1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=loop-unroll -S < %s | FileCheck %s 3 4; Can't recursively delete %c.addr.07 without deleting %conv1 5; and thus invalidating iteration. 6define void @PR50368(i32 %c, i64 %x) { 7; CHECK-LABEL: @PR50368( 8; CHECK-NEXT: entry: 9; CHECK-NEXT: br label [[LOOP_PEEL_BEGIN:%.*]] 10; CHECK: loop.peel.begin: 11; CHECK-NEXT: br label [[LOOP_PEEL:%.*]] 12; CHECK: loop.peel: 13; CHECK-NEXT: br i1 false, label [[EXIT:%.*]], label [[LOOP_PEEL_NEXT:%.*]] 14; CHECK: loop.peel.next: 15; CHECK-NEXT: br label [[LOOP_PEEL_NEXT1:%.*]] 16; CHECK: loop.peel.next1: 17; CHECK-NEXT: br label [[ENTRY_PEEL_NEWPH:%.*]] 18; CHECK: entry.peel.newph: 19; CHECK-NEXT: br label [[LOOP:%.*]] 20; CHECK: loop: 21; CHECK-NEXT: br i1 false, label [[EXIT_LOOPEXIT:%.*]], label [[LOOP]], !llvm.loop [[LOOP0:![0-9]+]] 22; CHECK: exit.loopexit: 23; CHECK-NEXT: br label [[EXIT]] 24; CHECK: exit: 25; CHECK-NEXT: ret void 26; 27entry: 28 br label %loop 29 30loop: 31 %0 = phi i64 [ 0, %loop ], [ %x, %entry ] 32 %c.addr.07 = phi i32 [ %conv1, %loop ], [ %c, %entry ] 33 %conv1 = trunc i64 undef to i32 34 br i1 false, label %exit, label %loop 35 36exit: 37 ret void 38} 39 40 41define void @dead_chain(i64 %a) { 42; CHECK-LABEL: @dead_chain( 43; CHECK-NEXT: entry: 44; CHECK-NEXT: br label [[LOOP:%.*]] 45; CHECK: loop: 46; CHECK-NEXT: ret void 47; 48entry: 49 br label %loop 50 51loop: 52 %conv1 = trunc i64 %a to i32 53 %and = and i32 %conv1, 15 54 %shl = shl i32 %and, 15 55 br i1 true, label %exit, label %loop 56 57exit: 58 ret void 59} 60 61