; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=loop-bound-split -S < %s | FileCheck %s
; The transformation is failed with this test because we can not guarantee the
; split condition is always true in pre-loop after transformation.
define void @variable_split_loop_bound_and_exit_cond_inc_with_sgt(i64 %a, i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @variable_split_loop_bound_and_exit_cond_inc_with_sgt(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[LOOP_PH:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], [[A:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: if.else:
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp sgt i64 [[INC]], [[N:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %inc, %for.inc ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, %a
br i1 %cmp, label %if.then, label %if.else
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.inc
if.else:
br label %for.inc
for.inc:
%inc = add nuw nsw i64 %iv, 1
%cond = icmp sgt i64 %inc, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
; The transformation works with this test because we can guarantee the split
; condition is always true in pre-loop after transformation.
define void @umax_variable_split_loop_bound_and_exit_cond_inc_with_sgt(i64 %a, i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @umax_variable_split_loop_bound_and_exit_cond_inc_with_sgt(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: [[B:%.*]] = call i64 @llvm.umax.i64(i64 [[A:%.*]], i64 1)
; CHECK-NEXT: br label [[LOOP_PH_SPLIT:%.*]]
; CHECK: loop.ph.split:
; CHECK-NEXT: [[SMAX:%.*]] = call i64 @llvm.smax.i64(i64 [[N:%.*]], i64 0)
; CHECK-NEXT: [[NEW_BOUND:%.*]] = call i64 @llvm.smin.i64(i64 [[SMAX]], i64 [[B]])
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[LOOP_PH_SPLIT]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], [[B]]
; CHECK-NEXT: br i1 true, label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: if.else:
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp sgt i64 [[INC]], [[NEW_BOUND]]
; CHECK-NEXT: br i1 [[COND]], label [[LOOP_PH_SPLIT_SPLIT:%.*]], label [[LOOP]]
; CHECK: loop.ph.split.split:
; CHECK-NEXT: [[IV_LCSSA:%.*]] = phi i64 [ [[INC]], [[FOR_INC]] ]
; CHECK-NEXT: [[TMP0:%.*]] = icmp ne i64 [[IV_LCSSA]], [[N]]
; CHECK-NEXT: br i1 [[TMP0]], label [[LOOP_SPLIT_PREHEADER:%.*]], label [[EXIT:%.*]]
; CHECK: loop.split.preheader:
; CHECK-NEXT: br label [[LOOP_SPLIT:%.*]]
; CHECK: loop.split:
; CHECK-NEXT: [[IV_SPLIT:%.*]] = phi i64 [ [[INC_SPLIT:%.*]], [[FOR_INC_SPLIT:%.*]] ], [ [[IV_LCSSA]], [[LOOP_SPLIT_PREHEADER]] ]
; CHECK-NEXT: [[CMP_SPLIT:%.*]] = icmp ult i64 [[IV_SPLIT]], [[B]]
; CHECK-NEXT: br i1 false, label [[IF_THEN_SPLIT:%.*]], label [[IF_ELSE_SPLIT:%.*]]
; CHECK: if.else.split:
; CHECK-NEXT: br label [[FOR_INC_SPLIT]]
; CHECK: if.then.split:
; CHECK-NEXT: [[SRC_ARRAYIDX_SPLIT:%.*]] = getelementptr inbounds i64, i64* [[SRC]], i64 [[IV_SPLIT]]
; CHECK-NEXT: [[VAL_SPLIT:%.*]] = load i64, i64* [[SRC_ARRAYIDX_SPLIT]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX_SPLIT:%.*]] = getelementptr inbounds i64, i64* [[DST]], i64 [[IV_SPLIT]]
; CHECK-NEXT: store i64 [[VAL_SPLIT]], i64* [[DST_ARRAYIDX_SPLIT]], align 4
; CHECK-NEXT: br label [[FOR_INC_SPLIT]]
; CHECK: for.inc.split:
; CHECK-NEXT: [[INC_SPLIT]] = add nuw nsw i64 [[IV_SPLIT]], 1
; CHECK-NEXT: [[COND_SPLIT:%.*]] = icmp sgt i64 [[INC_SPLIT]], [[N]]
; CHECK-NEXT: br i1 [[COND_SPLIT]], label [[EXIT_LOOPEXIT:%.*]], label [[LOOP_SPLIT]]
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
%b = call i64 @llvm.umax.i64(i64 %a, i64 1)
br label %loop
loop:
%iv = phi i64 [ %inc, %for.inc ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, %b
br i1 %cmp, label %if.then, label %if.else
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.inc
if.else:
br label %for.inc
for.inc:
%inc = add nuw nsw i64 %iv, 1
%cond = icmp sgt i64 %inc, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
; The transformation works with this test because we can guarantee the split
; condition is always true in pre-loop after transformation.
