1 ; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s 2 3 ; These tests make sure the compiler is optimizing branches using predicates 4 ; when it is legal to do so. 5 6 ; CHECK: @simple_if 7 ; CHECK: PRED_SET{{[EGN][ET]*}}_INT Pred, 8 ; CHECK: LSHL T{{[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}, 1, 0(0.000000e+00) Pred_sel 9 define void @simple_if(i32 addrspace(1)* %out, i32 %in) { 10 entry: 11 %0 = icmp sgt i32 %in, 0 12 br i1 %0, label %IF, label %ENDIF 13 14 IF: 15 %1 = shl i32 %in, 1 16 br label %ENDIF 17 18 ENDIF: 19 %2 = phi i32 [ %in, %entry ], [ %1, %IF ] 20 store i32 %2, i32 addrspace(1)* %out 21 ret void 22 } 23 24 ; CHECK: @simple_if_else 25 ; CHECK: PRED_SET{{[EGN][ET]*}}_INT Pred, 26 ; CHECK: LSH{{[LR] T[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}, 1, 0(0.000000e+00) Pred_sel 27 ; CHECK: LSH{{[LR] T[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}, 1, 0(0.000000e+00) Pred_sel 28 define void @simple_if_else(i32 addrspace(1)* %out, i32 %in) { 29 entry: 30 %0 = icmp sgt i32 %in, 0 31 br i1 %0, label %IF, label %ELSE 32 33 IF: 34 %1 = shl i32 %in, 1 35 br label %ENDIF 36 37 ELSE: 38 %2 = lshr i32 %in, 1 39 br label %ENDIF 40 41 ENDIF: 42 %3 = phi i32 [ %1, %IF ], [ %2, %ELSE ] 43 store i32 %3, i32 addrspace(1)* %out 44 ret void 45 } 46 47 ; CHECK: @nested_if 48 ; CHECK: IF_PREDICATE_SET 49 ; CHECK: PRED_SET{{[EGN][ET]*}}_INT Pred, 50 ; CHECK: LSHL T{{[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}, 1, 0(0.000000e+00) Pred_sel 51 ; CHECK: ENDIF 52 define void @nested_if(i32 addrspace(1)* %out, i32 %in) { 53 entry: 54 %0 = icmp sgt i32 %in, 0 55 br i1 %0, label %IF0, label %ENDIF 56 57 IF0: 58 %1 = add i32 %in, 10 59 %2 = icmp sgt i32 %1, 0 60 br i1 %2, label %IF1, label %ENDIF 61 62 IF1: 63 %3 = shl i32 %1, 1 64 br label %ENDIF 65 66 ENDIF: 67 %4 = phi i32 [%in, %entry], [%1, %IF0], [%3, %IF1] 68 store i32 %4, i32 addrspace(1)* %out 69 ret void 70 } 71 72 ; CHECK: @nested_if_else 73 ; CHECK: IF_PREDICATE_SET 74 ; CHECK: PRED_SET{{[EGN][ET]*}}_INT Pred, 75 ; CHECK: LSH{{[LR] T[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}, 1, 0(0.000000e+00) Pred_sel 76 ; CHECK: LSH{{[LR] T[0-9]+\.[XYZW], T[0-9]+\.[XYZW]}}, 1, 0(0.000000e+00) Pred_sel 77 ; CHECK: ENDIF 78 define void @nested_if_else(i32 addrspace(1)* %out, i32 %in) { 79 entry: 80 %0 = icmp sgt i32 %in, 0 81 br i1 %0, label %IF0, label %ENDIF 82 83 IF0: 84 %1 = add i32 %in, 10 85 %2 = icmp sgt i32 %1, 0 86 br i1 %2, label %IF1, label %ELSE1 87 88 IF1: 89 %3 = shl i32 %1, 1 90 br label %ENDIF 91 92 ELSE1: 93 %4 = lshr i32 %in, 1 94 br label %ENDIF 95 96 ENDIF: 97 %5 = phi i32 [%in, %entry], [%3, %IF1], [%4, %ELSE1] 98 store i32 %5, i32 addrspace(1)* %out 99 ret void 100 } 101
