Imported Upstream version 5.18.0.179

Former-commit-id: 67aa10e65b237e1c4537630979ee99ebe1374215

external/llvm/test/Transforms/IndVarSimplify/2003-09-23-NotAtTop.ll

@@ -0,0 +1,20 @@
+; RUN: opt -S -indvars < %s | FileCheck %s
+
+; The indvar simplification code should ensure that the first PHI in the block 
+; is the canonical one!
+
+define i32 @test() {
+; <label>:0
+        br label %Loop
+
+Loop:           ; preds = %Loop, %0
+; CHECK: Loop:
+; CHECK-NEXT: Canonical
+        %NonIndvar = phi i32 [ 200, %0 ], [ %NonIndvarNext, %Loop ]             ; <i32> [#uses=1]
+        %Canonical = phi i32 [ 0, %0 ], [ %CanonicalNext, %Loop ]               ; <i32> [#uses=2]
+        store i32 %Canonical, i32* null
+        %NonIndvarNext = sdiv i32 %NonIndvar, 2         ; <i32> [#uses=1]
+        %CanonicalNext = add i32 %Canonical, 1          ; <i32> [#uses=1]
+        br label %Loop
+}
+