; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt < %s -passes=lcssa -S -verify-loop-info | FileCheck %s ; LCSSA doesn't need to transform uses in blocks not reachable ; from the entry block. ; PR6546 define void @test_pr6546(ptr %src, i1 %c) { ; CHECK-LABEL: @test_pr6546( ; CHECK-NEXT: bb: ; CHECK-NEXT: br label [[BB44:%.*]] ; CHECK: bb44: ; CHECK-NEXT: br i1 [[C:%.*]], label [[BB7:%.*]], label [[BB45:%.*]] ; CHECK: bb7: ; CHECK-NEXT: [[TMP:%.*]] = getelementptr ptr, ptr [[SRC:%.*]], i64 3 ; CHECK-NEXT: br label [[BB15:%.*]] ; CHECK: bb15: ; CHECK-NEXT: br label [[BB44]] ; CHECK: bb32: ; CHECK-NEXT: [[TMP33:%.*]] = load ptr, ptr [[TMP]], align 8 ; CHECK-NEXT: br label [[BB45]] ; CHECK: bb45: ; CHECK-NEXT: unreachable ; bb: br label %bb44 bb44: br i1 %c, label %bb7, label %bb45 bb7: %tmp = getelementptr ptr, ptr %src, i64 3 br label %bb15 bb15: br label %bb44 bb32: %tmp33 = load ptr, ptr %tmp, align 8 br label %bb45 bb45: unreachable } define void @multiple_unreachable_uses(ptr %A, ptr %B) { entry: br label %loop loop: %gep.A = getelementptr inbounds float, ptr %A, i64 10 %gep.B = getelementptr inbounds ptr, ptr %B, i64 20 br i1 false, label %exit, label %loop dead: ; No predecessors! %l1 = load float, ptr %gep.A, align 4 %l2 = load ptr, ptr %gep.B, align 8 br label %exit exit: ret void }