Master just got a fix for building against llvm 12 and later, so the patch for the fixedvectortype is removed.

.SRCINFO

@@ -1,6 +1,6 @@
 pkgbase = mesa-git
 	pkgdesc = an open-source implementation of the OpenGL specification, git version
-	pkgver = 21.1.0_devel.137907.1aeebac4e6b
+	pkgver = 21.2.0_devel.138195.b8403192edd
 	pkgrel = 1
 	url = https://www.mesa3d.org
 	arch = x86_64
@@ -60,13 +60,10 @@ pkgbase = mesa-git
 	conflicts = vulkan-swrast
 	source = mesa::git+https://gitlab.freedesktop.org/mesa/mesa.git
 	source = LICENSE
-	source = 0001-clover-llvm13-use-FixedVectorType.patch
 	md5sums = SKIP
 	md5sums = 5c65a0fe315dd347e09b1f2826a1df5a
-	md5sums = 5f0620ce35da2d1f80dc1b3c03eafc32
 	sha512sums = SKIP
 	sha512sums = 25da77914dded10c1f432ebcbf29941124138824ceecaf1367b3deedafaecabc082d463abcfa3d15abff59f177491472b505bcb5ba0c4a51bb6b93b4721a23c2
-	sha512sums = c3a567df69a263c6b87d9c7887464ed03b5a0bf008caf180c45cf50dca3f4710e0eda3e453a7a69b89720e333c33b9aa7da1b7f9c79d72bb76d847b567558d19
 
 pkgname = mesa-git
 

0001-clover-llvm13-use-FixedVectorType.patch

@@ -1,16 +0,0 @@
-diff --unified --recursive --text mesa.orig/src/gallium/frontends/clover/llvm/metadata.hpp mesa.new/src/gallium/frontends/clover/llvm/metadata.hpp
---- mesa.orig/src/gallium/frontends/clover/llvm/metadata.hpp	2021-02-14 13:15:16.994404651 +0100
-+++ mesa.new/src/gallium/frontends/clover/llvm/metadata.hpp	2021-02-14 13:19:11.096855317 +0100
-@@ -129,7 +129,11 @@
-                      break;
-                }
-                if (type->isVectorTy())
--                  data += std::to_string(((::llvm::VectorType*)type)->getNumElements());
-+#if LLVM_VERSION_MAJOR >= 13
-+                  data += std::to_string(((::llvm::FixedVectorType*)type)->getNumElements());
-+#else
-+                  data += std::to_string(((::llvm::VectorType*)type)->getNumElements());
-+#endif
- 
-             } else {
-                ::llvm::raw_string_ostream os { data };

PKGBUILD

@@ -12,7 +12,7 @@
 
 pkgname=mesa-git
 pkgdesc="an open-source implementation of the OpenGL specification, git version"
-pkgver=21.1.0_devel.137968.437ed05708e
+pkgver=21.2.0_devel.138224.f601fd635bb
 pkgrel=1
 arch=('x86_64')
 makedepends=('git' 'python-mako' 'xorgproto'
@@ -26,14 +26,11 @@ conflicts=('mesa' 'opencl-mesa' 'vulkan-intel' 'vulkan-radeon' 'vulkan-mesa-laye
 url="https://www.mesa3d.org"
 license=('custom')
 source=('mesa::git+https://gitlab.freedesktop.org/mesa/mesa.git'
-        'LICENSE'
-        '0001-clover-llvm13-use-FixedVectorType.patch')
+        'LICENSE')
 md5sums=('SKIP'
-         '5c65a0fe315dd347e09b1f2826a1df5a'
-         '5f0620ce35da2d1f80dc1b3c03eafc32')
+         '5c65a0fe315dd347e09b1f2826a1df5a')
 sha512sums=('SKIP'
-            '25da77914dded10c1f432ebcbf29941124138824ceecaf1367b3deedafaecabc082d463abcfa3d15abff59f177491472b505bcb5ba0c4a51bb6b93b4721a23c2'
-            'c3a567df69a263c6b87d9c7887464ed03b5a0bf008caf180c45cf50dca3f4710e0eda3e453a7a69b89720e333c33b9aa7da1b7f9c79d72bb76d847b567558d19')
+            '25da77914dded10c1f432ebcbf29941124138824ceecaf1367b3deedafaecabc082d463abcfa3d15abff59f177491472b505bcb5ba0c4a51bb6b93b4721a23c2')
 
 # NINJAFLAGS is an env var used to pass commandline options to ninja
 # NOTE: It's your responbility to validate the value of $NINJAFLAGS. If unsure, don't set it.
@@ -98,8 +95,6 @@ prepare() {
     if [  -d _build ]; then
         rm -rf _build
     fi
-    cd mesa
-    patch --forward --strip=1 --input="${srcdir}/0001-clover-llvm13-use-FixedVectorType.patch"
 }
 
 build () {