[clang] [llvm] Changed the __ARM_ARCH macro to match the definition in the ACLE. (PR #79583)
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Fri Jan 26 03:51:13 PST 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-backend-arm
@llvm/pr-subscribers-backend-aarch64
Author: James Westwood (jwestwood921)
<details>
<summary>Changes</summary>
Added functionality to the ARMTargetParser to obtain the minor version of each architecture, and amended ARM.cpp and AArch64.cpp to define __ARM_ARCH correctly.
In ACLE 5.4.1, __ARM_ARCH is defined as equal to the major architecture version for ISAs up to and including v8. From v8.1 onwards, it's definition is changed to include minor versions, such that for an architecture vX.Y, __ARM_ARCH = X*100 + Y.
---
Full diff: https://github.com/llvm/llvm-project/pull/79583.diff
7 Files Affected:
- (modified) clang/lib/Basic/Targets/AArch64.cpp (+15-2)
- (modified) clang/lib/Basic/Targets/ARM.cpp (+12-3)
- (modified) clang/lib/Basic/Targets/ARM.h (+1)
- (modified) clang/test/Preprocessor/arm-target-features.c (+16-16)
- (modified) llvm/include/llvm/TargetParser/ARMTargetParser.h (+1)
- (modified) llvm/lib/TargetParser/ARMTargetParser.cpp (+60)
- (modified) llvm/unittests/TargetParser/TargetParserTest.cpp (+8)
``````````diff
diff --git a/clang/lib/Basic/Targets/AArch64.cpp b/clang/lib/Basic/Targets/AArch64.cpp
index d47181bfca4fc8..7d0f879b3daee6 100644
--- a/clang/lib/Basic/Targets/AArch64.cpp
+++ b/clang/lib/Basic/Targets/AArch64.cpp
@@ -368,8 +368,21 @@ void AArch64TargetInfo::getTargetDefines(const LangOptions &Opts,
// ACLE predefines. Many can only have one possible value on v8 AArch64.
Builder.defineMacro("__ARM_ACLE", "200");
- Builder.defineMacro("__ARM_ARCH",
- std::to_string(ArchInfo->Version.getMajor()));
+
+ // ACLE 5.4.1 ARM/Thumb instruction set architecture
+ // __ARM_ARCH is defined as an integer value indicating the current ARM ISA.
+ // For ISAs up to and including v8, __ARM_ARCH is equal to the major version
+ // number. For ISAs from v8.1 onwards, __ARM_ARCH is scaled up to include the
+ // minor version number, e.g. for ARM architecture ARMvX.Y:
+ // __ARM_ARCH = X * 100 + Y.
+ if (ArchInfo->Version.getMajor() == 8 && ArchInfo->Version.getMinor() == 0)
+ Builder.defineMacro("__ARM_ARCH",
+ std::to_string(ArchInfo->Version.getMajor()));
+ else
+ Builder.defineMacro("__ARM_ARCH",
+ std::to_string(ArchInfo->Version.getMajor() * 100 +
+ ArchInfo->Version.getMinor().value()));
+
Builder.defineMacro("__ARM_ARCH_PROFILE",
std::string("'") + (char)ArchInfo->Profile + "'");
diff --git a/clang/lib/Basic/Targets/ARM.cpp b/clang/lib/Basic/Targets/ARM.cpp
index 55b71557452fa0..9ac558caa2886a 100644
--- a/clang/lib/Basic/Targets/ARM.cpp
+++ b/clang/lib/Basic/Targets/ARM.cpp
@@ -130,6 +130,7 @@ void ARMTargetInfo::setArchInfo(llvm::ARM::ArchKind Kind) {
SubArch = llvm::ARM::getSubArch(ArchKind);
ArchProfile = llvm::ARM::parseArchProfile(SubArch);
ArchVersion = llvm::ARM::parseArchVersion(SubArch);
+ ArchMinorVersion = llvm::ARM::parseArchMinorVersion(SubArch);
// cache CPU related strings
CPUAttr = getCPUAttr();
@@ -736,9 +737,17 @@ void ARMTargetInfo::getTargetDefines(const LangOptions &Opts,
if (!CPUAttr.empty())
Builder.defineMacro("__ARM_ARCH_" + CPUAttr + "__");
- // ACLE 6.4.1 ARM/Thumb instruction set architecture
- // __ARM_ARCH is defined as an integer value indicating the current ARM ISA
- Builder.defineMacro("__ARM_ARCH", Twine(ArchVersion));
+ // ACLE 5.4.1 ARM/Thumb instruction set architecture
+ // __ARM_ARCH is defined as an integer value indicating the current ARM ISA.
