LLVM 9

[int-index]

There are a few test cases that fail in optllvm way. Steps to reproduce:

hadrian/build --flavour=Quick --freeze1 test --only="T11649 T5681 T7571 T8131b"

The issue is that their output contains:

You are using an unsupported version of LLVM!
Currently only 9 is supported. System LLVM version: 7.1.0
We will try though...

[alpmestan]

Our pinned nixpkgs doesn't seem to have llvm_9. We can update to, say, a recent commit from the 20.03 channels, e.g:

diff --git a/default.nix b/default.nix
index 2146f16..dcbbddc 100644
--- a/default.nix
+++ b/default.nix
@@ -31,7 +31,7 @@ in
 with nixpkgs;
 
 let
-    llvmForGhc = llvm_7;
+    llvmForGhc = nixpkgs.llvm_9;
 
     stdenv =
       if useClang
diff --git a/nix/pins/nixpkgs.src-json b/nix/pins/nixpkgs.src-json
index e07f7e7..c7a2962 100644
--- a/nix/pins/nixpkgs.src-json
+++ b/nix/pins/nixpkgs.src-json
@@ -1,6 +1,6 @@
 {
   "url": "https://github.com/NixOS/nixpkgs",
-  "rev": "6d445f8398d2d585d20d9acacf00fd9d15081b3b",
-  "sha256": "1ajd0zr31iny3g9hp0pc1y2pxcm3nakdv6260lnvyn0k4vygync2",
+  "rev": "ab3adfe1c769c22b6629e59ea0ef88ec8ee4563f",
+  "sha256": "1m4wvrrcvif198ssqbdw897c8h84l0cy7q75lyfzdsz9khm1y2n1",
   "fetchSubmodules": false
 }

Does it fix the problem? Warning: lots of fetching and some building ahead.

[int-index]

Does it fix the problem?

Yes, thanks!

[sgraf812]

We've recently had the same with LLVM 10 and the changes landed on master. Can we close this?