54 lines
2.1 KiB
LLVM
54 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -S -passes=indvars < %s | FileCheck %s
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; Do not infer that %cmp is true. The %indvar3 input of %indvar2 comes from
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; a previous iteration, so we should not compare it to a value from the current
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; iteration.
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define i32 @test() {
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; CHECK-LABEL: define i32 @test() {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: br label %[[FOR_PREHEADER:.*]]
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; CHECK: [[FOR_PREHEADER]]:
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; CHECK-NEXT: [[INDVAR1:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[PHI:%.*]], %[[FOR_INC:.*]] ]
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; CHECK-NEXT: [[INDVAR2:%.*]] = phi i32 [ 1, %[[ENTRY]] ], [ [[INDVAR3:%.*]], %[[FOR_INC]] ]
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; CHECK-NEXT: [[INDVAR3]] = phi i32 [ 0, %[[ENTRY]] ], [ [[INC:%.*]], %[[FOR_INC]] ]
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; CHECK-NEXT: [[COND1:%.*]] = icmp eq i32 [[INDVAR3]], 0
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; CHECK-NEXT: br i1 [[COND1]], label %[[FOR_INC]], label %[[FOR_END:.*]]
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; CHECK: [[FOR_END]]:
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; CHECK-NEXT: [[CMP:%.*]] = icmp samesign ugt i32 [[INDVAR2]], 0
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; CHECK-NEXT: [[EXT:%.*]] = zext i1 [[CMP]] to i32
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; CHECK-NEXT: br label %[[FOR_INC]]
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; CHECK: [[FOR_INC]]:
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; CHECK-NEXT: [[PHI]] = phi i32 [ [[EXT]], %[[FOR_END]] ], [ 0, %[[FOR_PREHEADER]] ]
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[INDVAR3]], 1
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[INDVAR3]], 2
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; CHECK-NEXT: br i1 [[EXITCOND]], label %[[FOR_EXIT:.*]], label %[[FOR_PREHEADER]]
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; CHECK: [[FOR_EXIT]]:
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; CHECK-NEXT: [[INDVAR1_LCSSA:%.*]] = phi i32 [ [[INDVAR1]], %[[FOR_INC]] ]
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; CHECK-NEXT: ret i32 [[INDVAR1_LCSSA]]
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;
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entry:
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br label %for.preheader
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for.preheader:
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%indvar1 = phi i32 [ 0, %entry ], [ %phi, %for.inc ]
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%indvar2 = phi i32 [ 1, %entry ], [ %indvar3, %for.inc ]
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%indvar3 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%cond1 = icmp eq i32 %indvar3, 0
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br i1 %cond1, label %for.inc, label %for.end
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for.end:
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%cmp = icmp sgt i32 %indvar2, 0
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%ext = zext i1 %cmp to i32
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br label %for.inc
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for.inc:
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%phi = phi i32 [ %ext, %for.end ], [ 0, %for.preheader ]
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%inc = add i32 %indvar3, 1
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%exitcond = icmp eq i32 %indvar3, 2
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br i1 %exitcond, label %for.exit, label %for.preheader
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for.exit:
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ret i32 %indvar1
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}
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