define void @constant_split_loop_bound_and_exit_cond_inc_with_sgt(i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @constant_split_loop_bound_and_exit_cond_inc_with_sgt(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP_PH_SPLIT:%.*]]
; CHECK: loop.ph.split:
; CHECK-NEXT: [[SMAX:%.*]] = call i64 @llvm.smax.i64(i64 [[N:%.*]], i64 0)
; CHECK-NEXT: [[NEW_BOUND:%.*]] = call i64 @llvm.smin.i64(i64 [[SMAX]], i64 10)
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[LOOP_PH_SPLIT]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], 10
; CHECK-NEXT: br i1 true, label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: if.else:
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp sgt i64 [[INC]], [[NEW_BOUND]]
; CHECK-NEXT: br i1 [[COND]], label [[LOOP_PH_SPLIT_SPLIT:%.*]], label [[LOOP]]
; CHECK: loop.ph.split.split:
; CHECK-NEXT: [[IV_LCSSA:%.*]] = phi i64 [ [[INC]], [[FOR_INC]] ]
; CHECK-NEXT: [[TMP0:%.*]] = icmp ne i64 [[IV_LCSSA]], [[N]]
; CHECK-NEXT: br i1 [[TMP0]], label [[LOOP_SPLIT_PREHEADER:%.*]], label [[EXIT:%.*]]
; CHECK: loop.split.preheader:
; CHECK-NEXT: br label [[LOOP_SPLIT:%.*]]
; CHECK: loop.split:
; CHECK-NEXT: [[IV_SPLIT:%.*]] = phi i64 [ [[INC_SPLIT:%.*]], [[FOR_INC_SPLIT:%.*]] ], [ [[IV_LCSSA]], [[LOOP_SPLIT_PREHEADER]] ]
; CHECK-NEXT: [[CMP_SPLIT:%.*]] = icmp ult i64 [[IV_SPLIT]], 10
; CHECK-NEXT: br i1 false, label [[IF_THEN_SPLIT:%.*]], label [[IF_ELSE_SPLIT:%.*]]
; CHECK: if.else.split:
; CHECK-NEXT: br label [[FOR_INC_SPLIT]]
; CHECK: if.then.split:
; CHECK-NEXT: [[SRC_ARRAYIDX_SPLIT:%.*]] = getelementptr inbounds i64, i64* [[SRC]], i64 [[IV_SPLIT]]
; CHECK-NEXT: [[VAL_SPLIT:%.*]] = load i64, i64* [[SRC_ARRAYIDX_SPLIT]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX_SPLIT:%.*]] = getelementptr inbounds i64, i64* [[DST]], i64 [[IV_SPLIT]]
; CHECK-NEXT: store i64 [[VAL_SPLIT]], i64* [[DST_ARRAYIDX_SPLIT]], align 4
; CHECK-NEXT: br label [[FOR_INC_SPLIT]]
; CHECK: for.inc.split:
; CHECK-NEXT: [[INC_SPLIT]] = add nuw nsw i64 [[IV_SPLIT]], 1
; CHECK-NEXT: [[COND_SPLIT:%.*]] = icmp sgt i64 [[INC_SPLIT]], [[N]]
; CHECK-NEXT: br i1 [[COND_SPLIT]], label [[EXIT_LOOPEXIT:%.*]], label [[LOOP_SPLIT]]
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %inc, %for.inc ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, 10
br i1 %cmp, label %if.then, label %if.else
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.inc
if.else:
br label %for.inc
for.inc:
%inc = add nuw nsw i64 %iv, 1
%cond = icmp sgt i64 %inc, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @variable_split_loop_bound_and_exit_cond_inc_with_eq(i64 %a, i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @variable_split_loop_bound_and_exit_cond_inc_with_eq(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[LOOP_PH:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], [[A:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: if.else:
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i64 [[INC]], [[N:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %inc, %for.inc ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, %a
br i1 %cmp, label %if.then, label %if.else
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.inc
if.else:
br label %for.inc
for.inc:
%inc = add nuw nsw i64 %iv, 1
%cond = icmp eq i64 %inc, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @constant_split_loop_bound_and_exit_cond_inc_with_eq(i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @constant_split_loop_bound_and_exit_cond_inc_with_eq(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP_PH_SPLIT:%.*]]
; CHECK: loop.ph.split:
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[N:%.*]], -1
