90 lines
2.8 KiB
LLVM
90 lines
2.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -indvars -S | FileCheck %s
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; RUN: opt < %s -passes=indvars -S | FileCheck %s
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define void @test_signed(i32 %start) {
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; CHECK-LABEL: @test_signed(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[START:%.*]], -2147483648
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; CHECK-NEXT: br i1 [[COND]], 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:%.*]] ], [ [[START]], [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], -1
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; CHECK-NEXT: [[CHECK:%.*]] = icmp slt i32 [[IV_NEXT]], [[IV]]
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; CHECK-NEXT: br i1 [[CHECK]], label [[GUARDED]], label [[FAIL:%.*]]
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; CHECK: guarded:
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp ne i32 [[IV]], -2147483648
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; CHECK-NEXT: br i1 [[LOOP_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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%cond = icmp ne i32 %start, -2147483648
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br i1 %cond, label %loop, label %exit
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loop:
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%iv = phi i32 [%start, %entry], [%iv.next, %guarded]
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%iv.next = add i32 %iv, -1
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%check = icmp slt i32 %iv.next, %iv
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br i1 %check, label %guarded, label %fail
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guarded:
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%loop.cond = icmp ne i32 %iv, -2147483648
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br i1 %loop.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_unsigned(i32 %start) {
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; CHECK-LABEL: @test_unsigned(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[START:%.*]], 0
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; CHECK-NEXT: br i1 [[COND]], 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:%.*]] ], [ [[START]], [[LOOP_PREHEADER]] ]
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], -1
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; CHECK-NEXT: [[CHECK:%.*]] = icmp ult i32 [[IV_NEXT]], [[IV]]
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; CHECK-NEXT: br i1 [[CHECK]], label [[GUARDED]], label [[FAIL:%.*]]
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; CHECK: guarded:
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; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp ne i32 [[IV]], 0
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; CHECK-NEXT: br i1 [[LOOP_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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%cond = icmp ne i32 %start, 0
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br i1 %cond, label %loop, label %exit
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loop:
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%iv = phi i32 [%start, %entry], [%iv.next, %guarded]
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%iv.next = add i32 %iv, -1
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%check = icmp ult i32 %iv.next, %iv
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br i1 %check, label %guarded, label %fail
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guarded:
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%loop.cond = icmp ne i32 %iv, 0
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br i1 %loop.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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