Backport bug fix to v1.1: don't Const-prop unitialized structs

Fixes bug introduced in `v1.1.0` causing some LLVM optimizations to run for hours. Fixes JuliaLang#31418
NHDaly · Apr 12, 2019 · fa692c1 · fa692c1
1 parent 80516ca
commit fa692c1
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/base/compiler/abstractinterpretation.jl b/base/compiler/abstractinterpretation.jl
@@ -910,7 +910,7 @@ function abstract_eval(@nospecialize(e), vtypes::VarTable, sv::InferenceState)
                     isconst = false
                 end
             end
-            if isconst
+            if isconst && fieldcount(t) == length(e.args) - 1
                 t = Const(ccall(:jl_new_structv, Any, (Any, Ptr{Cvoid}, UInt32), t, args, length(args)))
             end
         end