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; RUN: llc < %s -mtriple=i686-linux-gnu -mcpu=pentium | FileCheck %s
; Tail call should not make register allocation fail (x86-32)
%struct.anon = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr }
%struct.BIG_PARM = type { i32 }
@vtable = internal unnamed_addr constant [1 x %struct.anon] [%struct.anon { ptr inttoptr (i32 -559038737 to ptr), ptr null, ptr null, ptr null, ptr null, ptr null, ptr null }], align 4
; Function Attrs: nounwind uwtable
define dso_local i32 @something(ptr inreg noundef %a, ptr inreg noundef %b) local_unnamed_addr #0 {
entry:
; CHECK: movl (%eax), %ecx
; CHECK-NEXT: leal (%ecx,%ecx,8), %esi
; CHECK-NEXT: leal (%esi,%esi,2), %esi
; CHECK-NEXT: movl vtable(%ecx,%esi), %ecx
; CHECK-NEXT: popl %esi
; CHECK: jmpl *%ecx
%0 = load i32, ptr %a, align 4
%foo = getelementptr [1 x %struct.anon], ptr @vtable, i32 0, i32 %0, i32 0
%1 = load ptr, ptr %foo, align 4
%call = tail call i32 %1(ptr inreg noundef %a, ptr inreg noundef %b) #1
ret i32 %call
}
!llvm.module.flags = !{!0}
!0 = !{i32 1, !"NumRegisterParameters", i32 3}
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