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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -p indvars -S %s | FileCheck %s
declare void @foo()
define void @narrow_iv_precondition_order_1(ptr %start, i32 %base, i8 %n) {
; CHECK-LABEL: define void @narrow_iv_precondition_order_1(
; CHECK-SAME: ptr [[START:%.*]], i32 [[BASE:%.*]], i8 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[PRE_0:%.*]] = icmp sgt i32 [[BASE]], 0
; CHECK-NEXT: br i1 [[PRE_0]], label %[[EXIT:.*]], label %[[PH:.*]]
; CHECK: [[PH]]:
; CHECK-NEXT: [[N_EXT:%.*]] = zext i8 [[N]] to i32
; CHECK-NEXT: [[PRE_1:%.*]] = icmp sgt i32 [[BASE]], [[N_EXT]]
; CHECK-NEXT: br i1 [[PRE_1]], label %[[LOOP_PREHEADER:.*]], label %[[EXIT]]
; CHECK: [[LOOP_PREHEADER]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi ptr [ [[GEP:%.*]], %[[LOOP]] ], [ [[START]], %[[LOOP_PREHEADER]] ]
; CHECK-NEXT: call void @foo()
; CHECK-NEXT: [[END:%.*]] = load i8, ptr [[IV]], align 1
; CHECK-NEXT: [[END_EXT:%.*]] = zext i8 [[END]] to i32
; CHECK-NEXT: [[GEP]] = getelementptr inbounds i8, ptr [[IV]], i64 1
; CHECK-NEXT: [[EC:%.*]] = icmp sgt i32 [[BASE]], [[END_EXT]]
; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT_LOOPEXIT:.*]]
; CHECK: [[EXIT_LOOPEXIT]]:
; CHECK-NEXT: br label %[[EXIT]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: ret void
;
entry:
%pre.0 = icmp sgt i32 %base, 0
br i1 %pre.0, label %exit, label %ph
ph: ; preds = %entry
%n.ext = zext i8 %n to i32
%pre.1 = icmp sgt i32 %base, %n.ext
br i1 %pre.1, label %loop, label %exit
loop:
%iv = phi ptr [ %start, %ph ], [ %gep, %loop ]
call void @foo()
%end = load i8, ptr %iv, align 1
%end.ext = zext i8 %end to i32
%gep = getelementptr inbounds i8, ptr %iv, i64 1
%ec = icmp sgt i32 %base, %end.ext
br i1 %ec, label %loop, label %exit
exit:
ret void
}
define void @narrow_iv_precondition_order_2(ptr %start, i32 %base, i8 %n) {
; CHECK-LABEL: define void @narrow_iv_precondition_order_2(
; CHECK-SAME: ptr [[START:%.*]], i32 [[BASE:%.*]], i8 [[N:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[N_EXT:%.*]] = zext i8 [[N]] to i32
; CHECK-NEXT: [[PRE_1:%.*]] = icmp sgt i32 [[BASE]], [[N_EXT]]
; CHECK-NEXT: br i1 [[PRE_1]], label %[[EXIT:.*]], label %[[PH:.*]]
; CHECK: [[PH]]:
; CHECK-NEXT: [[PRE_0:%.*]] = icmp sgt i32 [[BASE]], 0
; CHECK-NEXT: br i1 [[PRE_0]], label %[[LOOP_PREHEADER:.*]], label %[[EXIT]]
; CHECK: [[LOOP_PREHEADER]]:
; CHECK-NEXT: [[TMP0:%.*]] = trunc i32 [[BASE]] to i8
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi ptr [ [[GEP:%.*]], %[[LOOP]] ], [ [[START]], %[[LOOP_PREHEADER]] ]
; CHECK-NEXT: call void @foo()
; CHECK-NEXT: [[END:%.*]] = load i8, ptr [[IV]], align 1
; CHECK-NEXT: [[GEP]] = getelementptr inbounds i8, ptr [[IV]], i64 1
; CHECK-NEXT: [[EC:%.*]] = icmp ugt i8 [[TMP0]], [[END]]
; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT_LOOPEXIT:.*]]
; CHECK: [[EXIT_LOOPEXIT]]:
; CHECK-NEXT: br label %[[EXIT]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: ret void
;
entry:
%n.ext = zext i8 %n to i32
%pre.1 = icmp sgt i32 %base, %n.ext
br i1 %pre.1, label %exit, label %ph
ph: ; preds = %entry
%pre.0 = icmp sgt i32 %base, 0
br i1 %pre.0, label %loop, label %exit
loop:
%iv = phi ptr [ %start, %ph ], [ %gep, %loop ]
call void @foo()
%end = load i8, ptr %iv, align 1
%end.ext = zext i8 %end to i32
%gep = getelementptr inbounds i8, ptr %iv, i64 1
%ec = icmp sgt i32 %base, %end.ext
br i1 %ec, label %loop, label %exit
exit:
ret void
}
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