51 lines
1.5 KiB
LLVM
51 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -verify-scev -passes="print<scalar-evolution>,loop-simplifycfg" -S %s 2>&1 | FileCheck %s
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; print<scalar-evolution> is used to compute SCEVs for all values & loops in
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; the function
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define void @test_pr58262(ptr %src) {
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; CHECK-LABEL: @test_pr58262(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP_1_HEADER:%.*]]
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; CHECK: loop.1.header.loopexit:
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; CHECK-NEXT: br label [[LOOP_1_HEADER]]
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; CHECK: loop.1.header:
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; CHECK-NEXT: switch i32 0, label [[LOOP_1_HEADER_SPLIT:%.*]] [
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; CHECK-NEXT: i32 1, label [[LOOP_1_HEADER_LOOPEXIT:%.*]]
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; CHECK-NEXT: ]
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; CHECK: loop.1.header.split:
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; CHECK-NEXT: br label [[LOOP_2_HEADER:%.*]]
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; CHECK: loop.2.header:
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; CHECK-NEXT: call void @clobber()
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; CHECK-NEXT: [[L:%.*]] = load i16, ptr [[SRC:%.*]], align 1
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; CHECK-NEXT: [[C:%.*]] = icmp ult i16 0, [[L]]
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; CHECK-NEXT: br i1 [[C]], label [[TRAP:%.*]], label [[LOOP_2_LATCH:%.*]]
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; CHECK: loop.2.latch:
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; CHECK-NEXT: br label [[LOOP_2_HEADER]]
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; CHECK: trap:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop.1.header
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loop.1.header:
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br label %loop.2.header
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loop.2.header:
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br i1 true, label %then, label %loop.1.header
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then:
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call void @clobber()
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%l = load i16, ptr %src, align 1
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%c = icmp ult i16 0, %l
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br i1 %c, label %trap, label %loop.2.latch
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loop.2.latch:
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br label %loop.2.header
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trap: ; preds = %for.body
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ret void
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}
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declare void @clobber()
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