; CHECK-NEXT: [[NEW_BOUND:%.*]] = call i64 @llvm.umin.i64(i64 [[TMP0]], i64 10)
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[LOOP_PH_SPLIT]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], 10
; CHECK-NEXT: br i1 true, label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: if.else:
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i64 [[INC]], [[NEW_BOUND]]
; CHECK-NEXT: br i1 [[COND]], label [[LOOP_PH_SPLIT_SPLIT:%.*]], label [[LOOP]]
; CHECK: loop.ph.split.split:
; CHECK-NEXT: [[IV_LCSSA:%.*]] = phi i64 [ [[INC]], [[FOR_INC]] ]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ne i64 [[IV_LCSSA]], [[N]]
; CHECK-NEXT: br i1 [[TMP1]], label [[LOOP_SPLIT_PREHEADER:%.*]], label [[EXIT:%.*]]
; CHECK: loop.split.preheader:
; CHECK-NEXT: br label [[LOOP_SPLIT:%.*]]
; CHECK: loop.split:
; CHECK-NEXT: [[IV_SPLIT:%.*]] = phi i64 [ [[INC_SPLIT:%.*]], [[FOR_INC_SPLIT:%.*]] ], [ [[IV_LCSSA]], [[LOOP_SPLIT_PREHEADER]] ]
; CHECK-NEXT: [[CMP_SPLIT:%.*]] = icmp ult i64 [[IV_SPLIT]], 10
; CHECK-NEXT: br i1 false, label [[IF_THEN_SPLIT:%.*]], label [[IF_ELSE_SPLIT:%.*]]
; CHECK: if.else.split:
; CHECK-NEXT: br label [[FOR_INC_SPLIT]]
; CHECK: if.then.split:
; CHECK-NEXT: [[SRC_ARRAYIDX_SPLIT:%.*]] = getelementptr inbounds i64, i64* [[SRC]], i64 [[IV_SPLIT]]
; CHECK-NEXT: [[VAL_SPLIT:%.*]] = load i64, i64* [[SRC_ARRAYIDX_SPLIT]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX_SPLIT:%.*]] = getelementptr inbounds i64, i64* [[DST]], i64 [[IV_SPLIT]]
; CHECK-NEXT: store i64 [[VAL_SPLIT]], i64* [[DST_ARRAYIDX_SPLIT]], align 4
; CHECK-NEXT: br label [[FOR_INC_SPLIT]]
; CHECK: for.inc.split:
; CHECK-NEXT: [[INC_SPLIT]] = add nuw nsw i64 [[IV_SPLIT]], 1
; CHECK-NEXT: [[COND_SPLIT:%.*]] = icmp eq i64 [[INC_SPLIT]], [[N]]
; CHECK-NEXT: br i1 [[COND_SPLIT]], label [[EXIT_LOOPEXIT:%.*]], label [[LOOP_SPLIT]]
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %inc, %for.inc ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, 10
br i1 %cmp, label %if.then, label %if.else
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.inc
if.else:
br label %for.inc
for.inc:
%inc = add nuw nsw i64 %iv, 1
%cond = icmp eq i64 %inc, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @variable_split_loop_bound_and_exit_cond_inc_with_sge(i64 %a, i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @variable_split_loop_bound_and_exit_cond_inc_with_sge(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[LOOP_PH:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], [[A:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: if.else:
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp sge i64 [[INC]], [[N:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %inc, %for.inc ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, %a
br i1 %cmp, label %if.then, label %if.else
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.inc
if.else:
br label %for.inc
for.inc:
%inc = add nuw nsw i64 %iv, 1
%cond = icmp sge i64 %inc, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @constant_split_loop_bound_and_exit_cond_inc_with_sge(i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @constant_split_loop_bound_and_exit_cond_inc_with_sge(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP_PH_SPLIT:%.*]]
; CHECK: loop.ph.split:
; CHECK-NEXT: [[SMAX:%.*]] = call i64 @llvm.smax.i64(i64 [[N:%.*]], i64 1)
; CHECK-NEXT: [[TMP0:%.*]] = add nsw i64 [[SMAX]], -1
; CHECK-NEXT: [[NEW_BOUND:%.*]] = call i64 @llvm.smin.i64(i64 [[TMP0]], i64 10)
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[LOOP_PH_SPLIT]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], 10
