[llvm] Allow this test to pass when the source is on a read-only filesystem (PR #134179)

[Matt Arsenault via llvm-commits]

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@@ -1,7 +1,7 @@
-; RUN: not --crash llc -mtriple=amdgcn -mcpu=gfx810 %s 2>&1 | FileCheck --ignore-case %s
-; RUN: not --crash llc -global-isel -mtriple=amdgcn -mcpu=gfx810 %s 2>&1 | FileCheck --ignore-case %s
-; RUN: not --crash llc -mtriple=amdgcn -mcpu=gfx1100 %s 2>&1 | FileCheck --ignore-case %s
-; RUN: not --crash llc -global-isel -mtriple=amdgcn -mcpu=gfx1100 %s 2>&1 | FileCheck --ignore-case %s
+; RUN: not --crash llc -o - -mtriple=amdgcn -mcpu=gfx810 %s 2>&1 | FileCheck --ignore-case %s
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arsenm wrote:

Should use -filetype=null for this 

https://github.com/llvm/llvm-project/pull/134179