[llvm] [MIR] Quote basic block names that are not plain identifiers (PR #214054)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,27 @@
+; Basic block names that are not plain identifiers must be quoted when printed,
+; otherwise the MIR that llc emits cannot be parsed back by llc. The names here
+; contain commas and spaces, which is the shape a Fortran front end emits.
+;
+; Check both that the name is quoted on the way out and that the result parses.
+
+; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -stop-before=greedy -o %t.mir %s
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arsenm wrote:

Use new triples 

https://github.com/llvm/llvm-project/pull/214054