; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
; RUN: opt -verify-loop-info -irce-print-changed-loops -passes=irce -S < %s 2>&1 | FileCheck %s
; RUN: opt -verify-loop-info -irce-print-changed-loops -passes='require<branch-prob>,irce' -S < %s 2>&1 | FileCheck %s
; CHECK: irce: in function test_01: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting>
; CHECK: irce: in function test_02: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting>
; Iterate from 0 to SINT_MAX, check that the post-loop is generated.
define void @test_01(ptr %arr, ptr %a_len_ptr) {
; CHECK-LABEL: define void @test_01
; CHECK-SAME: (ptr [[ARR:%.*]], ptr [[A_LEN_PTR:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[EXIT_MAINLOOP_AT:%.*]] = load i32, ptr [[A_LEN_PTR]], align 4, !range [[RNG0:![0-9]+]]
; CHECK-NEXT: [[TMP0:%.*]] = icmp slt i32 0, [[EXIT_MAINLOOP_AT]]
; CHECK-NEXT: br i1 [[TMP0]], label [[LOOP_PREHEADER:%.*]], label [[MAIN_PSEUDO_EXIT:%.*]]
; CHECK: loop.preheader:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IDX:%.*]] = phi i32 [ [[IDX_NEXT:%.*]], [[IN_BOUNDS:%.*]] ], [ 0, [[LOOP_PREHEADER]] ]
; CHECK-NEXT: [[IDX_NEXT]] = add nsw i32 [[IDX]], 1
; CHECK-NEXT: [[ABC:%.*]] = icmp slt i32 [[IDX]], [[EXIT_MAINLOOP_AT]]
; CHECK-NEXT: br i1 true, label [[IN_BOUNDS]], label [[OUT_OF_BOUNDS_LOOPEXIT1:%.*]]
; CHECK: in.bounds:
; CHECK-NEXT: [[ADDR:%.*]] = getelementptr i32, ptr [[ARR]], i32 [[IDX]]
; CHECK-NEXT: store i32 0, ptr [[ADDR]], align 4
; CHECK-NEXT: [[NEXT:%.*]] = icmp slt i32 [[IDX_NEXT]], 2147483647
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[IDX_NEXT]], [[EXIT_MAINLOOP_AT]]
; CHECK-NEXT: br i1 [[TMP1]], label [[LOOP]], label [[MAIN_EXIT_SELECTOR:%.*]]
; CHECK: main.exit.selector:
; CHECK-NEXT: [[IDX_NEXT_LCSSA:%.*]] = phi i32 [ [[IDX_NEXT]], [[IN_BOUNDS]] ]
; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[IDX_NEXT_LCSSA]], 2147483647
; CHECK-NEXT: br i1 [[TMP2]], label [[MAIN_PSEUDO_EXIT]], label [[EXIT:%.*]]
; CHECK: main.pseudo.exit:
; CHECK-NEXT: [[IDX_COPY:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IDX_NEXT_LCSSA]], [[MAIN_EXIT_SELECTOR]] ]
; CHECK-NEXT: [[INDVAR_END:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[IDX_NEXT_LCSSA]], [[MAIN_EXIT_SELECTOR]] ]
; CHECK-NEXT: br label [[POSTLOOP:%.*]]
; CHECK: out.of.bounds.loopexit:
; CHECK-NEXT: br label [[OUT_OF_BOUNDS:%.*]]
; CHECK: out.of.bounds.loopexit1:
; CHECK-NEXT: br label [[OUT_OF_BOUNDS]]
; CHECK: out.of.bounds:
; CHECK-NEXT: ret void
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
; CHECK: postloop:
; CHECK-NEXT: br label [[LOOP_POSTLOOP:%.*]]
