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Diffstat (limited to 'test/Transforms/LoopPredication/basic.ll')
| -rw-r--r-- | test/Transforms/LoopPredication/basic.ll | 571 |
1 files changed, 571 insertions, 0 deletions
diff --git a/test/Transforms/LoopPredication/basic.ll b/test/Transforms/LoopPredication/basic.ll new file mode 100644 index 000000000000..6ce07819cb03 --- /dev/null +++ b/test/Transforms/LoopPredication/basic.ll @@ -0,0 +1,571 @@ +; RUN: opt -S -loop-predication < %s 2>&1 | FileCheck %s +; RUN: opt -S -passes='require<scalar-evolution>,loop(loop-predication)' < %s 2>&1 | FileCheck %s + +declare void @llvm.experimental.guard(i1, ...) + +define i32 @unsigned_loop_0_to_n_ult_check(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @unsigned_loop_0_to_n_ult_check +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK: [[max_index:[^ ]+]] = add i32 %n, -1 +; CHECK-NEXT: [[wide_cond:[^ ]+]] = icmp ult i32 [[max_index]], %length +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 [[wide_cond]], i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @unsigned_loop_0_to_n_ugt_check(i32* %array, i32 %length, i32 %n) { +; CHECK-LABEL: @unsigned_loop_0_to_n_ugt_check +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK: [[max_index:[^ ]+]] = add i32 %n, -1 +; CHECK-NEXT: [[wide_cond:[^ ]+]] = icmp ult i32 [[max_index]], %length +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 [[wide_cond]], i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ugt i32 %length, %i + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + + +define i32 @two_range_checks(i32* %array.1, i32 %length.1, + i32* %array.2, i32 %length.2, i32 %n) { +; CHECK-LABEL: @two_range_checks +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK: [[max_index:[^ ]+]] = add i32 %n, -1 +; CHECK-NEXT: [[wide_cond_1:[^ ]+]] = icmp ult i32 [[max_index]], %length.{{1|2}} +; CHECK-NEXT: [[wide_cond_2:[^ ]+]] = icmp ult i32 [[max_index]], %length.{{1|2}} +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: [[wide_cond:[^ ]+]] = and i1 [[wide_cond_1]], [[wide_cond_2]] +; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 [[wide_cond]], i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds.1 = icmp ult i32 %i, %length.1 + %within.bounds.2 = icmp ult i32 %i, %length.2 + %within.bounds = and i1 %within.bounds.1, %within.bounds.2 + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.1.i.ptr = getelementptr inbounds i32, i32* %array.1, i64 %i.i64 + %array.1.i = load i32, i32* %array.1.i.ptr, align 4 + %loop.acc.1 = add i32 %loop.acc, %array.1.i + + %array.2.i.ptr = getelementptr inbounds i32, i32* %array.2, i64 %i.i64 + %array.2.i = load i32, i32* %array.2.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc.1, %array.2.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @three_range_checks(i32* %array.1, i32 %length.1, + i32* %array.2, i32 %length.2, + i32* %array.3, i32 %length.3, i32 %n) { +; CHECK-LABEL: @three_range_checks +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK: [[max_index:[^ ]+]] = add i32 %n, -1 +; CHECK-NEXT: [[wide_cond_1:[^ ]+]] = icmp ult i32 [[max_index]], %length.{{1|2|3}} +; CHECK-NEXT: [[wide_cond_2:[^ ]+]] = icmp ult i32 [[max_index]], %length.{{1|2|3}} +; CHECK-NEXT: [[wide_cond_3:[^ ]+]] = icmp ult i32 [[max_index]], %length.{{1|2|3}} +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: [[wide_cond_and:[^ ]+]] = and i1 [[wide_cond_1]], [[wide_cond_2]] +; CHECK-NEXT: [[wide_cond:[^ ]+]] = and i1 [[wide_cond_and]], [[wide_cond_3]] +; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 [[wide_cond]], i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds.1 = icmp ult i32 %i, %length.1 + %within.bounds.2 = icmp ult i32 %i, %length.2 + %within.bounds.3 = icmp ult i32 %i, %length.3 + %within.bounds.1.and.2 = and i1 %within.bounds.1, %within.bounds.2 + %within.bounds = and i1 %within.bounds.1.and.2, %within.bounds.3 + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.1.i.ptr = getelementptr inbounds i32, i32* %array.1, i64 %i.i64 + %array.1.i = load i32, i32* %array.1.i.ptr, align 4 + %loop.acc.1 = add i32 %loop.acc, %array.1.i + + %array.2.i.ptr = getelementptr inbounds i32, i32* %array.2, i64 %i.i64 + %array.2.i = load i32, i32* %array.2.i.ptr, align 4 + %loop.acc.2 = add i32 %loop.acc.1, %array.2.i + + %array.3.i.ptr = getelementptr inbounds i32, i32* %array.3, i64 %i.i64 + %array.3.i = load i32, i32* %array.3.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc.2, %array.3.