Bump to 18.1.2

WORKSPACE

@@ -16,16 +16,17 @@ http_archive(
     ],
 )
 
-LLVM_COMMIT = "6009708b4367171ccdbf4b5905cb6a803753fe18"  # 17.0.6
-
-LLVM_SHA256 = "1b0dd2e445ebe7406f4982cb39de02f8c07f19e6ef2182e49164d9e6421dc9ec"
+LLVM_COMMIT = "26a1d6601d727a96f4301d0d8647b5a42760ae0c"  # 18.1.2
 
 http_archive(
     name = "llvm-raw",
     build_file = "//:BUILD.llvm-raw",
+    integrity = "sha256-KsQDkrF6dGhV2l68+BhEu26+Qvp1f7HaRnLnqiglfPM=",
     patch_args = ["-p1"],
-    patches = ["//:llvm.patch"],
-    sha256 = LLVM_SHA256,
+    patches = [
+        "//:llvm.patch",
+        "//:fix_RISCVGenMacroFusion_build.patch",
+    ],
     strip_prefix = "llvm-project-" + LLVM_COMMIT,
     urls = ["https://github.com/llvm/llvm-project/archive/{commit}.tar.gz".format(commit = LLVM_COMMIT)],
 )

fix_RISCVGenMacroFusion_build.patch

@@ -0,0 +1,12 @@
+diff --git a/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel b/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel
+index c3efe178d6ed6d..28f33bca3be004 100644
+--- a/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel
++++ b/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel
+@@ -2131,6 +2131,7 @@ llvm_target_lib_list = [lib for lib in [
+             ("-gen-dag-isel", "lib/Target/RISCV/RISCVGenDAGISel.inc"),
+             ("-gen-disassembler", "lib/Target/RISCV/RISCVGenDisassemblerTables.inc"),
+             ("-gen-instr-info", "lib/Target/RISCV/RISCVGenInstrInfo.inc"),
++            ("-gen-macro-fusion-pred", "lib/Target/RISCV/RISCVGenMacroFusion.inc"),
+             ("-gen-emitter", "lib/Target/RISCV/RISCVGenMCCodeEmitter.inc"),
+             ("-gen-pseudo-lowering", "lib/Target/RISCV/RISCVGenMCPseudoLowering.inc"),
+             ("-gen-register-bank", "lib/Target/RISCV/RISCVGenRegisterBank.inc"),