diff --git a/programming/build/llvm/actions.py b/programming/build/llvm/actions.py
index b5be0000ec..8c33bcf4f9 100644
--- a/programming/build/llvm/actions.py
+++ b/programming/build/llvm/actions.py
@@ -26,6 +26,8 @@ def setup():
     pisitools.ldflags.add("-fuse-ld=lld")
     pisitools.cflags.remove("-D_FORTIFY_SOURCE=2")
     pisitools.cxxflags.remove("-D_FORTIFY_SOURCE=2")
+    pisitools.cflags.add("-mllvm -polly")
+    pisitools.cxxflags.add("-mllvm -polly")
     shelltools.export("CC", "clang")
     shelltools.export("CXX", "clang++")
     shelltools.export("AR", "llvm-ar")
@@ -87,6 +89,7 @@ def setup():
                           -DLLVM_ENABLE_EH=ON \
                           -DLLVM_BUILD_LLVM_DYLIB=ON \
                           -DLLVM_LINK_LLVM_DYLIB=ON \
+                          -DLLVM_ENABLE_LTO=Thin \
                           -DLLDB_USE_SYSTEM_SIX=1 \
                           -DLLVM_INCLUDEDIR=/usr/include \
                           -DLLVM_ENABLE_ASSERTIONS=OFF \
diff --git a/programming/build/llvm/pspec.xml b/programming/build/llvm/pspec.xml
index 85e0a93b8f..ffffd419b2 100755
--- a/programming/build/llvm/pspec.xml
+++ b/programming/build/llvm/pspec.xml
@@ -11,7 +11,7 @@
         <License>NCSA</License>
         <Summary>The Low Level Virtual Machine</Summary>
         <Description>The LLVM Project is a collection of modular and reusable compiler and toolchain technologies. Despite its name, LLVM has little to do with traditional virtual machines, though it does provide helpful libraries that can be used to build them.</Description>
-       <Archive sha1sum="f38496e31e0dc80dc9e4a682a4020ec25af09887" type="tarxz">https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.1/llvm-project-12.0.1.src.tar.xz</Archive>
+       <Archive sha1sum="c8ebad168710ede8c281bf81c79ef7e85213e274" type="tarxz">https://github.com/llvm/llvm-project/releases/download/llvmorg-13.0.0/llvm-project-13.0.0.src.tar.xz</Archive>
        <BuildDependencies>
             <Dependency>ninja</Dependency>
             <Dependency>zlib-devel</Dependency>
@@ -36,9 +36,9 @@
             <AdditionalFile owner="root" permission="0644" target="../support-linking-ScopPassManager-against-LLVM-dylib.patch">support-linking-ScopPassManager-against-LLVM-dylib.patch</AdditionalFile>
         </AdditionalFiles>-->
         <Patches>
-            <Patch level="2">add-fno-semantic-interposition.patch</Patch>
+<!--            <Patch level="2">add-fno-semantic-interposition.patch</Patch>
             <Patch level="2">llvm-link-with-Bsymbolic-functions.patch</Patch>
-            <Patch level="2">no-strict-aliasing-DwarfCompileUnit.patch</Patch>
+            <Patch level="2">no-strict-aliasing-DwarfCompileUnit.patch</Patch>-->
         </Patches>
     </Source>
 
@@ -331,6 +331,13 @@
     </Package>
 
     <History>
+	<Update release="19">
+            <Date>2021-10-22</Date>
+            <Version>13.0.0</Version>
+            <Comment>Version bump</Comment>
+            <Name>İdris Kalp</Name>
+            <Email>idriskalp@gmail.com</Email>
+        </Update>
 	<Update release="18">
             <Date>2021-07-10</Date>
             <Version>12.0.1</Version>