Home | History | Annotate | Download | only in Inline 
      1 ; RUN: opt < %s -inline-threshold=0 -always-inline -S | FileCheck %s
      2 ;
      3 ; Ensure the threshold has no impact on these decisions.
      4 ; RUN: opt < %s -inline-threshold=20000000 -always-inline -S | FileCheck %s
      5 ; RUN: opt < %s -inline-threshold=-20000000 -always-inline -S | FileCheck %s
      6 
      7 define i32 @inner1() alwaysinline {
      8   ret i32 1
      9 }
     10 define i32 @outer1() {
     11 ; CHECK: @outer1
     12 ; CHECK-NOT: call
     13 ; CHECK: ret
     14 
     15    %r = call i32 @inner1()
     16    ret i32 %r
     17 }
     18 
     19 ; The always inliner can't DCE internal functions. PR2945
     20 ; CHECK: @pr2945
     21 define internal i32 @pr2945() nounwind {
     22   ret i32 0
     23 }
     24 
     25 define internal void @inner2(i32 %N) alwaysinline {
     26   %P = alloca i32, i32 %N
     27   ret void
     28 }
     29 define void @outer2(i32 %N) {
     30 ; The always inliner (unlike the normal one) should be willing to inline
     31 ; a function with a dynamic alloca into one without a dynamic alloca.
     32 ; rdar://6655932
     33 ;
     34 ; CHECK: @outer2
     35 ; CHECK-NOT: call void @inner2
     36 ; CHECK alloca i32, i32 %N
     37 ; CHECK-NOT: call void @inner2
     38 ; CHECK: ret void
     39 
     40   call void @inner2( i32 %N )
     41   ret void
     42 }
     43 
     44 declare i32 @a() returns_twice
     45 declare i32 @b() returns_twice
     46 
     47 define i32 @inner3() alwaysinline {
     48 entry:
     49   %call = call i32 @a() returns_twice
     50   %add = add nsw i32 1, %call
     51   ret i32 %add
     52 }
     53 define i32 @outer3() {
     54 entry:
     55 ; CHECK: @outer3
     56 ; CHECK-NOT: call i32 @a
     57 ; CHECK: ret
     58 
     59   %call = call i32 @inner3()
     60   %add = add nsw i32 1, %call
     61   ret i32 %add
     62 }
     63 
     64 define i32 @inner4() alwaysinline returns_twice {
     65 entry:
     66   %call = call i32 @b() returns_twice
     67   %add = add nsw i32 1, %call
     68   ret i32 %add
     69 }
     70 
     71 define i32 @outer4() {
     72 entry:
     73 ; CHECK: @outer4
     74 ; CHECK: call i32 @b()
     75 ; CHECK: ret
     76 
     77   %call = call i32 @inner4() returns_twice
     78   %add = add nsw i32 1, %call
     79   ret i32 %add
     80 }
     81 
     82 define i32 @inner5(i8* %addr) alwaysinline {
     83 entry:
     84   indirectbr i8* %addr, [ label %one, label %two ]
     85 
     86 one:
     87   ret i32 42
     88 
     89 two:
     90   ret i32 44
     91 }
     92 define i32 @outer5(i32 %x) {
     93 ; CHECK: @outer5
     94 ; CHECK: call i32 @inner5
     95 ; CHECK: ret
     96 
     97   %cmp = icmp slt i32 %x, 42
     98   %addr = select i1 %cmp, i8* blockaddress(@inner5, %one), i8* blockaddress(@inner5, %two)
     99   %call = call i32 @inner5(i8* %addr)
    100   ret i32 %call
    101 }
    102 
    103 define void @inner6(i32 %x) alwaysinline {
    104 entry:
    105   %icmp = icmp slt i32 %x, 0
    106   br i1 %icmp, label %return, label %bb
    107 
    108 bb:
    109   %sub = sub nsw i32 %x, 1
    110   call void @inner6(i32 %sub)
    111   ret void
    112 
    113 return:
    114   ret void
    115 }
    116 define void @outer6() {
    117 ; CHECK: @outer6
    118 ; CHECK: call void @inner6(i32 42)
    119 ; CHECK: ret
    120 
    121 entry:
    122   call void @inner6(i32 42)
    123   ret void
    124 }
    125 
    126