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36 lines
812 B
LLVM
36 lines
812 B
LLVM
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; RUN: opt < %s -S -loop-unroll -unroll-allow-partial | FileCheck %s
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; Loop size = 3, when the function has the optsize attribute, the
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; OptSizeUnrollThreshold, i.e. 50, is used, hence the loop should be unrolled
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; by 16 times because 3 * 16 < 50.
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define void @unroll_opt_for_size() nounwind optsize {
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %inc, %loop ]
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%inc = add i32 %iv, 1
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%exitcnd = icmp uge i32 %inc, 1024
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br i1 %exitcnd, label %exit, label %loop
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exit:
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ret void
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}
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; CHECK: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: add
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; CHECK-NEXT: icmp
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