744073709551615ULL
+// XTENSA: #define __UINTMAX_TYPE__ long long unsigned int
+// XTENSA: #define __UINTMAX_WIDTH__ 64
+// XTENSA: #define __UINTPTR_MAX__ 4294967295U
+// XTENSA: #define __UINTPTR_TYPE__ unsigned int
+// XTENSA: #define __UINTPTR_WIDTH__ 32
+// XTENSA: #define __UINT_FAST16_MAX__ 65535
+// XTENSA: #define __UINT_FAST16_TYPE__ unsigned short
+// XTENSA: #define __UINT_FAST32_MAX__ 4294967295U
+// XTENSA: #define __UINT_FAST32_TYPE__ unsigned int
+// XTENSA: #define __UINT_FAST64_MAX__ 18446744073709551615ULL
+// XTENSA: #define __UINT_FAST64_TYPE__ long long unsigned int
+// XTENSA: #define __UINT_FAST8_MAX__ 255
+// XTENSA: #define __UINT_FAST8_TYPE__ unsigned char
+// XTENSA: #define __UINT_LEAST16_MAX__ 65535
+// XTENSA: #define __UINT_LEAST16_TYPE__ unsigned short
+// XTENSA: #define __UINT_LEAST32_MAX__ 4294967295U
+// XTENSA: #define __UINT_LEAST32_TYPE__ unsigned int
+// XTENSA: #define __UINT_LEAST64_MAX__ 18446744073709551615ULL
+// XTENSA: #define __UINT_LEAST64_TYPE__ long long unsigned int
+// XTENSA: #define __UINT_LEAST8_MAX__ 255
+// XTENSA: #define __UINT_LEAST8_TYPE__ unsigned char
+// XTENSA: #define __USER_LABEL_PREFIX__
+// XTENSA: #define __WCHAR_MAX__ 2147483647
+// XTENSA: #define __WCHAR_TYPE__ int
+// XTENSA: #define __WCHAR_WIDTH__ 32
+// XTENSA: #define __WINT_MAX__ 4294967295U
+// XTENSA: #define __WINT_TYPE__ unsigned int
+// XTENSA: #define __WINT_UNSIGNED__ 1
+// XTENSA: #define __WINT_WIDTH__ 32
+// XTENSA: #define __XCHAL_HAVE_ABS 1
+// XTENSA: #define __XCHAL_HAVE_ADDX 1
+// XTENSA: #define __XCHAL_HAVE_BE 0
+// XTENSA: #define __XCHAL_HAVE_BOOLEANS 0
+// XTENSA: #define __XCHAL_HAVE_DEBUG 0
+// XTENSA: #define __XCHAL_HAVE_DENSITY 0
+// XTENSA: #define __XCHAL_HAVE_DIV32 0
+// XTENSA: #define __XCHAL_HAVE_FP 0
+// XTENSA: #define __XCHAL_HAVE_FP_DIV 0
+// XTENSA: #define __XCHAL_HAVE_FP_POSTINC 0
+// XTENSA: #define __XCHAL_HAVE_FP_RECIP 0
+// XTENSA: #define __XCHAL_HAVE_FP_RSQRT 0
+// XTENSA: #define __XCHAL_HAVE_FP_SQRT 0
+// XTENSA: #define __XCHAL_HAVE_L32R 1
+// XTENSA: #define __XCHAL_HAVE_LOOPS 0
+// XTENSA: #define __XCHAL_HAVE_MAC16 0
+// XTENSA: #define __XCHAL_HAVE_MINMAX 0
+// XTENSA: #define __XCHAL_HAVE_MUL16 0
+// XTENSA: #define __XCHAL_HAVE_MUL32 0
+// XTENSA: #define __XCHAL_HAVE_MUL32_HIGH 0
+// XTENSA: #define __XCHAL_HAVE_NSA 0
+// XTENSA: #define __XCHAL_HAVE_S32C1I 0
+// XTENSA: #define __XCHAL_HAVE_SEXT 0
+// XTENSA: #define __XCHAL_HAVE_THREADPTR 0
+// XTENSA: #define __XCHAL_HAVE_WINDOWED 0
+// XTENSA: #define __XTENSA_CALL0_ABI__ 1
+// XTENSA: #define __XTENSA_EL__ 1
+// XTENSA: #define __XTENSA_SOFT_FLOAT__ 1
+// XTENSA: #define __XTENSA__ 1
+// XTENSA: #define __xtensa__ 1
\ No newline at end of file
diff --git a/clang/test/Preprocessor/stdint.c b/clang/test/Preprocessor/stdint.c
index 7cb33ed54739a2..af1d6983fd9956 100644
--- a/clang/test/Preprocessor/stdint.c
+++ b/clang/test/Preprocessor/stdint.c
@@ -1498,6 +1498,113 @@
// XCORE:INTMAX_C_(0) 0LL
// XCORE:UINTMAX_C_(0) 0ULL
//
+// RUN: %clang_cc1 -E -ffreestanding -triple=xtensa %s | FileCheck -check-prefix XTENSA %s
+//
+// XTENSA:typedef long long int int64_t;
+// XTENSA:typedef long long unsigned int uint64_t;
+// XTENSA:typedef int64_t int_least64_t;
+// XTENSA:typedef uint64_t uint_least64_t;
+// XTENSA:typedef int64_t int_fast64_t;
+// XTENSA:typedef uint64_t uint_fast64_t;
+//
+// XTENSA:typedef int int32_t;