+ // For ISAs up to and including v8, __ARM_ARCH is equal to the major version
+ // number. For ISAs from v8.1 onwards, __ARM_ARCH is scaled up to include the
+ // minor version number, e.g. for ARM architecture ARMvX.Y:
+ // __ARM_ARCH = X * 100 + Y.
+ if (ArchVersion >= 9 || ArchMinorVersion != 0)
+ Builder.defineMacro("__ARM_ARCH",
+ Twine(ArchVersion * 100 + ArchMinorVersion));
+ else
+ Builder.defineMacro("__ARM_ARCH", Twine(ArchVersion));
if (ArchVersion >= 8) {
// ACLE 6.5.7 Crypto Extension
diff --git a/clang/lib/Basic/Targets/ARM.h b/clang/lib/Basic/Targets/ARM.h
index 9802eb01abf3c4..9c4bd299f67339 100644
--- a/clang/lib/Basic/Targets/ARM.h
+++ b/clang/lib/Basic/Targets/ARM.h
@@ -60,6 +60,7 @@ class LLVM_LIBRARY_VISIBILITY ARMTargetInfo : public TargetInfo {
llvm::ARM::ArchKind ArchKind = llvm::ARM::ArchKind::ARMV4T;
llvm::ARM::ProfileKind ArchProfile;
unsigned ArchVersion;
+ unsigned ArchMinorVersion;
unsigned FPU : 5;
unsigned MVE : 2;
diff --git a/clang/test/Preprocessor/arm-target-features.c b/clang/test/Preprocessor/arm-target-features.c
index 236c9f2479b705..2122082760b6f6 100644
--- a/clang/test/Preprocessor/arm-target-features.c
+++ b/clang/test/Preprocessor/arm-target-features.c
@@ -737,7 +737,7 @@
// Test whether predefines are as expected when targeting cortex-m55 (softfp FP ABI as default).
// RUN: %clang -target arm-eabi -mcpu=cortex-m55 -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=M55 %s
-// M55: #define __ARM_ARCH 8
+// M55: #define __ARM_ARCH 801
// M55: #define __ARM_ARCH_8_1M_MAIN__ 1
// M55: #define __ARM_ARCH_EXT_IDIV__ 1
// M55-NOT: __ARM_ARCH_ISA_ARM
@@ -764,7 +764,7 @@
// KRAIT-ALLOW-FP-INSTR:#define __ARM_VFPV4__ 1
// RUN: %clang -target arm-arm-none-eabi -march=armv8.1-m.main -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V81M %s
-// CHECK-V81M: #define __ARM_ARCH 8
+// CHECK-V81M: #define __ARM_ARCH 801
// CHECK-V81M: #define __ARM_ARCH_8_1M_MAIN__ 1
// CHECK-V81M: #define __ARM_ARCH_ISA_THUMB 2
// CHECK-V81M: #define __ARM_ARCH_PROFILE 'M'
@@ -821,14 +821,14 @@
// CHECK-V8M-CDE-MASK2: #define __ARM_FEATURE_CDE_COPROC 0xff
// RUN: %clang -target armv8.1a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V81A %s
-// CHECK-V81A: #define __ARM_ARCH 8
+// CHECK-V81A: #define __ARM_ARCH 801
// CHECK-V81A: #define __ARM_ARCH_8_1A__ 1
// CHECK-V81A: #define __ARM_ARCH_PROFILE 'A'
// CHECK-V81A: #define __ARM_FEATURE_QRDMX 1
// CHECK-V81A: #define __ARM_FP 0xe
// RUN: %clang -target armv8.2a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V82A %s
-// CHECK-V82A: #define __ARM_ARCH 8
+// CHECK-V82A: #define __ARM_ARCH 802
// CHECK-V82A: #define __ARM_ARCH_8_2A__ 1
// CHECK-V82A: #define __ARM_ARCH_PROFILE 'A'
// CHECK-V82A: #define __ARM_FEATURE_QRDMX 1
@@ -838,62 +838,62 @@
// CHECK-DRIVERKIT-NOT: #define __ARM_PCS_VFP 1
// RUN: %clang -target armv8.3a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V83A %s
-// CHECK-V83A: #define __ARM_ARCH 8
+// CHECK-V83A: #define __ARM_ARCH 803
// CHECK-V83A: #define __ARM_ARCH_8_3A__ 1
// CHECK-V83A: #define __ARM_ARCH_PROFILE 'A'
