1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=lcssa -S -verify-loop-info | FileCheck %s 3 4; LCSSA doesn't need to transform uses in blocks not reachable 5; from the entry block. 6 7; PR6546 8define void @test_pr6546(ptr %src, i1 %c) { 9; CHECK-LABEL: @test_pr6546( 10; CHECK-NEXT: bb: 11; CHECK-NEXT: br label [[BB44:%.*]] 12; CHECK: bb44: 13; CHECK-NEXT: br i1 [[C:%.*]], label [[BB7:%.*]], label [[BB45:%.*]] 14; CHECK: bb7: 15; CHECK-NEXT: [[TMP:%.*]] = getelementptr ptr, ptr [[SRC:%.*]], i64 3 16; CHECK-NEXT: br label [[BB15:%.*]] 17; CHECK: bb15: 18; CHECK-NEXT: br label [[BB44]] 19; CHECK: bb32: 20; CHECK-NEXT: [[TMP33:%.*]] = load ptr, ptr [[TMP]], align 8 21; CHECK-NEXT: br label [[BB45]] 22; CHECK: bb45: 23; CHECK-NEXT: unreachable 24; 25bb: 26 br label %bb44 27 28bb44: 29 br i1 %c, label %bb7, label %bb45 30 31bb7: 32 %tmp = getelementptr ptr, ptr %src, i64 3 33 br label %bb15 34 35bb15: 36 br label %bb44 37 38bb32: 39 %tmp33 = load ptr, ptr %tmp, align 8 40 br label %bb45 41 42bb45: 43 unreachable 44} 45 46define void @multiple_unreachable_uses(ptr %A, ptr %B) { 47entry: 48 br label %loop 49 50loop: 51 %gep.A = getelementptr inbounds float, ptr %A, i64 10 52 %gep.B = getelementptr inbounds ptr, ptr %B, i64 20 53 br i1 false, label %exit, label %loop 54 55dead: ; No predecessors! 56 %l1 = load float, ptr %gep.A, align 4 57 %l2 = load ptr, ptr %gep.B, align 8 58 br label %exit 59 60exit: 61 ret void 62} 63