[llvm] Triple: Add constructor from enum entries (PR #190632)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm created https://github.com/llvm/llvm-project/pull/190632

Don't require hardcoding the string names.

>From c06752850d684c7f500fcf43027b6e8ffee03000 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault at amd.com>
Date: Mon, 6 Apr 2026 16:55:16 +0200
Subject: [PATCH] Triple: Add constructor from enum entries

Don't require hardcoding the string names.
---
 llvm/include/llvm/TargetParser/Triple.h    |  4 +++
 llvm/lib/TargetParser/Triple.cpp           |  7 ++++
 llvm/unittests/TargetParser/TripleTest.cpp | 40 ++++++++++++++++++++++
 3 files changed, 51 insertions(+)

diff --git a/llvm/include/llvm/TargetParser/Triple.h b/llvm/include/llvm/TargetParser/Triple.h
index 7c5aa52a1bd04..2e07b5a815a9b 100644
--- a/llvm/include/llvm/TargetParser/Triple.h
+++ b/llvm/include/llvm/TargetParser/Triple.h
@@ -375,6 +375,10 @@ class Triple {
                   const Twine &OSStr);
   LLVM_ABI Triple(const Twine &ArchStr, const Twine &VendorStr,
                   const Twine &OSStr, const Twine &EnvironmentStr);
+  LLVM_ABI Triple(ArchType A, SubArchType SA = NoSubArch,
+                  VendorType V = UnknownVendor, OSType OS = UnknownOS,
+                  EnvironmentType E = UnknownEnvironment,
+                  ObjectFormatType OF = UnknownObjectFormat);
 
   bool operator==(const Triple &Other) const {
     return Arch == Other.Arch && SubArch == Other.SubArch &&
diff --git a/llvm/lib/TargetParser/Triple.cpp b/llvm/lib/TargetParser/Triple.cpp
index 7a907808c0f34..44d7630f6a33b 100644
--- a/llvm/lib/TargetParser/Triple.cpp
+++ b/llvm/lib/TargetParser/Triple.cpp
@@ -1144,6 +1144,13 @@ Triple::Triple(const Twine &ArchStr, const Twine &VendorStr, const Twine &OSStr,
     ObjectFormat = getDefaultFormat(*this);
 }
 
+Triple::Triple(ArchType A, SubArchType SA, VendorType V, OSType OS,
+               EnvironmentType E, ObjectFormatType OF)
+    : Triple(getArchName(A, SA), getVendorTypeName(V), getOSTypeName(OS),
+             getEnvironmentTypeName(E)) {
+  setObjectFormat(OF);
+}
+
 static VersionTuple parseVersionFromName(StringRef Name);
 
 static StringRef getDXILArchNameFromShaderModel(StringRef ShaderModelStr) {
diff --git a/llvm/unittests/TargetParser/TripleTest.cpp b/llvm/unittests/TargetParser/TripleTest.cpp
index 5f83fdd0ba000..669c25663f3c4 100644
--- a/llvm/unittests/TargetParser/TripleTest.cpp
+++ b/llvm/unittests/TargetParser/TripleTest.cpp
@@ -1477,6 +1477,46 @@ TEST(TripleTest, ParsedIDs) {
   EXPECT_EQ(Triple::ChipStar, T.getOS());
 }
 
+TEST(TripleTest, EnumConstructor) {
+  {
+    Triple T(Triple::amdgcn, Triple::NoSubArch, Triple::AMD, Triple::AMDHSA,
+             Triple::LLVM, Triple::ELF);
+    EXPECT_EQ(T.getArch(), Triple::amdgcn);
+    EXPECT_EQ(T.getVendor(), Triple::AMD);
+    EXPECT_EQ(T.getOS(), Triple::AMDHSA);
+    EXPECT_EQ(T.getEnvironment(), Triple::LLVM);
+    EXPECT_EQ(T.getObjectFormat(), Triple::ELF);
+  }
+
+  {
+    Triple T(Triple::arm, Triple::ARMSubArch_v9_7a, Triple::PC, Triple::Linux,
+             Triple::GNU, Triple::COFF);
+    EXPECT_EQ(T.getArch(), Triple::arm);
+    EXPECT_EQ(T.getVendor(), Triple::PC);
+    EXPECT_EQ(T.getOS(), Triple::Linux);
+    EXPECT_EQ(T.getEnvironment(), Triple::GNU);
+    EXPECT_EQ(T.getObjectFormat(), Triple::COFF);
+  }
+
+  {
+    Triple T(Triple::x86_64);
+    EXPECT_EQ(T.getArch(), Triple::x86_64);
+    EXPECT_EQ(T.getVendor(), Triple::UnknownVendor);
+    EXPECT_EQ(T.getOS(), Triple::UnknownOS);
+    EXPECT_EQ(T.getEnvironment(), Triple::UnknownEnvironment);
+    EXPECT_EQ(T.getObjectFormat(), Triple::ELF);
+  }
+
+  {
+    Triple T(Triple::dxil);
+    EXPECT_EQ(T.getArch(), Triple::dxil);
+    EXPECT_EQ(T.getVendor(), Triple::UnknownVendor);
+    EXPECT_EQ(T.getOS(), Triple::UnknownOS);
+    EXPECT_EQ(T.getEnvironment(), Triple::UnknownEnvironment);
+    EXPECT_EQ(T.getObjectFormat(), Triple::DXContainer);
+  }
+}
+
 static std::string Join(StringRef A, StringRef B, StringRef C) {
   std::string Str = std::string(A);
   Str += '-';