forked from OSchip/llvm-project
56 lines
1.0 KiB
LLVM
56 lines
1.0 KiB
LLVM
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; RUN: opt -loop-unroll -verify-loop-lcssa -S < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@b = external local_unnamed_addr global i32, align 4
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; CHECK-LABEL: @main
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; CHECK: exit.loopexit:
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; CHECK: {{.*}} = phi i32 [ %d.0, %h3 ]
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; CHECK: br label %exit
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; CHECK: exit.loopexit1:
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; CHECK: {{.*}} = phi i32 [ %d.0, %h3.1 ]
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; CHECK: br label %exit
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define void @main() local_unnamed_addr #0 {
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ph1:
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br label %h1
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h1:
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%d.0 = phi i32 [ %1, %latch1 ], [ undef, %ph1 ]
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br label %ph2
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ph2:
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br label %h2
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h2:
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%0 = phi i32 [ 0, %ph2 ], [ %inc, %latch2 ]
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br label %h3
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h3:
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br i1 undef, label %latch3, label %exit
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latch3:
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br i1 false, label %exit3, label %h3
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exit3:
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br label %latch2
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latch2:
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%inc = add nuw nsw i32 %0, 1
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%cmp = icmp slt i32 %inc, 2
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br i1 %cmp, label %h2, label %exit2
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exit2:
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br i1 undef, label %latch1, label %ph2
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latch1: ; preds = %exit2
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%1 = load i32, i32* @b, align 4
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br label %h1
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exit:
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%d.0.lcssa = phi i32 [ %d.0, %h3 ]
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ret void
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}
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