19 lines
467 B
LLVM
19 lines
467 B
LLVM
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; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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; Check that we can get rid of empty block leading to header
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; if it does not introduce new edge.
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define i32 @test(i32 %c) {
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entry:
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br label %header
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header:
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%i = phi i32 [0, %entry], [%i.1, %backedge]
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%i.1 = add i32 %i, 1
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%cmp = icmp slt i32 %i.1, %c
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br i1 %cmp, label %backedge, label %exit
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; CHECK-NOT: backedge:
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backedge:
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br label %header
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exit:
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ret i32 %i
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}
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