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603fff3968
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139578 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
637 B
LLVM
24 lines
637 B
LLVM
; The loop canonicalization pass should guarantee that there is one backedge
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; for all loops. This allows the -indvars pass to recognize the %IV
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; induction variable in this testcase.
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; RUN: opt < %s -indvars -S | FileCheck %s
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; CHECK: Loop.backedge:
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; CHECK-NOT: br
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; CHECK: br label %Loop
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define i32 @test(i1 %C) {
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; <label>:0
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br label %Loop
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Loop: ; preds = %BE2, %BE1, %0
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%IV = phi i32 [ 1, %0 ], [ %IV2, %BE1 ], [ %IV2, %BE2 ] ; <i32> [#uses=2]
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store i32 %IV, i32* null
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%IV2 = add i32 %IV, 2 ; <i32> [#uses=2]
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br i1 %C, label %BE1, label %BE2
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BE1: ; preds = %Loop
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br label %Loop
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BE2: ; preds = %Loop
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br label %Loop
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}
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