Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/CodeGen/ARM/peephole-bitcast.ll

@@ -0,0 +1,28 @@
+; RUN: llc < %s -mtriple=arm-- -mcpu=cortex-a8 | FileCheck %s
+; XFAIL: *
+; PR11364
+
+; vmov s0, r0 + vmov r0, s0 should have been optimized away.
+; rdar://9104514
+
+; Peephole leaves a dead vmovsr instruction behind, and depends on linear scan
+; to remove it.
+
+define void @t(float %x) nounwind ssp {
+entry:
+; CHECK-LABEL:     t:
+; CHECK-NOT: vmov
+; CHECK:     bl
+  %0 = bitcast float %x to i32
+  %cmp = icmp ult i32 %0, 2139095039
+  br i1 %cmp, label %if.then, label %if.end
+
+if.then:                                          ; preds = %entry
+  tail call void @doSomething(float %x) nounwind
+  br label %if.end
+
+if.end:                                           ; preds = %if.then, %entry
+  ret void
+}
+
+declare void @doSomething(float)