+// XTENSA:typedef unsigned int uint32_t;
+// XTENSA:typedef int32_t int_least32_t;
+// XTENSA:typedef uint32_t uint_least32_t;
+// XTENSA:typedef int32_t int_fast32_t;
+// XTENSA:typedef uint32_t uint_fast32_t;
+//
+// XTENSA:typedef short int16_t;
+// XTENSA:typedef unsigned short uint16_t;
+// XTENSA:typedef int16_t int_least16_t;
+// XTENSA:typedef uint16_t uint_least16_t;
+// XTENSA:typedef int16_t int_fast16_t;
+// XTENSA:typedef uint16_t uint_fast16_t;
+//
+// XTENSA:typedef signed char int8_t;
+// XTENSA:typedef unsigned char uint8_t;
+// XTENSA:typedef int8_t int_least8_t;
+// XTENSA:typedef uint8_t uint_least8_t;
+// XTENSA:typedef int8_t int_fast8_t;
+// XTENSA:typedef uint8_t uint_fast8_t;
+//
+// XTENSA:typedef int intptr_t;
+// XTENSA:typedef unsigned int uintptr_t;
+//
+// XTENSA:typedef long long int intmax_t;
+// XTENSA:typedef long long unsigned int uintmax_t;
+//
+// XTENSA:INT8_MAX_ 127
+// XTENSA:INT8_MIN_ (-127 -1)
+// XTENSA:UINT8_MAX_ 255
+// XTENSA:INT_LEAST8_MIN_ (-127 -1)
+// XTENSA:INT_LEAST8_MAX_ 127
+// XTENSA:UINT_LEAST8_MAX_ 255
+// XTENSA:INT_FAST8_MIN_ (-127 -1)
+// XTENSA:INT_FAST8_MAX_ 127
+// XTENSA:UINT_FAST8_MAX_ 255
+//
+// XTENSA:INT16_MAX_ 32767
+// XTENSA:INT16_MIN_ (-32767 -1)
+// XTENSA:UINT16_MAX_ 65535
+// XTENSA:INT_LEAST16_MIN_ (-32767 -1)
+// XTENSA:INT_LEAST16_MAX_ 32767
+// XTENSA:UINT_LEAST16_MAX_ 65535
+// XTENSA:INT_FAST16_MIN_ (-32767 -1)
+// XTENSA:INT_FAST16_MAX_ 32767
+// XTENSA:UINT_FAST16_MAX_ 65535
+//
+// XTENSA:INT32_MAX_ 2147483647
+// XTENSA:INT32_MIN_ (-2147483647 -1)
+// XTENSA:UINT32_MAX_ 4294967295U
+// XTENSA:INT_LEAST32_MIN_ (-2147483647 -1)
+// XTENSA:INT_LEAST32_MAX_ 2147483647
+// XTENSA:UINT_LEAST32_MAX_ 4294967295U
+// XTENSA:INT_FAST32_MIN_ (-2147483647 -1)
+// XTENSA:INT_FAST32_MAX_ 2147483647
+// XTENSA:UINT_FAST32_MAX_ 4294967295U
+//
+// XTENSA:INT64_MAX_ 9223372036854775807LL
+// XTENSA:INT64_MIN_ (-9223372036854775807LL -1)
+// XTENSA:UINT64_MAX_ 18446744073709551615ULL
+// XTENSA:INT_LEAST64_MIN_ (-9223372036854775807LL -1)
+// XTENSA:INT_LEAST64_MAX_ 9223372036854775807LL
+// XTENSA:UINT_LEAST64_MAX_ 18446744073709551615ULL
+// XTENSA:INT_FAST64_MIN_ (-9223372036854775807LL -1)
+// XTENSA:INT_FAST64_MAX_ 9223372036854775807LL
+// XTENSA:UINT_FAST64_MAX_ 18446744073709551615ULL
+//
+// XTENSA:INTPTR_MIN_ (-2147483647 -1)
+// XTENSA:INTPTR_MAX_ 2147483647
+// XTENSA:UINTPTR_MAX_ 4294967295U
+// XTENSA:PTRDIFF_MIN_ (-2147483647 -1)
+// XTENSA:PTRDIFF_MAX_ 2147483647
+// XTENSA:SIZE_MAX_ 4294967295U
+//
+// XTENSA:INTMAX_MIN_ (-9223372036854775807LL -1)
+// XTENSA:INTMAX_MAX_ 9223372036854775807LL
+// XTENSA:UINTMAX_MAX_ 18446744073709551615ULL
+//
+// XTENSA:SIG_ATOMIC_MIN_ (-2147483647 -1)
+// XTENSA:SIG_ATOMIC_MAX_ 2147483647
+// XTENSA:WINT_MIN_ 0U
+// XTENSA:WINT_MAX_ 4294967295U
+//
+// XTENSA:WCHAR_MAX_ 2147483647
+// XTENSA:WCHAR_MIN_ (-2147483647 -1)
+//
+// XTENSA:INT8_C_(0) 0
+// XTENSA:UINT8_C_(0) 0U
+// XTENSA:INT16_C_(0) 0
+// XTENSA:UINT16_C_(0) 0U
+// XTENSA:INT32_C_(0) 0
+// XTENSA:UINT32_C_(0) 0U
+// XTENSA:INT64_C_(0) 0LL
+// XTENSA:UINT64_C_(0) 0ULL
+//
+// XTENSA:INTMAX_C_(0) 0LL
+// XTENSA:UINTMAX_C_(0) 0ULL
+//
//
// stdint.h forms several macro definitions by pasting together identifiers
// to form names (eg. int32_t is formed from int ## 32 ## _t). The following
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