forked from OSchip/llvm-project
36 lines
1.1 KiB
LLVM
36 lines
1.1 KiB
LLVM
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; RUN: opt < %s -loop-rotate -S | FileCheck %s
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; RUN: opt < %s -loop-rotate -enable-mssa-loop-dependency=true -verify-memoryssa -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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; Ensure that "llvm.loop.vectorize.enable" metadata was not lost after loop-rotate.
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; In past LoopRotate was clearing that metadata.
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;
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; See http://reviews.llvm.org/D3348 for details.
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; CHECK-LABEL: @foo
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; CHECK: loop_cond:
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; CHECK-NOT: loop-inc
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; CHECK: br i1 %cmp, label %return, label %loop_cond, !llvm.loop !0
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; CHECK: !0 = distinct !{!0, !1}
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; CHECK: !1 = !{!"llvm.loop.vectorize.enable", i1 true}
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define i32 @foo(i32 %a) {
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entry:
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br label %loop_cond
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loop_cond:
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%indx = phi i32 [ 1, %entry ], [ %inc, %loop_inc ]
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%cmp = icmp ne i32 %indx, %a
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br i1 %cmp, label %return, label %loop_inc
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loop_inc:
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%inc = add i32 %indx, 1
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br label %loop_cond, !llvm.loop !0
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return:
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ret i32 0
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}
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!0 = !{!0, !1}
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!1 = !{!"llvm.loop.vectorize.enable", i1 true}
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