1; RUN: llc < %s -mtriple=armv6-apple-darwin -mattr=+vfp2 -arm-tail-calls | FileCheck %s -check-prefix=CHECKV6 2; RUN: llc < %s -mtriple=armv6-linux-gnueabi -relocation-model=pic -mattr=+vfp2 -arm-tail-calls | FileCheck %s -check-prefix=CHECKELF 3; RUN: llc < %s -mtriple=thumbv7-apple-darwin -arm-tail-calls | FileCheck %s -check-prefix=CHECKT2D 4; RUN: llc < %s -mtriple=thumbv7-apple-ios5.0 | FileCheck %s -check-prefix=CHECKT2D 5 6; Enable tailcall optimization for iOS 5.0 7; rdar://9120031 8 9@t = weak global i32 ()* null ; <i32 ()**> [#uses=1] 10 11declare void @g(i32, i32, i32, i32) 12 13define void @t1() { 14; CHECKELF: t1: 15; CHECKELF: bl g(PLT) 16 call void @g( i32 1, i32 2, i32 3, i32 4 ) 17 ret void 18} 19 20define void @t2() { 21; CHECKV6: t2: 22; CHECKV6: bx r0 23; CHECKT2D: t2: 24; CHECKT2D: ldr 25; CHECKT2D-NEXT: ldr 26; CHECKT2D-NEXT: bx r0 27 %tmp = load i32 ()** @t ; <i32 ()*> [#uses=1] 28 %tmp.upgrd.2 = tail call i32 %tmp( ) ; <i32> [#uses=0] 29 ret void 30} 31 32define void @t3() { 33; CHECKV6: t3: 34; CHECKV6: b _t2 35; CHECKELF: t3: 36; CHECKELF: b t2(PLT) 37; CHECKT2D: t3: 38; CHECKT2D: b.w _t2 39 40 tail call void @t2( ) ; <i32> [#uses=0] 41 ret void 42} 43 44; Sibcall optimization of expanded libcalls. rdar://8707777 45define double @t4(double %a) nounwind readonly ssp { 46entry: 47; CHECKV6: t4: 48; CHECKV6: b _sin 49; CHECKELF: t4: 50; CHECKELF: b sin(PLT) 51 %0 = tail call double @sin(double %a) nounwind readonly ; <double> [#uses=1] 52 ret double %0 53} 54 55define float @t5(float %a) nounwind readonly ssp { 56entry: 57; CHECKV6: t5: 58; CHECKV6: b _sinf 59; CHECKELF: t5: 60; CHECKELF: b sinf(PLT) 61 %0 = tail call float @sinf(float %a) nounwind readonly ; <float> [#uses=1] 62 ret float %0 63} 64 65declare float @sinf(float) nounwind readonly 66 67declare double @sin(double) nounwind readonly 68 69define i32 @t6(i32 %a, i32 %b) nounwind readnone { 70entry: 71; CHECKV6: t6: 72; CHECKV6: b ___divsi3 73; CHECKELF: t6: 74; CHECKELF: b __aeabi_idiv(PLT) 75 %0 = sdiv i32 %a, %b 76 ret i32 %0 77} 78 79; Make sure the tail call instruction isn't deleted 80; rdar://8309338 81declare void @foo() nounwind 82 83define void @t7() nounwind { 84entry: 85; CHECKT2D: t7: 86; CHECKT2D: blxeq _foo 87; CHECKT2D-NEXT: pop.w 88; CHECKT2D-NEXT: b.w _foo 89 br i1 undef, label %bb, label %bb1.lr.ph 90 91bb1.lr.ph: 92 tail call void @foo() nounwind 93 unreachable 94 95bb: 96 tail call void @foo() nounwind 97 ret void 98} 99