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @three_guards(i32* %array.1, i32 %length.1, + i32* %array.2, i32 %length.2, + i32* %array.3, i32 %length.3, i32 %n) { +; CHECK-LABEL: @three_guards +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK: [[max_index:[^ ]+]] = add i32 %n, -1 +; CHECK-NEXT: [[wide_cond_1:[^ ]+]] = icmp ult i32 [[max_index]], %length.1 +; CHECK-NEXT: [[wide_cond_2:[^ ]+]] = icmp ult i32 [[max_index]], %length.2 +; CHECK-NEXT: [[wide_cond_3:[^ ]+]] = icmp ult i32 [[max_index]], %length.3 +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 [[wide_cond_1]], i32 9) [ "deopt"() ] +; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 [[wide_cond_2]], i32 9) [ "deopt"() ] +; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 [[wide_cond_3]], i32 9) [ "deopt"() ] + + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + + %within.bounds.1 = icmp ult i32 %i, %length.1 + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds.1, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.1.i.ptr = getelementptr inbounds i32, i32* %array.1, i64 %i.i64 + %array.1.i = load i32, i32* %array.1.i.ptr, align 4 + %loop.acc.1 = add i32 %loop.acc, %array.1.i + + %within.bounds.2 = icmp ult i32 %i, %length.2 + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds.2, i32 9) [ "deopt"() ] + + %array.2.i.ptr = getelementptr inbounds i32, i32* %array.2, i64 %i.i64 + %array.2.i = load i32, i32* %array.2.i.ptr, align 4 + %loop.acc.2 = add i32 %loop.acc.1, %array.2.i + + %within.bounds.3 = icmp ult i32 %i, %length.3 + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds.3, i32 9) [ "deopt"() ] + + %array.3.i.ptr = getelementptr inbounds i32, i32* %array.3, i64 %i.i64 + %array.3.i = load i32, i32* %array.3.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc.2, %array.3.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_start_to_n_sge_0_check(i32* %array, i32 %length, i32 %start, i32 %n) { +; CHECK-LABEL: @signed_loop_start_to_n_sge_0_check +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK-NEXT: [[wide_cond:[^ ]+]] = icmp sge i32 %start, 0 +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 [[wide_cond]], i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ %start, %loop.preheader ] + %within.bounds = icmp sge i32 %i, 0 + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nsw i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_start_to_n_upper_slt_length_check(i32* %array, i32 %length, i32 %start, i32 %n) { +; CHECK-LABEL: @signed_loop_start_to_n_upper_slt_length_check +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK: [[start_1:[^ ]+]] = add i32 %start, 1 +; CHECK-NEXT: [[n_sgt_start_1:[^ ]+]] = icmp sgt i32 %n, [[start_1]] +; CHECK-NEXT: [[smax:[^ ]+]] = select i1 [[n_sgt_start_1]], i32 %n, i32 [[start_1]] +; CHECK-NEXT: [[max_index:[^ ]+]] = add i32 [[smax]], -1 +; CHECK-NEXT: [[wide_cond:[^ ]+]] = icmp slt i32 [[max_index]], %length +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 [[wide_cond]], i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ %start, %loop.preheader ] + %within.bounds = icmp slt i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nsw i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_start_to_n_both_checks(i32* %array, i32 %length, i32 %start, i32 %n) { +; CHECK-LABEL: @signed_loop_start_to_n_both_checks +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK: [[lower_check:[^ ]+]] = icmp sge i32 %start, 0 +; CHECK-NEXT: [[start_1:[^ ]+]] = add i32 %start, 1 +; CHECK-NEXT: [[n_sgt_start_1:[^ ]+]] = icmp sgt i32 %n, [[start_1]] +; CHECK-NEXT: [[smax:[^ ]+]] = select i1 [[n_sgt_start_1]], i32 %n, i32 [[start_1]] +; CHECK-NEXT: [[max_index:[^ ]+]] = add i32 [[smax]], -1 +; CHECK-NEXT: [[upper_check:[^ ]+]] = icmp slt i32 [[max_index]], %length +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: [[wide_cond:[^ ]+]] = and i1 [[lower_check]], [[upper_check]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[wide_cond]], i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ %start, %loop.preheader ] + %within.bounds.1 = icmp slt i32 %i, %length + %within.bounds.2 = icmp sge i32 %i, 0 + %within.bounds = and i1 %within.bounds.1, %within.bounds.2 + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nsw i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @unsigned_loop_0_to_n_unrelated_condition(i32* %array, i32 %length, i32 %n, i32 %x) { +; CHECK-LABEL: @unsigned_loop_0_to_n_unrelated_condition +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK: [[max_index:[^ ]+]] = add i32 %n, -1 +; CHECK-NEXT: [[wide_cond:[^ ]+]] = icmp ult i32 [[max_index]], %length +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: %unrelated.cond = icmp ult i32 %x, %length +; CHECK: [[guard_cond:[^ ]+]] = and i1 %unrelated.cond, [[wide_cond]] +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[guard_cond]], i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %within.bounds = icmp ult i32 %i, %length + %unrelated.cond = icmp ult i32 %x, %length + %guard.cond = and i1 %within.bounds, %unrelated.cond + call void (i1, ...) @llvm.experimental.guard(i1 %guard.cond, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +; Don't change the guard condition if there were no widened subconditions +define i32 @test_no_widened_conditions(i32* %array, i32 %length, i32 %n, i32 %x1, i32 %x2, i32 %x3) { +; CHECK-LABEL: @test_no_widened_conditions +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: %unrelated.cond.1 = icmp eq i32 %x1, %i +; CHECK-NEXT: %unrelated.cond.2 = icmp eq i32 %x2, %i +; CHECK-NEXT: %unrelated.cond.3 = icmp eq i32 %x3, %i +; CHECK-NEXT: %unrelated.cond.and.1 = and i1 %unrelated.cond.1, %unrelated.cond.2 +; CHECK-NEXT: %guard.cond = and i1 %unrelated.cond.and.1, %unrelated.cond.3 +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 %guard.cond, i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %unrelated.cond.1 = icmp eq i32 %x1, %i + %unrelated.cond.2 = icmp eq i32 %x2, %i + %unrelated.cond.3 = icmp eq i32 %x3, %i + %unrelated.cond.and.1 = and i1 %unrelated.cond.1, %unrelated.cond.2 + %guard.cond = and i1 %unrelated.cond.and.1, %unrelated.cond.3 + + call void (i1, ...) @llvm.experimental.guard(i1 %guard.cond, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_start_to_n_loop_variant_bound(i32* %array, i32 %x, i32 %start, i32 %n) { +; CHECK-LABEL: @signed_loop_start_to_n_loop_variant_bound +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: %bound = add i32 %i, %x +; CHECK-NEXT: %within.bounds = icmp slt i32 %i, %bound +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ %start, %loop.preheader ] + %bound = add i32 %i, %x + %within.bounds = icmp slt i32 %i, %bound + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nsw i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @signed_loop_start_to_n_non_monotonic_predicate(i32* %array, i32 %x, i32 %start, i32 %n) { +; CHECK-LABEL: @signed_loop_start_to_n_non_monotonic_predicate +entry: + %tmp5 = icmp sle i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: %guard.cond = icmp eq i32 %i, %x +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 %guard.cond, i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ %start, %loop.preheader ] + %guard.cond = icmp eq i32 %i, %x + call void (i1, ...) @llvm.experimental.guard(i1 %guard.cond, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nsw i32 %i, 1 + %continue = icmp slt i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @unsigned_loop_0_to_n_hoist_length(i32* %array, i16 %length.i16, i32 %n) { +; CHECK-LABEL: @unsigned_loop_0_to_n_hoist_length +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK: [[max_index:[^ ]+]] = add i32 %n, -1 +; CHECK-NEXT: [[length:[^ ]+]] = zext i16 %length.i16 to i32 +; CHECK-NEXT: [[wide_cond:[^ ]+]] = icmp ult i32 [[max_index]], [[length]] +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 [[wide_cond]], i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %length = zext i16 %length.i16 to i32 + %within.bounds = icmp ult i32 %i, %length + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} + +define i32 @unsigned_loop_0_to_n_cant_hoist_length(i32* %array, i32 %length, i32 %divider, i32 %n) { +; CHECK-LABEL: @unsigned_loop_0_to_n_cant_hoist_length +entry: + %tmp5 = icmp eq i32 %n, 0 + br i1 %tmp5, label %exit, label %loop.preheader + +loop.preheader: +; CHECK: loop.preheader: +; CHECK-NEXT: br label %loop + br label %loop + +loop: +; CHECK: loop: +; CHECK-NEXT: %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] +; CHECK-NEXT: %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] +; CHECK-NEXT: %length.udiv = udiv i32 %length, %divider +; CHECK-NEXT: %within.bounds = icmp ult i32 %i, %length.udiv +; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + %loop.acc = phi i32 [ %loop.acc.next, %loop ], [ 0, %loop.preheader ] + %i = phi i32 [ %i.next, %loop ], [ 0, %loop.preheader ] + %length.udiv = udiv i32 %length, %divider + %within.bounds = icmp ult i32 %i, %length.udiv + call void (i1, ...) @llvm.experimental.guard(i1 %within.bounds, i32 9) [ "deopt"() ] + + %i.i64 = zext i32 %i to i64 + %array.i.ptr = getelementptr inbounds i32, i32* %array, i64 %i.i64 + %array.i = load i32, i32* %array.i.ptr, align 4 + %loop.acc.next = add i32 %loop.acc, %array.i + + %i.next = add nuw i32 %i, 1 + %continue = icmp ult i32 %i.next, %n + br i1 %continue, label %loop, label %exit + +exit: + %result = phi i32 [ 0, %entry ], [ %loop.acc.next, %loop ] + ret i32 %result +} |