; CHECK-NEXT: br i1 true, label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: if.else:
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp sge i64 [[INC]], [[NEW_BOUND]]
; CHECK-NEXT: br i1 [[COND]], label [[LOOP_PH_SPLIT_SPLIT:%.*]], label [[LOOP]]
; CHECK: loop.ph.split.split:
; CHECK-NEXT: [[IV_LCSSA:%.*]] = phi i64 [ [[INC]], [[FOR_INC]] ]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ne i64 [[IV_LCSSA]], [[N]]
; CHECK-NEXT: br i1 [[TMP1]], label [[LOOP_SPLIT_PREHEADER:%.*]], label [[EXIT:%.*]]
; CHECK: loop.split.preheader:
; CHECK-NEXT: br label [[LOOP_SPLIT:%.*]]
; CHECK: loop.split:
; CHECK-NEXT: [[IV_SPLIT:%.*]] = phi i64 [ [[INC_SPLIT:%.*]], [[FOR_INC_SPLIT:%.*]] ], [ [[IV_LCSSA]], [[LOOP_SPLIT_PREHEADER]] ]
; CHECK-NEXT: [[CMP_SPLIT:%.*]] = icmp ult i64 [[IV_SPLIT]], 10
; CHECK-NEXT: br i1 false, label [[IF_THEN_SPLIT:%.*]], label [[IF_ELSE_SPLIT:%.*]]
; CHECK: if.else.split:
; CHECK-NEXT: br label [[FOR_INC_SPLIT]]
; CHECK: if.then.split:
; CHECK-NEXT: [[SRC_ARRAYIDX_SPLIT:%.*]] = getelementptr inbounds i64, i64* [[SRC]], i64 [[IV_SPLIT]]
; CHECK-NEXT: [[VAL_SPLIT:%.*]] = load i64, i64* [[SRC_ARRAYIDX_SPLIT]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX_SPLIT:%.*]] = getelementptr inbounds i64, i64* [[DST]], i64 [[IV_SPLIT]]
; CHECK-NEXT: store i64 [[VAL_SPLIT]], i64* [[DST_ARRAYIDX_SPLIT]], align 4
; CHECK-NEXT: br label [[FOR_INC_SPLIT]]
; CHECK: for.inc.split:
; CHECK-NEXT: [[INC_SPLIT]] = add nuw nsw i64 [[IV_SPLIT]], 1
; CHECK-NEXT: [[COND_SPLIT:%.*]] = icmp sge i64 [[INC_SPLIT]], [[N]]
; CHECK-NEXT: br i1 [[COND_SPLIT]], label [[EXIT_LOOPEXIT:%.*]], label [[LOOP_SPLIT]]
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %inc, %for.inc ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, 10
br i1 %cmp, label %if.then, label %if.else
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.inc
if.else:
br label %for.inc
for.inc:
%inc = add nuw nsw i64 %iv, 1
%cond = icmp sge i64 %inc, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @variable_split_loop_bound_and_exit_cond_inc_with_step_is_not_one(i64 %a, i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @variable_split_loop_bound_and_exit_cond_inc_with_step_is_not_one(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[LOOP_PH:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], [[A:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: if.else:
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[IV]], 2
; CHECK-NEXT: [[COND:%.*]] = icmp sgt i64 [[INC]], [[N:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %inc, %for.inc ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, %a
br i1 %cmp, label %if.then, label %if.else
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.inc
if.else:
br label %for.inc
for.inc:
%inc = add nuw nsw i64 %iv, 2
%cond = icmp sgt i64 %inc, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @constant_split_loop_bound_and_exit_cond_inc_with_step_is_not_one(i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @constant_split_loop_bound_and_exit_cond_inc_with_step_is_not_one(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP_PH_SPLIT:%.*]]
; CHECK: loop.ph.split:
; CHECK-NEXT: [[SMAX:%.*]] = call i64 @llvm.smax.i64(i64 [[N:%.*]], i64 1)
; CHECK-NEXT: [[TMP0:%.*]] = lshr i64 [[SMAX]], 1
; CHECK-NEXT: [[NEW_BOUND:%.*]] = call i64 @llvm.smin.i64(i64 [[TMP0]], i64 10)
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[LOOP_PH_SPLIT]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], 10
; CHECK-NEXT: br i1 true, label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: if.else:
