1 ; RUN: llc < %s -mtriple=armv6-apple-ios -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-ios -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 11 declare void @g(i32, i32, i32, i32) 12 13 define void @t1() { 14 ; CHECKELF-LABEL: t1: 15 ; CHECKELF: bl g(PLT) 16 call void @g( i32 1, i32 2, i32 3, i32 4 ) 17 ret void 18 } 19 20 define void @t2() { 21 ; CHECKV6-LABEL: t2: 22 ; CHECKV6: bx r0 23 ; CHECKT2D-LABEL: 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 32 define void @t3() { 33 ; CHECKV6-LABEL: t3: 34 ; CHECKV6: b _t2 35 ; CHECKELF-LABEL: t3: 36 ; CHECKELF: b t2(PLT) 37 ; CHECKT2D-LABEL: 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 45 define double @t4(double %a) nounwind readonly ssp { 46 entry: 47 ; CHECKV6-LABEL: t4: 48 ; CHECKV6: b _sin 49 ; CHECKELF-LABEL: 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 55 define float @t5(float %a) nounwind readonly ssp { 56 entry: 57 ; CHECKV6-LABEL: t5: 58 ; CHECKV6: b _sinf 59 ; CHECKELF-LABEL: 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 65 declare float @sinf(float) nounwind readonly 66 67 declare double @sin(double) nounwind readonly 68 69 define i32 @t6(i32 %a, i32 %b) nounwind readnone { 70 entry: 71 ; CHECKV6-LABEL: t6: 72 ; CHECKV6: b ___divsi3 73 ; CHECKELF-LABEL: 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 81 declare void @foo() nounwind 82 83 define void @t7() nounwind { 84 entry: 85 ; CHECKT2D-LABEL: 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 91 bb1.lr.ph: 92 tail call void @foo() nounwind 93 unreachable 94 95 bb: 96 tail call void @foo() nounwind 97 ret void 98 } 99 100 ; Make sure codegenprep is duplicating ret instructions to enable tail calls. 101 ; rdar://11140249 102 define i32 @t8(i32 %x) nounwind ssp { 103 entry: 104 ; CHECKT2D-LABEL: t8: 105 ; CHECKT2D-NOT: push 106 %and = and i32 %x, 1 107 %tobool = icmp eq i32 %and, 0 108 br i1 %tobool, label %if.end, label %if.then 109 110 if.then: ; preds = %entry 111 ; CHECKT2D: bne.w _a 112 %call = tail call i32 @a(i32 %x) nounwind 113 br label %return 114 115 if.end: ; preds = %entry 116 %and1 = and i32 %x, 2 117 %tobool2 = icmp eq i32 %and1, 0 118 br i1 %tobool2, label %if.end5, label %if.then3 119 120 if.then3: ; preds = %if.end 121 ; CHECKT2D: bne.w _b 122 %call4 = tail call i32 @b(i32 %x) nounwind 123 br label %return 124 125 if.end5: ; preds = %if.end 126 ; CHECKT2D: b.w _c 127 %call6 = tail call i32 @c(i32 %x) nounwind 128 br label %return 129 130 return: ; preds = %if.end5, %if.then3, %if.then 131 %retval.0 = phi i32 [ %call, %if.then ], [ %call4, %if.then3 ], [ %call6, %if.end5 ] 132 ret i32 %retval.0 133 } 134 135 declare i32 @a(i32) 136 137 declare i32 @b(i32) 138 139 declare i32 @c(i32) 140 141 ; PR12419 142 ; rdar://11195178 143 ; Use the correct input chain for the tailcall node or else the call to 144 ; _ZN9MutexLockD1Ev would be lost. 145 %class.MutexLock = type { i8 } 146 147 @x = external global i32, align 4 148 149 define i32 @t9() nounwind { 150 ; CHECKT2D-LABEL: t9: 151 ; CHECKT2D: blx __ZN9MutexLockC1Ev 152 ; CHECKT2D: blx __ZN9MutexLockD1Ev 153 ; CHECKT2D: b.w ___divsi3 154 %lock = alloca %class.MutexLock, align 1 155 %1 = call %class.MutexLock* @_ZN9MutexLockC1Ev(%class.MutexLock* %lock) 156 %2 = load i32* @x, align 4 157 %3 = sdiv i32 1000, %2 158 %4 = call %class.MutexLock* @_ZN9MutexLockD1Ev(%class.MutexLock* %lock) 159 ret i32 %3 160 } 161 162 declare %class.MutexLock* @_ZN9MutexLockC1Ev(%class.MutexLock*) unnamed_addr nounwind align 2 163 164 declare %class.MutexLock* @_ZN9MutexLockD1Ev(%class.MutexLock*) unnamed_addr nounwind align 2 165 166 ; rdar://13827621 167 ; Correctly preserve the input chain for the tailcall node in the bitcast case, 168 ; otherwise the call to floorf is lost. 169 define float @libcall_tc_test2(float* nocapture %a, float %b) { 170 ; CHECKT2D-LABEL: libcall_tc_test2: 171 ; CHECKT2D: blx _floorf 172 ; CHECKT2D: b.w _truncf 173 %1 = load float* %a, align 4 174 %call = tail call float @floorf(float %1) 175 store float %call, float* %a, align 4 176 %call1 = tail call float @truncf(float %b) 177 ret float %call1 178 } 179 180 declare float @floorf(float) readnone 181 declare float @truncf(float) readnone 182
