1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -hardware-loops -S -verify-loop-lcssa %s | FileCheck %s 3 4target datalayout = "E-m:e-i64:64-n32:64" 5target triple = "ppc64-unknown-linux-elf" 6 7declare i1 @cond() readnone 8 9; Make sure we do not crash on the test. 10 11define void @test() { 12; CHECK-LABEL: @test( 13; CHECK-NEXT: entry: 14; CHECK-NEXT: br label [[WHILE_COND:%.*]] 15; CHECK: while.cond: 16; CHECK-NEXT: br label [[FOR_BODY:%.*]] 17; CHECK: for.body: 18; CHECK-NEXT: br label [[FOR_INC:%.*]] 19; CHECK: for.inc: 20; CHECK-NEXT: [[C_0:%.*]] = call i1 @cond() 21; CHECK-NEXT: br i1 [[C_0]], label [[WHILE_COND25:%.*]], label [[FOR_BODY]] 22; CHECK: while.cond25: 23; CHECK-NEXT: [[INDVAR:%.*]] = phi i64 [ [[INDVAR_NEXT:%.*]], [[LAND_RHS:%.*]] ], [ 0, [[FOR_INC]] ] 24; CHECK-NEXT: [[INDVARS_IV349:%.*]] = phi i64 [ [[INDVARS_IV_NEXT350:%.*]], [[LAND_RHS]] ], [ 50, [[FOR_INC]] ] 25; CHECK-NEXT: [[CMP26_NOT:%.*]] = icmp eq i64 [[INDVARS_IV349]], 0 26; CHECK-NEXT: br i1 [[CMP26_NOT]], label [[WHILE_END187:%.*]], label [[LAND_RHS]] 27; CHECK: land.rhs: 28; CHECK-NEXT: [[INDVARS_IV_NEXT350]] = add nsw i64 [[INDVARS_IV349]], -1 29; CHECK-NEXT: [[C_1:%.*]] = call i1 @cond() 30; CHECK-NEXT: [[INDVAR_NEXT]] = add i64 [[INDVAR]], 1 31; CHECK-NEXT: br i1 [[C_1]], label [[WHILE_COND25]], label [[WHILE_END:%.*]] 32; CHECK: while.end: 33; CHECK-NEXT: [[INDVAR_LCSSA1:%.*]] = phi i64 [ [[INDVAR]], [[LAND_RHS]] ] 34; CHECK-NEXT: [[C_2:%.*]] = call i1 @cond() 35; CHECK-NEXT: br i1 [[C_2]], label [[WHILE_END187]], label [[WHILE_COND35_PREHEADER:%.*]] 36; CHECK: while.cond35.preheader: 37; CHECK-NEXT: [[TMP0:%.*]] = mul nsw i64 [[INDVAR_LCSSA1]], -1 38; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[TMP0]], 51 39; CHECK-NEXT: call void @llvm.set.loop.iterations.i64(i64 [[TMP1]]) 40; CHECK-NEXT: br label [[WHILE_COND35:%.*]] 41; CHECK: while.cond35: 42; CHECK-NEXT: [[TMP2:%.*]] = call i1 @llvm.loop.decrement.i64(i64 1) 43; CHECK-NEXT: br i1 [[TMP2]], label [[LAND_RHS37:%.*]], label [[IF_END51:%.*]] 44; CHECK: land.rhs37: 45; CHECK-NEXT: br label [[WHILE_COND35]] 46; CHECK: if.end51: 47; CHECK-NEXT: br label [[WHILE_COND_BACKEDGE:%.*]] 48; CHECK: while.cond.backedge: 49; CHECK-NEXT: br label [[WHILE_COND]] 50; CHECK: while.end187: 51; CHECK-NEXT: ret void 52; 53entry: 54 br label %while.cond 55 56while.cond: ; preds = %while.cond.backedge, %entry 57 br label %for.body 58 59for.body: ; preds = %for.inc, %while.cond 60 br label %for.inc 61 62for.inc: ; preds = %for.body 63 %c.0 = call i1 @cond() 64 br i1 %c.0, label %while.cond25, label %for.body 65 66while.cond25: ; preds = %land.rhs, %for.inc 67 %indvars.iv349 = phi i64 [ %indvars.iv.next350, %land.rhs ], [ 50, %for.inc ] 68 %cmp26.not = icmp eq i64 %indvars.iv349, 0 69 br i1 %cmp26.not, label %while.end187, label %land.rhs 70 71land.rhs: ; preds = %while.cond25 72 %indvars.iv.next350 = add nsw i64 %indvars.iv349, -1 73 %c.1 = call i1 @cond() 74 br i1 %c.1, label %while.cond25, label %while.end 75 76while.end: ; preds = %land.rhs 77 %c.2 = call i1 @cond() 78 br i1 %c.2, label %while.end187, label %while.cond35.preheader 79 80while.cond35.preheader: ; preds = %while.end 81 %0 = and i64 %indvars.iv349, 4294967295 82 br label %while.cond35 83 84while.cond35: ; preds = %land.rhs37, %while.cond35.preheader 85 %indvars.iv351 = phi i64 [ %0, %while.cond35.preheader ], [ %indvars.iv.next352, %land.rhs37 ] 86 %cmp36 = icmp sgt i64 %indvars.iv351, 0 87 br i1 %cmp36, label %land.rhs37, label %if.end51 88 89land.rhs37: ; preds = %while.cond35 90 %indvars.iv.next352 = add nsw i64 %indvars.iv351, -1 91 br label %while.cond35 92 93if.end51: ; preds = %while.cond35 94 br label %while.cond.backedge 95 96while.cond.backedge: ; preds = %if.end51 97 br label %while.cond 98 99while.end187: ; preds = %while.end, %while.cond25 100 ret void 101} 102