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[IV]], 2
; CHECK-NEXT: [[COND:%.*]] = icmp sgt i64 [[INC]], [[NEW_BOUND]]
; CHECK-NEXT: br i1 [[COND]], label [[LOOP_PH_SPLIT_SPLIT:%.*]], label [[LOOP]]
; CHECK: loop.ph.split.split:
; CHECK-NEXT: [[IV_LCSSA:%.*]] = phi i64 [ [[INC]], [[FOR_INC]] ]
; CHECK-NEXT: [[TMP1:%.*]] = icmp ne i64 [[IV_LCSSA]], [[N]]
; CHECK-NEXT: br i1 [[TMP1]], label [[LOOP_SPLIT_PREHEADER:%.*]], label [[EXIT:%.*]]
; CHECK: loop.split.preheader:
; CHECK-NEXT: br label [[LOOP_SPLIT:%.*]]
; CHECK: loop.split:
; CHECK-NEXT: [[IV_SPLIT:%.*]] = phi i64 [ [[INC_SPLIT:%.*]], [[FOR_INC_SPLIT:%.*]] ], [ [[IV_LCSSA]], [[LOOP_SPLIT_PREHEADER]] ]
; CHECK-NEXT: [[CMP_SPLIT:%.*]] = icmp ult i64 [[IV_SPLIT]], 10
; CHECK-NEXT: br i1 false, label [[IF_THEN_SPLIT:%.*]], label [[IF_ELSE_SPLIT:%.*]]
; CHECK: if.else.split:
; CHECK-NEXT: br label [[FOR_INC_SPLIT]]
; CHECK: if.then.split:
; CHECK-NEXT: [[SRC_ARRAYIDX_SPLIT:%.*]] = getelementptr inbounds i64, i64* [[SRC]], i64 [[IV_SPLIT]]
; CHECK-NEXT: [[VAL_SPLIT:%.*]] = load i64, i64* [[SRC_ARRAYIDX_SPLIT]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX_SPLIT:%.*]] = getelementptr inbounds i64, i64* [[DST]], i64 [[IV_SPLIT]]
; CHECK-NEXT: store i64 [[VAL_SPLIT]], i64* [[DST_ARRAYIDX_SPLIT]], align 4
; CHECK-NEXT: br label [[FOR_INC_SPLIT]]
; CHECK: for.inc.split:
; CHECK-NEXT: [[INC_SPLIT]] = add nuw nsw i64 [[IV_SPLIT]], 2
; CHECK-NEXT: [[COND_SPLIT:%.*]] = icmp sgt i64 [[INC_SPLIT]], [[N]]
; CHECK-NEXT: br i1 [[COND_SPLIT]], label [[EXIT_LOOPEXIT:%.*]], label [[LOOP_SPLIT]]
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %inc, %for.inc ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, 10
br i1 %cmp, label %if.then, label %if.else
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.inc
if.else:
br label %for.inc
for.inc:
%inc = add nuw nsw i64 %iv, 2
%cond = icmp sgt i64 %inc, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @variable_split_loop_bound_and_exit_cond_inc_with_ne(i64 %a, i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @variable_split_loop_bound_and_exit_cond_inc_with_ne(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[LOOP_PH:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], [[A:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[FOR_INC]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp ne i64 [[INC]], [[N:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %inc, %for.inc ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, %a
br i1 %cmp, label %if.then, label %for.inc
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.inc
for.inc:
%inc = add nuw nsw i64 %iv, 1
%cond = icmp ne i64 %inc, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @constant_split_loop_bound_and_exit_cond_inc_with_ne(i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @constant_split_loop_bound_and_exit_cond_inc_with_ne(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ 0, [[LOOP_PH:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], 10
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[FOR_INC]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp ne i64 [[INC]], [[N:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %inc, %for.inc ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, 10
br i1 %cmp, label %if.then, label %for.inc
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.inc
for.inc:
%inc = add nuw nsw i64 %iv, 1