// RUN: %clang -target armv8.4a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V84A %s
-// CHECK-V84A: #define __ARM_ARCH 8
+// CHECK-V84A: #define __ARM_ARCH 804
// CHECK-V84A: #define __ARM_ARCH_8_4A__ 1
// CHECK-V84A: #define __ARM_ARCH_PROFILE 'A'
// RUN: %clang -target armv8.5a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V85A %s
-// CHECK-V85A: #define __ARM_ARCH 8
+// CHECK-V85A: #define __ARM_ARCH 805
// CHECK-V85A: #define __ARM_ARCH_8_5A__ 1
// CHECK-V85A: #define __ARM_ARCH_PROFILE 'A'
// RUN: %clang -target armv8.6a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V86A %s
-// CHECK-V86A: #define __ARM_ARCH 8
+// CHECK-V86A: #define __ARM_ARCH 806
// CHECK-V86A: #define __ARM_ARCH_8_6A__ 1
// CHECK-V86A: #define __ARM_ARCH_PROFILE 'A'
// RUN: %clang -target armv8.7a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V87A %s
-// CHECK-V87A: #define __ARM_ARCH 8
+// CHECK-V87A: #define __ARM_ARCH 807
// CHECK-V87A: #define __ARM_ARCH_8_7A__ 1
// CHECK-V87A: #define __ARM_ARCH_PROFILE 'A'
// RUN: %clang -target armv8.8a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V88A %s
-// CHECK-V88A: #define __ARM_ARCH 8
+// CHECK-V88A: #define __ARM_ARCH 808
// CHECK-V88A: #define __ARM_ARCH_8_8A__ 1
// CHECK-V88A: #define __ARM_ARCH_PROFILE 'A'
// RUN: %clang -target armv8.9a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V89A %s
-// CHECK-V89A: #define __ARM_ARCH 8
+// CHECK-V89A: #define __ARM_ARCH 809
// CHECK-V89A: #define __ARM_ARCH_8_9A__ 1
// CHECK-V89A: #define __ARM_ARCH_PROFILE 'A'
// RUN: %clang -target armv9a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V9A %s
-// CHECK-V9A: #define __ARM_ARCH 9
+// CHECK-V9A: #define __ARM_ARCH 900
// CHECK-V9A: #define __ARM_ARCH_9A__ 1
// CHECK-V9A: #define __ARM_ARCH_PROFILE 'A'
// RUN: %clang -target armv9.1a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V91A %s
-// CHECK-V91A: #define __ARM_ARCH 9
+// CHECK-V91A: #define __ARM_ARCH 901
// CHECK-V91A: #define __ARM_ARCH_9_1A__ 1
// CHECK-V91A: #define __ARM_ARCH_PROFILE 'A'
// RUN: %clang -target armv9.2a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V92A %s
-// CHECK-V92A: #define __ARM_ARCH 9
+// CHECK-V92A: #define __ARM_ARCH 902
// CHECK-V92A: #define __ARM_ARCH_9_2A__ 1
// CHECK-V92A: #define __ARM_ARCH_PROFILE 'A'
// RUN: %clang -target armv9.3a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V93A %s
-// CHECK-V93A: #define __ARM_ARCH 9
+// CHECK-V93A: #define __ARM_ARCH 903
// CHECK-V93A: #define __ARM_ARCH_9_3A__ 1
// CHECK-V93A: #define __ARM_ARCH_PROFILE 'A'
// RUN: %clang -target armv9.4a-none-none-eabi -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V94A %s
-// CHECK-V94A: #define __ARM_ARCH 9
+// CHECK-V94A: #define __ARM_ARCH 904
// CHECK-V94A: #define __ARM_ARCH_9_4A__ 1
// CHECK-V94A: #define __ARM_ARCH_PROFILE 'A'
diff --git a/llvm/include/llvm/TargetParser/ARMTargetParser.h b/llvm/include/llvm/TargetParser/ARMTargetParser.h
index c42d66f048fccc..ec3817134a5ac0 100644
--- a/llvm/include/llvm/TargetParser/ARMTargetParser.h
+++ b/llvm/include/llvm/TargetParser/ARMTargetParser.h
@@ -258,6 +258,7 @@ uint64_t parseArchExt(StringRef ArchExt);
