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 7define i32 @inner1() alwaysinline { 8 ret i32 1 9} 10define i32 @outer1() { 11; CHECK-LABEL: @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-LABEL: @pr2945( 21define internal i32 @pr2945() nounwind { 22 ret i32 0 23} 24 25define internal void @inner2(i32 %N) alwaysinline { 26 %P = alloca i32, i32 %N 27 ret void 28} 29define 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-LABEL: @outer2( 35; CHECK-NOT: call void @inner2 36; CHECK-NOT: call void @inner2 37; CHECK: ret void 38 39 call void @inner2( i32 %N ) 40 ret void 41} 42 43declare i32 @a() returns_twice 44declare i32 @b() returns_twice 45 46define i32 @inner3() alwaysinline { 47entry: 48 %call = call i32 @a() returns_twice 49 %add = add nsw i32 1, %call 50 ret i32 %add 51} 52define i32 @outer3() { 53entry: 54; CHECK-LABEL: @outer3( 55; CHECK-NOT: call i32 @a 56; CHECK: ret 57 58 %call = call i32 @inner3() 59 %add = add nsw i32 1, %call 60 ret i32 %add 61} 62 63define i32 @inner4() alwaysinline returns_twice { 64entry: 65 %call = call i32 @b() returns_twice 66 %add = add nsw i32 1, %call 67 ret i32 %add 68} 69 70define i32 @outer4() { 71entry: 72; CHECK-LABEL: @outer4( 73; CHECK: call i32 @b() 74; CHECK: ret 75 76 %call = call i32 @inner4() returns_twice 77 %add = add nsw i32 1, %call 78 ret i32 %add 79} 80 81define i32 @inner5(i8* %addr) alwaysinline { 82entry: 83 indirectbr i8* %addr, [ label %one, label %two ] 84 85one: 86 ret i32 42 87 88two: 89 ret i32 44 90} 91define i32 @outer5(i32 %x) { 92; CHECK-LABEL: @outer5( 93; CHECK: call i32 @inner5 94; CHECK: ret 95 96 %cmp = icmp slt i32 %x, 42 97 %addr = select i1 %cmp, i8* blockaddress(@inner5, %one), i8* blockaddress(@inner5, %two) 98 %call = call i32 @inner5(i8* %addr) 99 ret i32 %call 100} 101 102define void @inner6(i32 %x) alwaysinline { 103entry: 104 %icmp = icmp slt i32 %x, 0 105 br i1 %icmp, label %return, label %bb 106 107bb: 108 %sub = sub nsw i32 %x, 1 109 call void @inner6(i32 %sub) 110 ret void 111 112return: 113 ret void 114} 115define void @outer6() { 116; CHECK-LABEL: @outer6( 117; CHECK: call void @inner6(i32 42) 118; CHECK: ret 119 120entry: 121 call void @inner6(i32 42) 122 ret void 123} 124 125define i32 @inner7() { 126 ret i32 1 127} 128define i32 @outer7() { 129; CHECK-LABEL: @outer7( 130; CHECK-NOT: call 131; CHECK: ret 132 133 %r = call i32 @inner7() alwaysinline 134 ret i32 %r 135} 136