Update builder to do Halide 18 releases + HALIDE_MAIN -> 19.0.0 (#288)

master/master.cfg

@@ -88,29 +88,33 @@ LLVM_BRANCHES = {LLVM_MAIN: VersionedBranch(ref='main', version=Version(19, 0, 0
 # (Note that there are older releases of Halide that we no longer bother to build/test regularly.)
 
 HALIDE_MAIN = 'main'
+HALIDE_RELEASE_18 = 'release_18'
 HALIDE_RELEASE_17 = 'release_17'
 HALIDE_RELEASE_16 = 'release_16'
 
 _HALIDE_RELEASES = [
+    HALIDE_RELEASE_18,
     HALIDE_RELEASE_17,
     HALIDE_RELEASE_16,
 ]
 
-HALIDE_BRANCHES = {HALIDE_MAIN: VersionedBranch(ref='main', version=Version(18, 0, 0)),
+HALIDE_BRANCHES = {HALIDE_MAIN: VersionedBranch(ref='main', version=Version(19, 0, 0)),
+                   HALIDE_RELEASE_18: VersionedBranch(ref='release/18.x', version=Version(18, 0, 0)),
                    HALIDE_RELEASE_17: VersionedBranch(ref='release/17.x', version=Version(17, 0, 2)),
                    HALIDE_RELEASE_16: VersionedBranch(ref='release/16.x', version=Version(16, 0, 6))}
 
 # This lists the Halide branch(es) for which we want to build nightlies;
 # it's usually desirable to constrain these to save buildbot time (esp on the slower bots)
 # and avoid branches that aren't changing much (i.e. -- recent releases that aren't
 # likely to need new updates soon).
-HALIDE_NIGHTLIES = [HALIDE_MAIN, HALIDE_RELEASE_17]
+HALIDE_NIGHTLIES = [HALIDE_MAIN, HALIDE_RELEASE_18, HALIDE_RELEASE_17]
 
 # Given a halide branch, return the 'native' llvm version we expect to use with it.
 # For halide release branches, this is the corresponding llvm release branch; for
 # halide main, it's llvm main.
 LLVM_FOR_HALIDE = {
     HALIDE_MAIN: [LLVM_MAIN, LLVM_RELEASE_18, LLVM_RELEASE_17],
+    HALIDE_RELEASE_18: [LLVM_RELEASE_18],
     HALIDE_RELEASE_17: [LLVM_RELEASE_17],
     HALIDE_RELEASE_16: [LLVM_RELEASE_16],
 }
@@ -358,7 +362,7 @@ class BuilderType:
         # return (self.arch == 'x86'
         #        and self.bits == 64
         #        and self.os == 'linux'
-        #        and self.halide_branch in [HALIDE_MAIN, HALIDE_RELEASE_17])
+        #        and self.halide_branch in [HALIDE_MAIN, HALIDE_RELEASE_18, HALIDE_RELEASE_17])
 
     def handles_webgpu(self):
         # At the moment, the WebGPU team recommends the OSX versions of Dawn/Node
@@ -2024,9 +2028,11 @@ def prioritize_builders(buildmaster, builders):
             return 2
         if builder_type.llvm_branch in LLVM_FOR_HALIDE[HALIDE_RELEASE_17]:
             return 3
-        if builder_type.llvm_branch in LLVM_FOR_HALIDE[HALIDE_MAIN]:
+        if builder_type.llvm_branch in LLVM_FOR_HALIDE[HALIDE_RELEASE_18]:
             return 4
-        return 5
+        if builder_type.llvm_branch in LLVM_FOR_HALIDE[HALIDE_MAIN]:
+            return 5
+        return 6
 
     return list(sorted(builders, key=importance))