[InlineCost][precommit]: Add test file

Author: hassnaaHamdi

llvm/test/Transforms/Inline/inline-recursive-fn2.ll

@@ -0,0 +1,39 @@
+; RUN: opt -passes='cgscc(inline),instcombine,cgscc(inline)' -S -debug-only=inline -disable-output < %s 2>&1 | FileCheck %s
+
+; CHECK:  Inlining calls in: test
+; CHECK:      Function size: 2
+; CHECK:      Inlining (cost=-35, threshold=337), Call:   %call = tail call float @inline_rec_true_successor(float %x, float %scale)
+; CHECK:      Size after inlining: 10
+
+; CHECK:  Inlining calls in: inline_rec_true_successor
+; CHECK:      Function size: 10
+; CHECK:      Inlining (cost=-35, threshold=337), Call:   %call = tail call float @inline_rec_true_successor(float %fneg, float %scale)
+; CHECK:      Size after inlining: 17
+; CHECK:      NOT Inlining (cost=never): noinline function attribute, Call:   %call_test = tail call float @test(float %fneg, float %common.ret18.op.i)
+
+
+define float @test(float %x, float %scale) noinline {
+entry:
+  %call = tail call float @inline_rec_true_successor(float %x, float %scale)
+  ret float %call
+}
+
+define float @inline_rec_true_successor(float %x, float %scale)  {
+entry:
+  %cmp = fcmp olt float %x, 0.000000e+00
+  br i1 %cmp, label %if.then, label %if.end
+
+common.ret18:                                     ; preds = %if.then, %if.end
+  %common.ret18.op = phi float [ %call_test, %if.then ], [ %mul, %if.end ]
+  ret float %common.ret18.op
+
+if.then:                                          ; preds = %entry
+  %fneg = fneg float %x
+  %call = tail call float @inline_rec_true_successor(float %fneg, float %scale)
+  %call_test = tail call float @test(float %fneg, float %call)
+  br label %common.ret18
+
+if.end:                                           ; preds = %entry
+  %mul = fmul float %x, %scale
+  br label %common.ret18
+}