1 ; RUN: llc < %s -mtriple=thumbv7-apple-ios -mcpu=cortex-a8 | FileCheck %s 2 ; rdar://13782395 3 4 define i32 @t1(i32 %a, i32 %b, i8** %retaddr) { 5 ; CHECK-LABEL: t1: 6 ; CHECK: Block address taken 7 ; CHECK-NOT: Address of block that was removed by CodeGen 8 store i8* blockaddress(@t1, %cond_true), i8** %retaddr 9 %tmp2 = icmp eq i32 %a, 0 10 br i1 %tmp2, label %cond_false, label %cond_true 11 12 cond_true: 13 %tmp5 = add i32 %b, 1 14 ret i32 %tmp5 15 16 cond_false: 17 %tmp7 = add i32 %b, -1 18 ret i32 %tmp7 19 } 20 21 define i32 @t2(i32 %a, i32 %b, i32 %c, i32 %d, i8** %retaddr) { 22 ; CHECK-LABEL: t2: 23 ; CHECK: Block address taken 24 ; CHECK: %cond_true 25 ; CHECK: add 26 ; CHECK: bx lr 27 store i8* blockaddress(@t2, %cond_true), i8** %retaddr 28 %tmp2 = icmp sgt i32 %c, 10 29 %tmp5 = icmp slt i32 %d, 4 30 %tmp8 = and i1 %tmp5, %tmp2 31 %tmp13 = add i32 %b, %a 32 br i1 %tmp8, label %cond_true, label %UnifiedReturnBlock 33 34 cond_true: 35 %tmp15 = add i32 %tmp13, %c 36 %tmp1821 = sub i32 %tmp15, %d 37 ret i32 %tmp1821 38 39 UnifiedReturnBlock: 40 ret i32 %tmp13 41 } 42 43 define hidden fastcc void @t3(i8** %retaddr) { 44 ; CHECK-LABEL: t3: 45 ; CHECK: Block address taken 46 ; CHECK-NOT: Address of block that was removed by CodeGen 47 bb: 48 store i8* blockaddress(@t3, %KBBlockZero_return_1), i8** %retaddr 49 br i1 undef, label %bb77, label %bb7.i 50 51 bb7.i: ; preds = %bb35 52 br label %bb2.i 53 54 KBBlockZero_return_1: ; preds = %KBBlockZero.exit 55 unreachable 56 57 KBBlockZero_return_0: ; preds = %KBBlockZero.exit 58 unreachable 59 60 bb77: ; preds = %bb26, %bb12, %bb 61 ret void 62 63 bb2.i: ; preds = %bb6.i350, %bb7.i 64 br i1 undef, label %bb6.i350, label %KBBlockZero.exit 65 66 bb6.i350: ; preds = %bb2.i 67 br label %bb2.i 68 69 KBBlockZero.exit: ; preds = %bb2.i 70 indirectbr i8* undef, [label %KBBlockZero_return_1, label %KBBlockZero_return_0] 71 } 72 73 74 ; If-converter was checking for the wrong predicate subsumes pattern when doing 75 ; nested predicates. 76 ; E.g., Let A be a basic block that flows conditionally into B and B be a 77 ; predicated block. 78 ; B can be predicated with A.BrToBPredicate into A iff B.Predicate is less 79 ; "permissive" than A.BrToBPredicate, i.e., iff A.BrToBPredicate subsumes 80 ; B.Predicate. 81 ; <rdar://problem/14379453> 82 83 ; Hard-coded registers comes from the ABI. 84 ; CHECK: wrapDistance: 85 ; CHECK: cmp r1, #59 86 ; CHECK-NEXT: itt le 87 ; CHECK-NEXT: suble r0, r2, #1 88 ; CHECK-NEXT: bxle lr 89 ; CHECK-NEXT: subs [[REG:r[0-9]+]], #120 90 ; CHECK-NEXT: cmp [[REG]], r1 91 ; CHECK-NOT: it lt 92 ; CHECK-NEXT: bge [[LABEL:.+]] 93 ; Next BB 94 ; CHECK-NOT: cmplt 95 ; CHECK: cmp r0, #119 96 ; CHECK-NEXT: itt le 97 ; CHECK-NEXT: addle r0, r1, #1 98 ; CHECK-NEXT: bxle lr 99 ; Next BB 100 ; CHECK: [[LABEL]]: 101 ; CHECK-NEXT: subs r0, r1, r0 102 ; CHECK-NEXT: bx lr 103 define i32 @wrapDistance(i32 %tx, i32 %sx, i32 %w) { 104 entry: 105 %cmp = icmp slt i32 %sx, 60 106 br i1 %cmp, label %if.then, label %if.else 107 108 if.then: ; preds = %entry 109 %sub = add nsw i32 %w, -1 110 br label %return 111 112 if.else: ; preds = %entry 113 %sub1 = add nsw i32 %w, -120 114 %cmp2 = icmp slt i32 %sub1, %sx 115 %cmp3 = icmp slt i32 %tx, 120 116 %or.cond = and i1 %cmp2, %cmp3 117 br i1 %or.cond, label %if.then4, label %if.end5 118 119 if.then4: ; preds = %if.else 120 %add = add nsw i32 %sx, 1 121 br label %return 122 123 if.end5: ; preds = %if.else 124 %sub6 = sub nsw i32 %sx, %tx 125 br label %return 126 127 return: ; preds = %if.end5, %if.then4, %if.then 128 %retval.0 = phi i32 [ %sub, %if.then ], [ %add, %if.then4 ], [ %sub6, %if.end5 ] 129 ret i32 %retval.0 130 } 131
