Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/test/CodeGen/Hexagon/ifcvt-common-kill.mir

@@ -0,0 +1,34 @@
+# RUN: llc -march=hexagon -run-pass if-converter -o - %s -verify-machineinstrs | FileCheck %s
+
+# CHECK: %r26 = A2_tfr %r1
+# CHECK: S2_pstorerhf_io undef %p0, undef %r0, 0, killed %r1
+
+---
+name:            foo
+tracksRegLiveness: true
+body: |
+  bb.0:
+    successors: %bb.1, %bb.2
+    liveins: %r0, %r1
+      J2_jumpf undef %p0, %bb.2, implicit-def %pc
+
+  bb.1:
+    successors: %bb.3
+    liveins: %r1
+      ; This <kill> flag should be cleared. It didn't use to be, because
+      ; this instruction is treated as a duplicate of the corresponding
+      ; instruction from the "false" block bb.2. Clearing of the <kill>
+      ; flags was limited to the non-common part of the "true" block.
+      %r26 = A2_tfr killed %r1
+      J2_jump %bb.3, implicit-def %pc
+
+  bb.2:
+    successors: %bb.3
+    liveins: %r1
+      %r26 = A2_tfr %r1
+      S2_storerh_io undef %r0, 0, killed %r1
+      J2_jump %bb.3, implicit-def %pc
+
+  bb.3:
+    liveins: %r26
+...