Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/CodeGen/AVR/select-must-add-unconditional-jump.ll

@@ -1,58 +0,0 @@
-; RUN: llc -march=avr -print-after=expand-isel-pseudos -cgp-freq-ratio-to-skip-merge=10 < %s 2>&1 | FileCheck %s
-
-; Because `switch` seems to trigger Machine Basic Blocks to be ordered
-; in a different order than they were constructed, this exposes an
-; error in the `expand-isel-pseudos` pass. Specifically, it thought we
-; could always fallthrough to a newly-constructed MBB. However,
-; there's no guarantee that either of the constructed MBBs need to
-; occur immediately after the currently-focused one!
-;
-; This issue manifests in a CFG that looks something like this:
-;
-; %bb.2: derived from LLVM BB %finish
-;     Predecessors according to CFG: %bb.0 %bb.1
-;         %0 = PHI %3, <%bb.0>, %5, <%bb.1>
-;         %7 = LDIRdK 2
-;         %8 = LDIRdK 1
-;         CPRdRr %2, %0, implicit-def %SREG
-;         BREQk <%bb.6>, implicit %SREG
-;     Successors according to CFG: %bb.5(?%) %bb.6(?%)
-;
-; The code assumes it the fallthrough block after this is %bb.5, but
-; it's actually %bb.3! To be proper, there should be an unconditional
-; jump tying this block to %bb.5.
-
-define i8 @select_must_add_unconditional_jump(i8 %arg0, i8 %arg1) unnamed_addr {
-entry-block:
-  switch i8 %arg0, label %dead [
-    i8 0, label %zero
-    i8 1, label %one
-  ]
-
-zero:
-  br label %finish
-
-one:
-  br label %finish
-
-finish:
-  %predicate = phi i8 [ 50, %zero ], [ 100, %one ]
-  %is_eq = icmp eq i8 %arg1, %predicate
-  %result = select i1 %is_eq, i8 1, i8 2
-  ret i8 %result
-
-dead:
-  ret i8 0
-}
-
-; This check may be a bit brittle, but the important thing is that the
-; basic block containing `select` needs to contain explicit jumps to
-; both successors.
-
-; CHECK: %bb.2: derived from LLVM BB %finish
-; CHECK: BREQk [[BRANCHED:%bb.[0-9]+]]
-; CHECK: RJMPk [[DIRECT:%bb.[0-9]+]]
-; CHECK: Successors according to CFG
-; CHECK-SAME-DAG: {{.*}}[[BRANCHED]]
-; CHECK-SAME-DAG: {{.*}}[[DIRECT]]
-; CHECK: %bb.3: derived from LLVM BB