[llvm] [X86] Fold cross-block constants into address mode displacement (PR #203883)

[Simon Pilgrim via llvm-commits]

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@@ -18,3 +18,60 @@ define fastcc void @foo() nounwind {
 	store i8 1, ptr %t, align 1
 	ret void
 }
+
+; A compile-time constant used as a base address in a loop was not being
+; folded into the x86 displacement field, causing a redundant MOV
+;LLVM Issue- 198228
+
+ at g_align = dso_local global i64 16, align 8
+ at g_idx = dso_local global i64 5, align 8
+ at g_out = dso_local global i64 0, align 8
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RKSimon wrote:

drop superfluous dso_local

https://github.com/llvm/llvm-project/pull/203883