1; REQUIRES: asserts 2; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s --check-prefix=ASM 3; RUN: llc -debug -o /dev/null < %s -mtriple=x86_64-- 2>&1 | FileCheck %s --check-prefix=DBG 4; rdar://8168938 5 6; This testcase involves SCEV normalization with the exit value from 7; one loop involved with the increment value for an addrec on another 8; loop. The expression should be properly normalized and simplified, 9; and require only a single division. 10 11; DBG-NOT: DISCARDING (NORMALIZATION ISN'T INVERTIBLE) 12; ASM: div 13; ASM-NOT: div 14 15%0 = type { ptr, ptr } 16 17@0 = private constant [13 x i8] c"Result: %lu\0A\00" ; <ptr> [#uses=1] 18@1 = internal constant [5 x i8] c"Huh?\00" ; <ptr> [#uses=1] 19 20define i32 @main(i32 %arg, ptr nocapture %arg1) nounwind { 21bb: 22 %tmp = alloca %0, align 8 ; <ptr> [#uses=11] 23 call void @llvm.memset.p0.i64(ptr align 8 %tmp, i8 0, i64 16, i1 false) nounwind 24 %tmp3 = getelementptr inbounds %0, ptr %tmp, i64 0, i32 0 ; <ptr> [#uses=3] 25 store ptr %tmp, ptr %tmp3 26 %tmp4 = getelementptr inbounds %0, ptr %tmp, i64 0, i32 1 ; <ptr> [#uses=1] 27 store ptr %tmp, ptr %tmp4 28 %tmp5 = call noalias ptr @_Znwm(i64 24) nounwind ; <ptr> [#uses=2] 29 %tmp6 = getelementptr inbounds i8, ptr %tmp5, i64 16 ; <ptr> [#uses=2] 30 %tmp7 = icmp eq ptr %tmp6, null ; <i1> [#uses=1] 31 br i1 %tmp7, label %bb10, label %bb8 32 33bb8: ; preds = %bb 34 store i32 1, ptr %tmp6 35 br label %bb10 36 37bb10: ; preds = %bb8, %bb 38 call void @_ZNSt15_List_node_base4hookEPS_(ptr %tmp5, ptr %tmp) nounwind 39 %tmp12 = load ptr, ptr %tmp3 ; <ptr> [#uses=3] 40 %tmp13 = icmp eq ptr %tmp12, %tmp ; <i1> [#uses=1] 41 br i1 %tmp13, label %bb14, label %bb16 42 43bb14: ; preds = %bb10 44 %tmp15 = call i32 @puts(ptr @1) 45 br label %bb35 46 47bb16: ; preds = %bb16, %bb10 48 %tmp17 = phi i64 [ %tmp22, %bb16 ], [ 0, %bb10 ] ; <i64> [#uses=1] 49 %tmp18 = phi ptr [ %tmp20, %bb16 ], [ %tmp12, %bb10 ] ; <ptr> [#uses=1] 50 %tmp19 = getelementptr inbounds %0, ptr %tmp18, i64 0, i32 0 ; <ptr> [#uses=1] 51 %tmp20 = load ptr, ptr %tmp19 ; <ptr> [#uses=2] 52 %tmp21 = icmp eq ptr %tmp20, %tmp ; <i1> [#uses=1] 53 %tmp22 = add i64 %tmp17, 1 ; <i64> [#uses=2] 54 br i1 %tmp21, label %bb23, label %bb16 55 56bb23: ; preds = %bb16 57 %tmp24 = udiv i64 100, %tmp22 ; <i64> [#uses=1] 58 br label %bb25 59 60bb25: ; preds = %bb25, %bb23 61 %tmp26 = phi i64 [ %tmp31, %bb25 ], [ 0, %bb23 ] ; <i64> [#uses=1] 62 %tmp27 = phi ptr [ %tmp29, %bb25 ], [ %tmp12, %bb23 ] ; <ptr> [#uses=1] 63 %tmp28 = getelementptr inbounds %0, ptr %tmp27, i64 0, i32 0 ; <ptr> [#uses=1] 64 %tmp29 = load ptr, ptr %tmp28 ; <ptr> [#uses=2] 65 %tmp30 = icmp eq ptr %tmp29, %tmp ; <i1> [#uses=1] 66 %tmp31 = add i64 %tmp26, 1 ; <i64> [#uses=2] 67 br i1 %tmp30, label %bb32, label %bb25 68 69bb32: ; preds = %bb25 70 %tmp33 = mul i64 %tmp31, %tmp24 ; <i64> [#uses=1] 71 %tmp34 = call i32 (ptr, ...) @printf(ptr @0, i64 %tmp33) nounwind 72 br label %bb35 73 74bb35: ; preds = %bb32, %bb14 75 %tmp36 = load ptr, ptr %tmp3 ; <ptr> [#uses=2] 76 %tmp37 = icmp eq ptr %tmp36, %tmp ; <i1> [#uses=1] 77 br i1 %tmp37, label %bb44, label %bb38 78 79bb38: ; preds = %bb38, %bb35 80 %tmp39 = phi ptr [ %tmp41, %bb38 ], [ %tmp36, %bb35 ] ; <ptr> [#uses=2] 81 %tmp40 = getelementptr inbounds %0, ptr %tmp39, i64 0, i32 0 ; <ptr> [#uses=1] 82 %tmp41 = load ptr, ptr %tmp40 ; <ptr> [#uses=2] 83 call void @_ZdlPv(ptr %tmp39) nounwind 84 %tmp43 = icmp eq ptr %tmp41, %tmp ; <i1> [#uses=1] 85 br i1 %tmp43, label %bb44, label %bb38 86 87bb44: ; preds = %bb38, %bb35 88 ret i32 0 89} 90 91declare i32 @printf(ptr nocapture, ...) nounwind 92 93declare void @_ZNSt15_List_node_base4hookEPS_(ptr, ptr) 94 95declare noalias ptr @_Znwm(i64) 96 97declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) nounwind 98 99declare void @_ZdlPv(ptr) nounwind 100 101declare i32 @puts(ptr nocapture) nounwind 102