ArchKind parseCPUArch(StringRef CPU);
ProfileKind parseArchProfile(StringRef Arch);
unsigned parseArchVersion(StringRef Arch);
+unsigned parseArchMinorVersion(StringRef Arch);
void fillValidCPUArchList(SmallVectorImpl<StringRef> &Values);
StringRef computeDefaultTargetABI(const Triple &TT, StringRef CPU);
diff --git a/llvm/lib/TargetParser/ARMTargetParser.cpp b/llvm/lib/TargetParser/ARMTargetParser.cpp
index 67f937ebc33f9f..dfbc2ff57ad16b 100644
--- a/llvm/lib/TargetParser/ARMTargetParser.cpp
+++ b/llvm/lib/TargetParser/ARMTargetParser.cpp
@@ -94,6 +94,66 @@ unsigned ARM::parseArchVersion(StringRef Arch) {
llvm_unreachable("Unhandled architecture");
}
+unsigned ARM::parseArchMinorVersion(StringRef Arch) {
+ Arch = getCanonicalArchName(Arch);
+ switch (parseArch(Arch)) {
+ case ArchKind::ARMV4:
+ case ArchKind::ARMV4T:
+ case ArchKind::ARMV5T:
+ case ArchKind::ARMV5TE:
+ case ArchKind::IWMMXT:
+ case ArchKind::IWMMXT2:
+ case ArchKind::XSCALE:
+ case ArchKind::ARMV5TEJ:
+ case ArchKind::ARMV6:
+ case ArchKind::ARMV6K:
+ case ArchKind::ARMV6T2:
+ case ArchKind::ARMV6KZ:
+ case ArchKind::ARMV6M:
+ case ArchKind::ARMV7A:
+ case ArchKind::ARMV7VE:
+ case ArchKind::ARMV7R:
+ case ArchKind::ARMV7AR:
+ case ArchKind::ARMV7M:
+ case ArchKind::ARMV7S:
+ case ArchKind::ARMV7EM:
+ case ArchKind::ARMV7K:
+ case ArchKind::ARMV8AR:
+ case ArchKind::ARMV8A:
+ case ArchKind::ARMV8R:
+ case ArchKind::ARMV8MBaseline:
+ case ArchKind::ARMV8MMainline:
+ case ArchKind::ARMV9A:
+ case ArchKind::INVALID:
+ return 0;
+ case ArchKind::ARMV8_1A:
+ case ArchKind::ARMV8_1MMainline:
+ case ArchKind::ARMV9_1A:
+ return 1;
+ case ArchKind::ARMV8_2A:
+ case ArchKind::ARMV8_2MMainline:
+ case ArchKind::ARMV9_2A:
+ return 2;
+ case ArchKind::ARMV8_3A:
+ case ArchKind::ARMV9_3A:
+ return 3;
+ case ArchKind::ARMV8_4A:
+ case ArchKind::ARMV9_4A:
+ return 4;
+ case ArchKind::ARMV8_5A:
+ return 5;
+ case ArchKind::ARMV8_6A:
+ return 6;
+ case ArchKind::ARMV8_7A:
+ return 7;
+ case ArchKind::ARMV8_8A:
+ return 8;
+ case ArchKind::ARMV8_9A:
+ return 9;
+ }
+ llvm_unreachable("Unhandled architecture");
+}
+
static ARM::ProfileKind getProfileKind(ARM::ArchKind AK) {
switch (AK) {
case ARM::ArchKind::ARMV6M:
diff --git a/llvm/unittests/TargetParser/TargetParserTest.cpp b/llvm/unittests/TargetParser/TargetParserTest.cpp
index d31fcd1bb1b00d..e3de01c18d6576 100644
--- a/llvm/unittests/TargetParser/TargetParserTest.cpp
+++ b/llvm/unittests/TargetParser/TargetParserTest.cpp
@@ -961,6 +961,14 @@ TEST(TargetParserTest, ARMparseArchVersion) {
EXPECT_EQ(5u, ARM::parseArchVersion(ARMArch[i]));
}
+TEST(TargetParserTest, ARMparseArchMinorVersion) {
+ for (unsigned i = 0; i < std::size(ARMArch); i++)
+ if (((std::string)ARMArch[i]).find(".") == 5)
+ EXPECT_EQ((ARMArch[i][6] - 48u), ARM::parseArchMinorVersion(ARMArch[i]));
+ else
+ EXPECT_EQ(0u, ARM::parseArchMinorVersion(ARMArch[i]));
+}
+
TEST(TargetParserTest, getARMCPUForArch) {
// Platform specific defaults.
{
``````````
</details>
https://github.com/llvm/llvm-project/pull/79583
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