%cond = icmp ne i64 %inc, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @varialbe_split_loop_bound_and_exit_cond_dec_with_slt(i64 %a, i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @varialbe_split_loop_bound_and_exit_cond_dec_with_slt(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[DEC:%.*]], [[FOR_DEC:%.*]] ], [ 0, [[LOOP_PH:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], [[A:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[FOR_DEC]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_DEC]]
; CHECK: for.dec:
; CHECK-NEXT: [[DEC]] = sub nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp slt i64 [[DEC]], [[N:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %dec, %for.dec ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, %a
br i1 %cmp, label %if.then, label %for.dec
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.dec
for.dec:
%dec = sub nuw nsw i64 %iv, 1
%cond = icmp slt i64 %dec, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @constant_split_loop_bound_and_exit_cond_dec_with_slt(i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @constant_split_loop_bound_and_exit_cond_dec_with_slt(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[DEC:%.*]], [[FOR_DEC:%.*]] ], [ 0, [[LOOP_PH:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], 10
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[FOR_DEC]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_DEC]]
; CHECK: for.dec:
; CHECK-NEXT: [[DEC]] = sub nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp slt i64 [[DEC]], [[N:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %dec, %for.dec ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, 10
br i1 %cmp, label %if.then, label %for.dec
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.dec
for.dec:
%dec = sub nuw nsw i64 %iv, 1
%cond = icmp slt i64 %dec, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @variable_split_loop_bound_and_exit_cond_dec_with_sle(i64 %a, i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @variable_split_loop_bound_and_exit_cond_dec_with_sle(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[DEC:%.*]], [[FOR_DEC:%.*]] ], [ 0, [[LOOP_PH:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], [[A:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[FOR_DEC]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_DEC]]
; CHECK: for.dec:
; CHECK-NEXT: [[DEC]] = sub nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp sle i64 [[DEC]], [[N:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %dec, %for.dec ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, %a
br i1 %cmp, label %if.then, label %for.dec
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.dec
for.dec:
%dec = sub nuw nsw i64 %iv, 1
%cond = icmp sle i64 %dec, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @constant_split_loop_bound_and_exit_cond_dec_with_sle(i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @constant_split_loop_bound_and_exit_cond_dec_with_sle(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[DEC:%.*]], [[FOR_DEC:%.*]] ], [ 0, [[LOOP_PH:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], 10
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[FOR_DEC]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_DEC]]
; CHECK: for.dec:
; CHECK-NEXT: [[DEC]] = sub nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp sle i64 [[DEC]], [[N:%.*]]
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%iv = phi i64 [ %dec, %for.dec ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, 10
br i1 %cmp, label %if.then, label %for.dec
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.dec
for.dec:
%dec = sub nuw nsw i64 %iv, 1
%cond = icmp sle i64 %dec, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
; LoopBoundSplit pass should ignore phi which is not scevable phi.
