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-rw-r--r--src/bootstrap/src/core/build_steps/llvm.rs2
-rw-r--r--src/bootstrap/src/core/builder/tests.rs17
-rw-r--r--src/bootstrap/src/lib.rs8
3 files changed, 24 insertions, 3 deletions
diff --git a/src/bootstrap/src/core/build_steps/llvm.rs b/src/bootstrap/src/core/build_steps/llvm.rs
index 4b2d3e9ab4b..afbbbb5bd26 100644
--- a/src/bootstrap/src/core/build_steps/llvm.rs
+++ b/src/bootstrap/src/core/build_steps/llvm.rs
@@ -98,7 +98,7 @@ pub fn prebuilt_llvm_config(
     let out_dir = builder.llvm_out(target);
 
     let mut llvm_config_ret_dir = builder.llvm_out(builder.config.build);
-    if !builder.config.build.is_msvc() || builder.ninja() {
+    if (!builder.config.build.is_msvc() || builder.ninja()) && !builder.config.llvm_from_ci {
         llvm_config_ret_dir.push("build");
     }
     llvm_config_ret_dir.push("bin");
diff --git a/src/bootstrap/src/core/builder/tests.rs b/src/bootstrap/src/core/builder/tests.rs
index 700ebcf5e37..2cbebbcf4e2 100644
--- a/src/bootstrap/src/core/builder/tests.rs
+++ b/src/bootstrap/src/core/builder/tests.rs
@@ -525,6 +525,23 @@ mod dist {
     }
 
     #[test]
+    fn llvm_out_behaviour() {
+        let mut config = configure(&["A"], &["B"]);
+        config.llvm_from_ci = true;
+        let build = Build::new(config.clone());
+
+        let target = TargetSelection::from_user("A");
+        assert!(build.llvm_out(target).ends_with("ci-llvm"));
+        let target = TargetSelection::from_user("B");
+        assert!(build.llvm_out(target).ends_with("llvm"));
+
+        config.llvm_from_ci = false;
+        let build = Build::new(config.clone());
+        let target = TargetSelection::from_user("A");
+        assert!(build.llvm_out(target).ends_with("llvm"));
+    }
+
+    #[test]
     fn build_with_empty_host() {
         let config = configure(&[], &["C"]);
         let build = Build::new(config);
diff --git a/src/bootstrap/src/lib.rs b/src/bootstrap/src/lib.rs
index 836684ca20a..36f9ee6aff6 100644
--- a/src/bootstrap/src/lib.rs
+++ b/src/bootstrap/src/lib.rs
@@ -792,12 +792,16 @@ impl Build {
         self.stage_out(compiler, mode).join(&*target.triple).join(self.cargo_dir())
     }
 
-    /// Root output directory for LLVM compiled for `target`
+    /// Root output directory of LLVM for `target`
     ///
     /// Note that if LLVM is configured externally then the directory returned
     /// will likely be empty.
     fn llvm_out(&self, target: TargetSelection) -> PathBuf {
-        self.out.join(&*target.triple).join("llvm")
+        if self.config.llvm_from_ci && self.config.build == target {
+            self.config.ci_llvm_root()
+        } else {
+            self.out.join(&*target.triple).join("llvm")
+        }
     }
 
     fn lld_out(&self, target: TargetSelection) -> PathBuf {