Imported Upstream version 5.18.0.225

Former-commit-id: 10196d987d5fc5564b9d3b33b1fdf13190f4d0b5

external/llvm/test/Transforms/GlobalOpt/atomic.ll

@@ -0,0 +1,25 @@
+; RUN: opt -globalopt < %s -S -o - | FileCheck %s
+
+@GV1 = internal global i64 1
+@GV2 = internal global i32 0
+
+; CHECK: @GV1 = internal unnamed_addr constant i64 1
+; CHECK: @GV2 = internal unnamed_addr global i32 0
+
+define void @test1() {
+entry:
+  %0 = load atomic i8, i8* bitcast (i64* @GV1 to i8*) acquire, align 8
+  ret void
+}
+
+; PR17163
+define void @test2a() {
+entry:
+  store atomic i32 10, i32* @GV2 seq_cst, align 4
+  ret void
+}
+define i32 @test2b() {
+entry:
+  %atomic-load = load atomic i32, i32* @GV2 seq_cst, align 4
+  ret i32 %atomic-load
+}