; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt -S -loop-guard-widening -enable-new-pm=0 < %s | FileCheck %s ; RUN: opt -S -passes="loop(guard-widening)" < %s | FileCheck %s declare void @llvm.experimental.guard(i1,...) @G = external global i32 ; Show that we can widen into early checks within a loop, and in the process ; expose optimization oppurtunities. define void @widen_within_loop(i1 %cond_0, i1 %cond_1, i1 %cond_2) { ; CHECK-LABEL: @widen_within_loop( ; CHECK-NEXT: entry: ; CHECK-NEXT: br label [[LOOP:%.*]] ; CHECK: loop: ; CHECK-NEXT: store i32 0, i32* @G ; CHECK-NEXT: [[WIDE_CHK:%.*]] = and i1 [[COND_0:%.*]], [[COND_1:%.*]] ; CHECK-NEXT: [[WIDE_CHK1:%.*]] = and i1 [[WIDE_CHK]], [[COND_2:%.*]] ; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WIDE_CHK1]]) [ "deopt"(i32 0) ] ; CHECK-NEXT: store i32 1, i32* @G ; CHECK-NEXT: store i32 2, i32* @G ; CHECK-NEXT: store i32 3, i32* @G ; CHECK-NEXT: br label [[LOOP]] ; entry: br label %loop loop: store i32 0, i32* @G call void(i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"(i32 0) ] store i32 1, i32* @G call void(i1, ...) @llvm.experimental.guard(i1 %cond_1) [ "deopt"(i32 1) ] store i32 2, i32* @G call void(i1, ...) @llvm.experimental.guard(i1 %cond_2) [ "deopt"(i32 2) ] store i32 3, i32* @G br label %loop } define void @widen_into_preheader(i1 %cond_0, i1 %cond_1, i1 %cond_2) { ; CHECK-LABEL: @widen_into_preheader( ; CHECK-NEXT: entry: ; CHECK-NEXT: store i32 0, i32* @G ; CHECK-NEXT: [[WIDE_CHK:%.*]] = and i1 [[COND_0:%.*]], [[COND_1:%.*]] ; CHECK-NEXT: [[WIDE_CHK1:%.*]] = and i1 [[WIDE_CHK]], [[COND_2:%.*]] ; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WIDE_CHK1]]) [ "deopt"(i32 0) ] ; CHECK-NEXT: br label [[LOOP:%.*]] ; CHECK: loop: ; CHECK-NEXT: store i32 1, i32* @G ; CHECK-NEXT: store i32 2, i32* @G ; CHECK-NEXT: store i32 3, i32* @G ; CHECK-NEXT: br label [[LOOP]] ; entry: store i32 0, i32* @G call void(i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"(i32 0) ] br label %loop loop: store i32 1, i32* @G call void(i1, ...) @llvm.experimental.guard(i1 %cond_1) [ "deopt"(i32 1) ] store i32 2, i32* @G call void(i1, ...) @llvm.experimental.guard(i1 %cond_2) [ "deopt"(i32 2) ] store i32 3, i32* @G br label %loop } define void @dont_widen_over_common_exit(i1 %cond_0, i1 %cond_1, i1 %cond_2) { ; CHECK-LABEL: @dont_widen_over_common_exit( ; CHECK-NEXT: entry: ; CHECK-NEXT: br label [[LOOP:%.*]] ; CHECK: loop: ; CHECK-NEXT: store i32 0, i32* @G ; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND_0:%.*]]) [ "deopt"(i32 0) ] ; CHECK-NEXT: store i32 1, i32* @G ; CHECK-NEXT: br i1 [[COND_1:%.*]], label [[BACKEDGE:%.*]], label [[EXIT:%.*]] ; CHECK: backedge: ; CHECK-NEXT: store i32 2, i32* @G ; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND_2:%.*]]) [ "deopt"(i32 2) ] ; CHECK-NEXT: store i32 3, i32* @G ; CHECK-NEXT: br label [[LOOP]] ; CHECK: exit: ; CHECK-NEXT: ret void ; entry: br label %loop loop: store i32 0, i32* @G call void(i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"(i32 0) ] store i32 1, i32* @G br i1 %cond_1, label %backedge, label %exit backedge: store i32 2, i32* @G call void(i1, ...) @llvm.experimental.guard(i1 %cond_2) [ "deopt"(i32 2) ] store i32 3, i32* @G br label %loop exit: ret void } define void @widen_over_common_exit_to_ph(i1 %cond_0, i1 %cond_1, i1 %cond_2) { ; CHECK-LABEL: @widen_over_common_exit_to_ph( ; CHECK-NEXT: entry: ; CHECK-NEXT: store i32 0, i32* @G ; CHECK-NEXT: [[WIDE_CHK:%.*]] = and i1 [[COND_0:%.*]], [[COND_2:%.*]] ; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WIDE_CHK]]) [ "deopt"(i32 0) ] ; CHECK-NEXT: br label [[LOOP:%.*]] ; CHECK: loop: ; CHECK-NEXT: store i32 1, i32* @G ; CHECK-NEXT: br i1 [[COND_1:%.*]], label [[BACKEDGE:%.*]], label [[EXIT:%.*]] ; CHECK: backedge: ; CHECK-NEXT: store i32 2, i32* @G ; CHECK-NEXT: store i32 3, i32* @G ; CHECK-NEXT: br label [[LOOP]] ; CHECK: exit: ; CHECK-NEXT: ret void ; entry: store i32 0, i32* @G call void(i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"(i32 0) ] br label %loop loop: store i32 1, i32* @G br i1 %cond_1, label %backedge, label %exit backedge: store i32 2, i32* @G call void(i1, ...) @llvm.experimental.guard(i1 %cond_2) [ "deopt"(i32 2) ] store i32 3, i32* @G br label %loop exit: ret void }