From 650785c718b29496548b06bd043eb03887a182d1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Wed, 7 Aug 2024 02:04:59 +0200
Subject: [PATCH 1/3] target: Fix hasLlvmSupport() for dxil, spirv[32,64], and
 kalimba.

---
 src/target.zig | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/target.zig b/src/target.zig
index 768e4d957e..b9ff8ba5be 100644
--- a/src/target.zig
+++ b/src/target.zig
@@ -119,7 +119,6 @@ pub fn hasLlvmSupport(target: std.Target, ofmt: std.Target.ObjectFormat) bool {
         .bpfel,
         .bpfeb,
         .csky,
-        .dxil,
         .hexagon,
         .loongarch32,
         .loongarch64,
@@ -147,17 +146,23 @@ pub fn hasLlvmSupport(target: std.Target, ofmt: std.Target.ObjectFormat) bool {
         .xtensa,
         .nvptx,
         .nvptx64,
-        .spirv,
-        .spirv32,
-        .spirv64,
-        .kalimba,
         .lanai,
         .wasm32,
         .wasm64,
         .ve,
         => true,
 
-        .spu_2 => false,
+        // An LLVM backend exists but we don't currently support using it.
+        .dxil,
+        .spirv,
+        .spirv32,
+        .spirv64,
+        => false,
+
+        // No LLVM backend exists.
+        .kalimba,
+        .spu_2,
+        => false,
     };
 }
 

From a9f68410d0a6dd4c2509cf897b283c7ab8f97bdd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Wed, 7 Aug 2024 02:05:43 +0200
Subject: [PATCH 2/3] llvm: Clarify in initializeLLVMTarget() that there's no
 kalimba backend.

---
 src/codegen/llvm.zig | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig
index 23e39caa98..6c78fcfe37 100644
--- a/src/codegen/llvm.zig
+++ b/src/codegen/llvm.zig
@@ -12083,14 +12083,16 @@ pub fn initializeLLVMTarget(arch: std.Target.Cpu.Arch) void {
             llvm.LLVMInitializeLoongArchAsmParser();
         },
 
-        // LLVM backends that have no initialization functions.
+        // We don't currently support using these backends.
         .spirv,
         .spirv32,
         .spirv64,
-        .kalimba,
         .dxil,
         => {},
 
-        .spu_2 => unreachable, // LLVM does not support this backend
+        // LLVM does does not have a backend for these.
+        .kalimba,
+        .spu_2,
+        => unreachable,
     }
 }

From 746f20d21fcd6a0a9ccbf662cd381f16c5064cd6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Wed, 7 Aug 2024 02:08:34 +0200
Subject: [PATCH 3/3] llvm: Use unreachable in targetTriple() for targets
 without LLVM support.

---
 src/codegen/llvm.zig | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig
index 6c78fcfe37..621490f7c7 100644
--- a/src/codegen/llvm.zig
+++ b/src/codegen/llvm.zig
@@ -81,12 +81,14 @@ pub fn targetTriple(allocator: Allocator, target: std.Target) ![]const u8 {
         .spirv => "spirv",
         .spirv32 => "spirv32",
         .spirv64 => "spirv64",
-        .kalimba => "kalimba",
         .lanai => "lanai",
         .wasm32 => "wasm32",
         .wasm64 => "wasm64",
         .ve => "ve",
-        .spu_2 => return error.@"LLVM backend does not support SPU Mark II",
+
+        .kalimba,
+        .spu_2,
+        => unreachable, // Gated by hasLlvmSupport().
     };
     try llvm_triple.appendSlice(llvm_arch);
     try llvm_triple.appendSlice("-unknown-");