1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2 2; RUN: opt -passes=indvars -S %s | FileCheck %s 3 4@a = global [4 x i32] zeroinitializer, align 16 5 6define i32 @test() { 7; CHECK-LABEL: define i32 @test() { 8; CHECK-NEXT: entry: 9; CHECK-NEXT: br label [[LOOP_HEADER:%.*]] 10; CHECK: loop.header: 11; CHECK-NEXT: [[IV:%.*]] = phi i8 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ] 12; CHECK-NEXT: [[RED:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[RED_NEXT:%.*]], [[LOOP_LATCH]] ] 13; CHECK-NEXT: [[IDXPROM:%.*]] = zext i8 [[IV]] to i64 14; CHECK-NEXT: [[GEP:%.*]] = getelementptr i32, ptr @a, i64 [[IDXPROM]] 15; CHECK-NEXT: br i1 false, label [[LOOP_LATCH]], label [[EXIT_1:%.*]] 16; CHECK: loop.latch: 17; CHECK-NEXT: [[L:%.*]] = load i32, ptr [[GEP]], align 4 18; CHECK-NEXT: [[RED_NEXT]] = add nsw i32 [[L]], [[RED]] 19; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i8 [[IV]], 1 20; CHECK-NEXT: br i1 true, label [[LOOP_HEADER]], label [[EXIT_2:%.*]] 21; CHECK: exit.1: 22; CHECK-NEXT: ret i32 0 23; CHECK: exit.2: 24; CHECK-NEXT: [[ADD_LCSSA:%.*]] = phi i32 [ [[RED_NEXT]], [[LOOP_LATCH]] ] 25; CHECK-NEXT: ret i32 [[ADD_LCSSA]] 26; 27entry: 28 br label %loop.header 29 30loop.header: 31 %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop.latch ] 32 %red = phi i32 [ 0, %entry ], [ %red.next, %loop.latch ] 33 %idxprom = zext i8 %iv to i64 34 %gep = getelementptr i32, ptr @a, i64 %idxprom 35 %f = icmp ult ptr %gep, getelementptr inbounds ([4 x i32], ptr @a, i64 1, i64 0) 36 br i1 %f, label %loop.latch, label %exit.1 37 38loop.latch: 39 %l = load i32, ptr %gep, align 4 40 %red.next = add nsw i32 %l, %red 41 %iv.next = add nuw nsw i8 %iv, 1 42 %cmp = icmp ult i8 %iv, 4 43 br i1 %cmp, label %loop.header, label %exit.2 44 45exit.1: ; preds = %for.body 46 ret i32 0 47 48exit.2: 49 %add.lcssa = phi i32 [ %red.next, %loop.latch ] 50 ret i32 %add.lcssa 51} 52