49 lines
1.9 KiB
LLVM
49 lines
1.9 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt -S -passes='print<scalar-evolution>,loop(loop-unroll-full)' -verify-scev < %s 2>/dev/null | FileCheck %s
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define i32 @test(ptr %arg) {
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; CHECK-LABEL: define i32 @test
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; CHECK-SAME: (ptr [[ARG:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP_PEEL_BEGIN:%.*]]
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; CHECK: loop.peel.begin:
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; CHECK-NEXT: br label [[LOOP_PEEL:%.*]]
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; CHECK: loop.peel:
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; CHECK-NEXT: [[LOAD_PEEL:%.*]] = load i32, ptr null, align 4
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; CHECK-NEXT: br i1 false, label [[LOOP_EXIT:%.*]], label [[LOOP_LATCH_PEEL:%.*]]
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; CHECK: loop.latch.peel:
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; CHECK-NEXT: br i1 false, label [[LOOP_EXIT]], label [[LOOP_PEEL_NEXT:%.*]]
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; CHECK: loop.peel.next:
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; CHECK-NEXT: br label [[LOOP_PEEL_NEXT1:%.*]]
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; CHECK: loop.peel.next1:
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; CHECK-NEXT: br label [[ENTRY_PEEL_NEWPH:%.*]]
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; CHECK: entry.peel.newph:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[LOAD:%.*]] = load i32, ptr null, align 4
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; CHECK-NEXT: br i1 false, label [[LOOP_EXIT_LOOPEXIT:%.*]], label [[LOOP_LATCH:%.*]]
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; CHECK: loop.latch:
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; CHECK-NEXT: br i1 false, label [[LOOP_EXIT_LOOPEXIT]], label [[LOOP]], !llvm.loop [[LOOP0:![0-9]+]]
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; CHECK: loop.exit.loopexit:
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; CHECK-NEXT: [[EXITVAL_PH:%.*]] = phi i32 [ [[LOAD]], [[LOOP]] ], [ 0, [[LOOP_LATCH]] ]
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; CHECK-NEXT: br label [[LOOP_EXIT]]
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; CHECK: loop.exit:
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; CHECK-NEXT: [[EXITVAL:%.*]] = phi i32 [ [[LOAD_PEEL]], [[LOOP_PEEL]] ], [ 0, [[LOOP_LATCH_PEEL]] ], [ [[EXITVAL_PH]], [[LOOP_EXIT_LOOPEXIT]] ]
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; CHECK-NEXT: ret i32 [[EXITVAL]]
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;
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entry:
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br label %loop
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loop:
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%iv = phi ptr [ %arg, %loop.latch ], [ null, %entry ]
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%load = load i32, ptr null, align 4
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br i1 false, label %loop.exit, label %loop.latch
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loop.latch:
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br i1 false, label %loop.exit, label %loop
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loop.exit:
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%exitval = phi i32 [ 0, %loop.latch ], [ %load, %loop ]
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ret i32 %exitval
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}
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