Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/CodeGen/AArch64/optimize-cond-branch.ll

@@ -1,48 +0,0 @@
-; RUN: llc -verify-machineinstrs -o - %s | FileCheck %s
-target triple = "arm64--"
-
-; AArch64InstrInfo::optimizeCondBranch() optimizes the
-; "x = and y, 256; cmp x, 0; br" from an "and; cbnz" to a tbnz instruction.
-; It forgot to clear the a flag resulting in a MachineVerifier complaint.
-;
-; Writing a stable/simple test is tricky since most tbz instructions are already
-; formed in SelectionDAG, optimizeCondBranch() only triggers if the and
-; instruction is in a different block than the conditional jump.
-;
-; CHECK-LABEL: func
-; CHECK-NOT: and
-; CHECK: tbz
-define void @func() {
-  %c0 = icmp sgt i64 0, 0
-  br i1 %c0, label %b1, label %b6
-
-b1:
-  br i1 undef, label %b3, label %b2
-
-b2:
-  %v0 = tail call i32 @extfunc()
-  br label %b5
-
-b3:
-  %v1 = load i32, i32* undef, align 4
-  %v2 = and i32 %v1, 256
-  br label %b5
-
-b5:
-  %v3 = phi i32 [ %v2, %b3 ], [ %v0, %b2 ]
-  %c1 = icmp eq i32 %v3, 0
-  br i1 %c1, label %b8, label %b7
-
-b6:
-  tail call i32 @extfunc()
-  ret void
-
-b7:
-  tail call i32 @extfunc()
-  ret void
-
-b8:
-  ret void
-}
-
-declare i32 @extfunc()