187 lines
5.7 KiB
LLVM
187 lines
5.7 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -indvars -S < %s | FileCheck %s
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; RUN: opt -passes=indvars -S < %s | FileCheck %s
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; FIXME: In all cases, x is from [0; 1000) and we cannot prove that x + 1 > x.
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define void @test_sgt(i32 %x) {
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; CHECK-LABEL: @test_sgt(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[PRECONDITION:%.*]] = icmp ult i32 [[X:%.*]], 1000
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; CHECK-NEXT: br i1 [[PRECONDITION]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]]
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; CHECK: loop.preheader:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[IV_NEXT:%.*]], [[GUARDED:%.*]] ], [ [[X]], [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[TMP:%.*]] = add i32 [[IV]], 1
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; CHECK-NEXT: [[GUARD:%.*]] = icmp sgt i32 [[TMP]], [[IV]]
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; CHECK-NEXT: br i1 [[GUARD]], label [[GUARDED]], label [[FAIL:%.*]]
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; CHECK: guarded:
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], -1
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; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[IV]], 0
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; CHECK-NEXT: br i1 [[COND]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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; CHECK: fail:
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; CHECK-NEXT: unreachable
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;
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entry:
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%precondition = icmp ult i32 %x, 1000
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br i1 %precondition, label %loop, label %exit
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loop:
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%iv = phi i32 [%x, %entry], [%iv.next, %guarded]
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%tmp = add i32 %iv, 1
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%guard = icmp sgt i32 %tmp, %iv
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br i1 %guard, label %guarded, label %fail
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guarded:
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%iv.next = add i32 %iv, -1
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%cond = icmp eq i32 %iv, 0
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br i1 %cond, label %loop, label %exit
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exit:
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ret void
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fail:
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unreachable
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}
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define void @test_sge(i32 %x) {
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; CHECK-LABEL: @test_sge(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[PRECONDITION:%.*]] = icmp ult i32 [[X:%.*]], 1000
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; CHECK-NEXT: br i1 [[PRECONDITION]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]]
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; CHECK: loop.preheader:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[IV_NEXT:%.*]], [[GUARDED:%.*]] ], [ [[X]], [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[TMP:%.*]] = add i32 [[IV]], 1
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; CHECK-NEXT: [[GUARD:%.*]] = icmp sge i32 [[TMP]], [[IV]]
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; CHECK-NEXT: br i1 [[GUARD]], label [[GUARDED]], label [[FAIL:%.*]]
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; CHECK: guarded:
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], -1
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; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[IV]], 0
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; CHECK-NEXT: br i1 [[COND]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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; CHECK: fail:
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; CHECK-NEXT: unreachable
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;
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entry:
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%precondition = icmp ult i32 %x, 1000
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br i1 %precondition, label %loop, label %exit
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loop:
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%iv = phi i32 [%x, %entry], [%iv.next, %guarded]
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%tmp = add i32 %iv, 1
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%guard = icmp sge i32 %tmp, %iv
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br i1 %guard, label %guarded, label %fail
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guarded:
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%iv.next = add i32 %iv, -1
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%cond = icmp eq i32 %iv, 0
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br i1 %cond, label %loop, label %exit
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exit:
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ret void
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fail:
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unreachable
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}
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define void @test_ugt(i32 %x) {
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; CHECK-LABEL: @test_ugt(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[PRECONDITION:%.*]] = icmp ult i32 [[X:%.*]], 1000
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; CHECK-NEXT: br i1 [[PRECONDITION]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]]
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; CHECK: loop.preheader:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[IV_NEXT:%.*]], [[GUARDED:%.*]] ], [ [[X]], [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[TMP:%.*]] = add i32 [[IV]], 1
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; CHECK-NEXT: [[GUARD:%.*]] = icmp ugt i32 [[TMP]], [[IV]]
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; CHECK-NEXT: br i1 [[GUARD]], label [[GUARDED]], label [[FAIL:%.*]]
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; CHECK: guarded:
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], -1
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; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[IV]], 0
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; CHECK-NEXT: br i1 [[COND]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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; CHECK: fail:
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; CHECK-NEXT: unreachable
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;
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entry:
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%precondition = icmp ult i32 %x, 1000
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br i1 %precondition, label %loop, label %exit
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loop:
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%iv = phi i32 [%x, %entry], [%iv.next, %guarded]
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%tmp = add i32 %iv, 1
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%guard = icmp ugt i32 %tmp, %iv
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br i1 %guard, label %guarded, label %fail
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guarded:
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%iv.next = add i32 %iv, -1
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%cond = icmp eq i32 %iv, 0
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br i1 %cond, label %loop, label %exit
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exit:
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ret void
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fail:
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unreachable
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}
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define void @test_uge(i32 %x) {
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; CHECK-LABEL: @test_uge(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[PRECONDITION:%.*]] = icmp ult i32 [[X:%.*]], 1000
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; CHECK-NEXT: br i1 [[PRECONDITION]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]]
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; CHECK: loop.preheader:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[IV_NEXT:%.*]], [[GUARDED:%.*]] ], [ [[X]], [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[TMP:%.*]] = add i32 [[IV]], 1
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; CHECK-NEXT: [[GUARD:%.*]] = icmp uge i32 [[TMP]], [[IV]]
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; CHECK-NEXT: br i1 [[GUARD]], label [[GUARDED]], label [[FAIL:%.*]]
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; CHECK: guarded:
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], -1
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; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[IV]], 0
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; CHECK-NEXT: br i1 [[COND]], label [[LOOP]], label [[EXIT_LOOPEXIT:%.*]]
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; CHECK: exit.loopexit:
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; CHECK-NEXT: br label [[EXIT]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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; CHECK: fail:
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; CHECK-NEXT: unreachable
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;
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entry:
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%precondition = icmp ult i32 %x, 1000
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br i1 %precondition, label %loop, label %exit
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loop:
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%iv = phi i32 [%x, %entry], [%iv.next, %guarded]
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%tmp = add i32 %iv, 1
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%guard = icmp uge i32 %tmp, %iv
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br i1 %guard, label %guarded, label %fail
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guarded:
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%iv.next = add i32 %iv, -1
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%cond = icmp eq i32 %iv, 0
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br i1 %cond, label %loop, label %exit
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exit:
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ret void
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fail:
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unreachable
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}
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