; CHECK: loop.postloop:
; CHECK-NEXT: [[IDX_POSTLOOP:%.*]] = phi i32 [ [[IDX_COPY]], [[POSTLOOP]] ], [ [[IDX_NEXT_POSTLOOP:%.*]], [[IN_BOUNDS_POSTLOOP:%.*]] ]
; CHECK-NEXT: [[IDX_NEXT_POSTLOOP]] = add i32 [[IDX_POSTLOOP]], 1
; CHECK-NEXT: [[ABC_POSTLOOP:%.*]] = icmp slt i32 [[IDX_POSTLOOP]], [[EXIT_MAINLOOP_AT]]
; CHECK-NEXT: br i1 [[ABC_POSTLOOP]], label [[IN_BOUNDS_POSTLOOP]], label [[OUT_OF_BOUNDS_LOOPEXIT:%.*]]
; CHECK: in.bounds.postloop:
; CHECK-NEXT: [[ADDR_POSTLOOP:%.*]] = getelementptr i32, ptr [[ARR]], i32 [[IDX_POSTLOOP]]
; CHECK-NEXT: store i32 0, ptr [[ADDR_POSTLOOP]], align 4
; CHECK-NEXT: [[NEXT_POSTLOOP:%.*]] = icmp slt i32 [[IDX_NEXT_POSTLOOP]], 2147483647
; CHECK-NEXT: br i1 [[NEXT_POSTLOOP]], label [[LOOP_POSTLOOP]], label [[EXIT_LOOPEXIT:%.*]], !llvm.loop [[LOOP1:![0-9]+]], !loop_constrainer.loop.clone [[META6:![0-9]+]]
;
entry:
%len = load i32, ptr %a_len_ptr, !range !0
br label %loop
loop:
%idx = phi i32 [ 0, %entry ], [ %idx.next, %in.bounds ]
%idx.next = add i32 %idx, 1
%abc = icmp slt i32 %idx, %len
br i1 %abc, label %in.bounds, label %out.of.bounds
in.bounds:
%addr = getelementptr i32, ptr %arr, i32 %idx
store i32 0, ptr %addr
%next = icmp slt i32 %idx.next, 2147483647
br i1 %next, label %loop, label %exit
out.of.bounds:
ret void
exit:
ret void
}
; Iterate from SINT_MAX to 0, check that the pre-loop is generated.
define void @test_02(ptr %arr, ptr %a_len_ptr) {
; CHECK-LABEL: define void @test_02
; CHECK-SAME: (ptr [[ARR:%.*]], ptr [[A_LEN_PTR:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[LEN:%.*]] = load i32, ptr [[A_LEN_PTR]], align 4, !range [[RNG0]]
; CHECK-NEXT: br i1 true, label [[LOOP_PRELOOP_PREHEADER:%.*]], label [[PRELOOP_PSEUDO_EXIT:%.*]]
; CHECK: loop.preloop.preheader:
; CHECK-NEXT: br label [[LOOP_PRELOOP:%.*]]
; CHECK: mainloop:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IDX:%.*]] = phi i32 [ [[IDX_PRELOOP_COPY:%.*]], [[MAINLOOP:%.*]] ], [ [[IDX_NEXT:%.*]], [[IN_BOUNDS:%.*]] ]
; CHECK-NEXT: [[IDX_NEXT]] = add nsw i32 [[IDX]], -1
; CHECK-NEXT: [[ABC:%.*]] = icmp slt i32 [[IDX]], [[LEN]]
; CHECK-NEXT: br i1 true, label [[IN_BOUNDS]], label [[OUT_OF_BOUNDS_LOOPEXIT1:%.*]]
; CHECK: in.bounds:
; CHECK-NEXT: [[ADDR:%.*]] = getelementptr i32, ptr [[ARR]], i32 [[IDX]]
; CHECK-NEXT: store i32 0, ptr [[ADDR]], align 4
; CHECK-NEXT: [[NEXT:%.*]] = icmp sgt i32 [[IDX_NEXT]], -1
; CHECK-NEXT: br i1 [[NEXT]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK: out.of.bounds.loopexit:
; CHECK-NEXT: br label [[OUT_OF_BOUNDS:%.*]]
; CHECK: out.of.bounds.loopexit1:
; CHECK-NEXT: br label [[OUT_OF_BOUNDS]]
; CHECK: out.of.bounds:
; CHECK-NEXT: ret void
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret void
; CHECK: loop.preloop:
; CHECK-NEXT: [[IDX_PRELOOP:%.*]] = phi i32 [ [[IDX_NEXT_PRELOOP:%.*]], [[IN_BOUNDS_PRELOOP:%.*]] ], [ 2147483647, [[LOOP_PRELOOP_PREHEADER]] ]
; CHECK-NEXT: [[IDX_NEXT_PRELOOP]] = add i32 [[IDX_PRELOOP]], -1
; CHECK-NEXT: [[ABC_PRELOOP:%.*]] = icmp slt i32 [[IDX_PRELOOP]], [[LEN]]
; CHECK-NEXT: br i1 [[ABC_PRELOOP]], label [[IN_BOUNDS_PRELOOP]], label [[OUT_OF_BOUNDS_LOOPEXIT:%.*]]
; CHECK: in.bounds.preloop:
; CHECK-NEXT: [[ADDR_PRELOOP:%.*]] = getelementptr i32, ptr [[ARR]], i32 [[IDX_PRELOOP]]
; CHECK-NEXT: store i32 0, ptr [[ADDR_PRELOOP]], align 4
; CHECK-NEXT: [[NEXT_PRELOOP:%.*]] = icmp sgt i32 [[IDX_NEXT_PRELOOP]], -1
; CHECK-NEXT: [[TMP0:%.*]] = icmp sgt i32 [[IDX_NEXT_PRELOOP]], -1
; CHECK-NEXT: br i1 [[TMP0]], label [[LOOP_PRELOOP]], label [[PRELOOP_EXIT_SELECTOR:%.*]], !llvm.loop [[LOOP7:![0-9]+]], !loop_constrainer.loop.clone [[META6]]
; CHECK: preloop.exit.selector:
; CHECK-NEXT: [[IDX_NEXT_PRELOOP_LCSSA:%.*]] = phi i32 [ [[IDX_NEXT_PRELOOP]], [[IN_BOUNDS_PRELOOP]] ]
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[IDX_NEXT_PRELOOP_LCSSA]], -1
; CHECK-NEXT: br i1 [[TMP1]], label [[PRELOOP_PSEUDO_EXIT]], label [[EXIT]]
; CHECK: preloop.pseudo.exit:
; CHECK-NEXT: [[IDX_PRELOOP_COPY]] = phi i32 [ 2147483647, [[ENTRY:%.*]] ], [ [[IDX_NEXT_PRELOOP_LCSSA]], [[PRELOOP_EXIT_SELECTOR]] ]
; CHECK-NEXT: [[INDVAR_END:%.*]] = phi i32 [ 2147483647, [[ENTRY]] ], [ [[IDX_NEXT_PRELOOP_LCSSA]], [[PRELOOP_EXIT_SELECTOR]] ]
; CHECK-NEXT: br label [[MAINLOOP]]
;
entry:
%len = load i32, ptr %a_len_ptr, !range !0
br label %loop
loop:
%idx = phi i32 [ 2147483647, %entry ], [ %idx.next, %in.bounds ]
%idx.next = add i32 %idx, -1
%abc = icmp slt i32 %idx, %len
br i1 %abc, label %in.bounds, label %out.of.bounds
in.bounds:
%addr = getelementptr i32, ptr %arr, i32 %idx
store i32 0, ptr %addr
%next = icmp sgt i32 %idx.next, -1
br i1 %next, label %loop, label %exit
out.of.bounds:
ret void
exit:
ret void
}
!0 = !{i32 0, i32 50}
;.
; CHECK: [[RNG0]] = !{i32 0, i32 50}
; CHECK: [[LOOP1]] = distinct !{[[LOOP1]], [[META2:![0-9]+]], [[META3:![0-9]+]], [[META4:![0-9]+]], [[META5:![0-9]+]]}
; CHECK: [[META2]] = !{!"llvm.loop.unroll.disable"}
; CHECK: [[META3]] = !{!"llvm.loop.vectorize.enable", i1 false}
; CHECK: [[META4]] = !{!"llvm.loop.licm_versioning.disable"}
; CHECK: [[META5]] = !{!"llvm.loop.distribute.enable", i1 false}
; CHECK: [[META6]] = !{}
; CHECK: [[LOOP7]] = distinct !{[[LOOP7]], [[META2]], [[META3]], [[META4]], [[META5]]}
;.
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