Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Transforms/IndVarSimplify/lcssa-preservation.ll

@@ -1,50 +0,0 @@
-; RUN: opt < %s -indvars -replexitval=always -S | FileCheck %s
-; Make sure IndVars preserves LCSSA form, especially across loop nests. 
-
-target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
-
-define void @PR18642(i32 %x) {
-; CHECK-LABEL: @PR18642(
-entry:
-  br label %outer.header
-; CHECK:   br label %outer.header
-
-outer.header:
-; CHECK: outer.header:
-  %outer.iv = phi i32 [ 0, %entry ], [ %x, %outer.latch ]
-  br label %inner.header
-; CHECK:   %[[SCEV_EXPANDED:.*]] = add i32
-; CHECK:   br label %inner.header
-
-inner.header:
-; CHECK: inner.header:
-  %inner.iv = phi i32 [ undef, %outer.header ], [ %inc, %inner.latch ]
-  %cmp1 = icmp slt i32 %inner.iv, %outer.iv
-  br i1 %cmp1, label %inner.latch, label %outer.latch
-; CHECK:   br i1 {{.*}}, label %inner.latch, label %outer.latch
-
-inner.latch:
-; CHECK: inner.latch:
-  %inc = add nsw i32 %inner.iv, 1
-  %cmp2 = icmp slt i32 %inner.iv, %outer.iv
-  br i1 %cmp2, label %inner.header, label %exit
-; CHECK:   br i1 {{.*}}, label %inner.header, label %[[EXIT_FROM_INNER:.*]]
-
-outer.latch:
-; CHECK: outer.latch:
-  br i1 undef, label %outer.header, label %exit
-; CHECK:   br i1 {{.*}}, label %outer.header, label %[[EXIT_FROM_OUTER:.*]]
-
-; CHECK: [[EXIT_FROM_INNER]]:
-; CHECK-NEXT: %[[LCSSA:.*]] = phi i32 [ %[[SCEV_EXPANDED]], %inner.latch ]
-; CHECK-NEXT: br label %exit
-
-; CHECK: [[EXIT_FROM_OUTER]]:
-; CHECK-NEXT: br label %exit
-
-exit:
-; CHECK: exit:
-  %exit.phi = phi i32 [ %inc, %inner.latch ], [ undef, %outer.latch ]
-; CHECK-NEXT: phi i32 [ %[[LCSSA]], %[[EXIT_FROM_INNER]] ], [ undef, %[[EXIT_FROM_OUTER]] ]
-  ret void
-}