define void @constant_split_loop_bound_and_exit_cond_inc_with_sgt_and_is_not_scevable_phi(i64* noalias %src, i64* noalias %dst, i64 %n) {
; CHECK-LABEL: @constant_split_loop_bound_and_exit_cond_inc_with_sgt_and_is_not_scevable_phi(
; CHECK-NEXT: loop.ph:
; CHECK-NEXT: br label [[LOOP_PH_SPLIT:%.*]]
; CHECK: loop.ph.split:
; CHECK-NEXT: [[SMAX:%.*]] = call i64 @llvm.smax.i64(i64 [[N:%.*]], i64 0)
; CHECK-NEXT: [[NEW_BOUND:%.*]] = call i64 @llvm.smin.i64(i64 [[SMAX]], i64 10)
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IS_NOT_SCEVABLE_PHI:%.*]] = phi double [ 1.000000e+00, [[FOR_INC:%.*]] ], [ 2.000000e+00, [[LOOP_PH_SPLIT]] ]
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC]] ], [ 0, [[LOOP_PH_SPLIT]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV]], 10
; CHECK-NEXT: br i1 true, label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[SRC_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[SRC:%.*]], i64 [[IV]]
; CHECK-NEXT: [[VAL:%.*]] = load i64, i64* [[SRC_ARRAYIDX]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX:%.*]] = getelementptr inbounds i64, i64* [[DST:%.*]], i64 [[IV]]
; CHECK-NEXT: store i64 [[VAL]], i64* [[DST_ARRAYIDX]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: if.else:
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp sgt i64 [[INC]], [[NEW_BOUND]]
; CHECK-NEXT: br i1 [[COND]], label [[LOOP_PH_SPLIT_SPLIT:%.*]], label [[LOOP]]
; CHECK: loop.ph.split.split:
; CHECK-NEXT: [[IS_NOT_SCEVABLE_PHI_LCSSA:%.*]] = phi double [ 1.000000e+00, [[FOR_INC]] ]
; CHECK-NEXT: [[IV_LCSSA:%.*]] = phi i64 [ [[INC]], [[FOR_INC]] ]
; CHECK-NEXT: [[TMP0:%.*]] = icmp ne i64 [[IV_LCSSA]], [[N]]
; CHECK-NEXT: br i1 [[TMP0]], label [[LOOP_SPLIT_PREHEADER:%.*]], label [[EXIT:%.*]]
; CHECK: loop.split.preheader:
; CHECK-NEXT: br label [[LOOP_SPLIT:%.*]]
; CHECK: loop.split:
; CHECK-NEXT: [[IS_NOT_SCEVABLE_PHI_SPLIT:%.*]] = phi double [ 1.000000e+00, [[FOR_INC_SPLIT:%.*]] ], [ [[IS_NOT_SCEVABLE_PHI_LCSSA]], [[LOOP_SPLIT_PREHEADER]] ]
; CHECK-NEXT: [[IV_SPLIT:%.*]] = phi i64 [ [[INC_SPLIT:%.*]], [[FOR_INC_SPLIT]] ], [ [[IV_LCSSA]], [[LOOP_SPLIT_PREHEADER]] ]
; CHECK-NEXT: [[CMP_SPLIT:%.*]] = icmp ult i64 [[IV_SPLIT]], 10
; CHECK-NEXT: br i1 false, label [[IF_THEN_SPLIT:%.*]], label [[IF_ELSE_SPLIT:%.*]]
; CHECK: if.else.split:
; CHECK-NEXT: br label [[FOR_INC_SPLIT]]
; CHECK: if.then.split:
; CHECK-NEXT: [[SRC_ARRAYIDX_SPLIT:%.*]] = getelementptr inbounds i64, i64* [[SRC]], i64 [[IV_SPLIT]]
; CHECK-NEXT: [[VAL_SPLIT:%.*]] = load i64, i64* [[SRC_ARRAYIDX_SPLIT]], align 4
; CHECK-NEXT: [[DST_ARRAYIDX_SPLIT:%.*]] = getelementptr inbounds i64, i64* [[DST]], i64 [[IV_SPLIT]]
; CHECK-NEXT: store i64 [[VAL_SPLIT]], i64* [[DST_ARRAYIDX_SPLIT]], align 4
; CHECK-NEXT: br label [[FOR_INC_SPLIT]]
; CHECK: for.inc.split:
; CHECK-NEXT: [[INC_SPLIT]] = add nuw nsw i64 [[IV_SPLIT]], 1
; CHECK-NEXT: [[COND_SPLIT:%.*]] = icmp sgt i64 [[INC_SPLIT]], [[N]]
; CHECK-NEXT: br i1 [[COND_SPLIT]], label [[EXIT_LOOPEXIT:%.*]], label [[LOOP_SPLIT]]
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
loop.ph:
br label %loop
loop:
%is_not_scevable_phi = phi double [ 1.0, %for.inc ], [ 2.0, %loop.ph ]
%iv = phi i64 [ %inc, %for.inc ], [ 0, %loop.ph ]
%cmp = icmp ult i64 %iv, 10
br i1 %cmp, label %if.then, label %if.else
if.then:
%src.arrayidx = getelementptr inbounds i64, i64* %src, i64 %iv
%val = load i64, i64* %src.arrayidx
%dst.arrayidx = getelementptr inbounds i64, i64* %dst, i64 %iv
store i64 %val, i64* %dst.arrayidx
br label %for.inc
if.else:
br label %for.inc
for.inc:
%inc = add nuw nsw i64 %iv, 1
%cond = icmp sgt i64 %inc, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
declare i64 @llvm.umax.i64(i64, i64)