build/windows: consolidate cache into single operation

Signed-off-by: deadprogram <[email protected]>

Author: deadprogram

.github/workflows/windows.yml

@@ -37,37 +37,18 @@ jobs:
         with:
           go-version: '1.20'
           cache: true
-      - name: Restore cached LLVM source
+      - name: Restore cached LLVM build
         uses: actions/cache/restore@v3
-        id: cache-llvm-source
-        with:
-          key: llvm-source-15-windows-v2-${{ hashFiles('llvm-project/llvm/include') }}
-          path: |
-            llvm-project/clang/lib/Headers
-            llvm-project/clang/include
-            llvm-project/compiler-rt
-            llvm-project/lld/include
-            llvm-project/llvm/include
-      - name: Download LLVM source
-        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
-        run: make llvm-source
-      - name: Save cached LLVM source
-        uses: actions/cache/save@v3
-        if: always()
+        id: cache-llvm-build
         with:
-          key: llvm-source-15-windows-v2-${{ hashFiles('llvm-project/llvm/include') }}
+          key: llvm-build-15-windows-v3-${{ hashFiles('llvm-project/llvm/include') }}
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
             llvm-project/compiler-rt
             llvm-project/lld/include
             llvm-project/llvm/include
-      - name: Restore cached LLVM build
-        uses: actions/cache/restore@v3
-        id: cache-llvm-build
-        with:
-          key: llvm-build-15-windows-v3-${{ hashFiles('llvm-build') }}
-          path: llvm-build
+            llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
         shell: bash
@@ -83,8 +64,14 @@ jobs:
         uses: actions/cache/save@v3
         if: always()
         with:
-          key: llvm-build-15-windows-v3-${{ hashFiles('llvm-build') }}
-          path: llvm-build
+          key: llvm-build-15-windows-v3-${{ hashFiles('llvm-project/llvm/include') }}
+          path: |
+            llvm-project/clang/lib/Headers
+            llvm-project/clang/include
+            llvm-project/compiler-rt
+            llvm-project/lld/include
+            llvm-project/llvm/include
+            llvm-build
       - name: Cache wasi-libc sysroot
         uses: actions/cache@v3
         id: cache-wasi-libc