Imported Upstream version 5.18.0.205

Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927

external/llvm/test/CodeGen/X86/tailcallfp2.ll

@@ -0,0 +1,27 @@
+; RUN: llc < %s -mtriple=i686-- -tailcallopt | FileCheck %s
+
+declare i32 @putchar(i32)
+
+define fastcc i32 @checktail(i32 %x, i32* %f, i32 %g) nounwind {
+; CHECK-LABEL: checktail:
+        %tmp1 = icmp sgt i32 %x, 0
+        br i1 %tmp1, label %if-then, label %if-else
+
+if-then:
+        %fun_ptr = bitcast i32* %f to i32(i32, i32*, i32)* 
+        %arg1    = add i32 %x, -1
+        call i32 @putchar(i32 90)       
+; CHECK: jmpl *%e{{.*}}
+        %res = tail call fastcc i32 %fun_ptr( i32 %arg1, i32 * %f, i32 %g)
+        ret i32 %res
+
+if-else:
+        ret i32  %x
+}
+
+
+define i32 @main() nounwind { 
+ %f   = bitcast i32 (i32, i32*, i32)* @checktail to i32*
+ %res = tail call fastcc i32 @checktail( i32 10, i32* %f,i32 10)
+ ret i32 %res
+}