test/CodeGen/X86/call-push.ll

; RUN: llc < %s -mtriple=i386-apple-darwin -frame-pointer=all -no-x86-call-frame-opt | FileCheck %s

        %struct.decode_t = type { i8, i8, i8, i8, i16, i8, i8, ptr }
        %struct.range_t = type { float, float, i32, i32, i32, [0 x i8] }

define i32 @decode_byte(ptr %decode) nounwind {
; CHECK-LABEL: decode_byte:
; CHECK: pushl
; CHECK: popl
; CHECK: jmp
; CHECK: popl
entry:
        %tmp2 = getelementptr %struct.decode_t, ptr %decode, i32 0, i32 4           ; <ptr> [#uses=1]
        %tmp4 = load i32, ptr %tmp2                ; <i32> [#uses=1]
        %tmp514 = lshr i32 %tmp4, 24            ; <i32> [#uses=1]
        %tmp56 = trunc i32 %tmp514 to i8                ; <i8> [#uses=1]
        %tmp7 = icmp eq i8 %tmp56, 0            ; <i1> [#uses=1]
        br i1 %tmp7, label %UnifiedReturnBlock, label %cond_true

cond_true:              ; preds = %entry
        %tmp10 = tail call i32 @f( ptr %decode )          ; <i32> [#uses=1]
        ret i32 %tmp10

UnifiedReturnBlock:             ; preds = %entry
        ret i32 0
}

declare i32 @f(ptr)


; There should be no store for the undef operand.

; CHECK: _test2:
; CHECK-NOT: 8(%esp)
; CHECK: 4(%esp)
; CHECK-NOT: 8(%esp)
; CHECK: calll 
declare i32 @foo(i32, i32, i32)

define void @test2() nounwind {
entry:
  %call = call i32 @foo(i32 8, i32 6, i32 undef)
  ret void
}