29 lines
745 B
LLVM
29 lines
745 B
LLVM
; RUN: opt < %s -S -loop-unroll -unroll-threshold=800 -unroll-peel-max-count=0 | FileCheck %s
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; We should not peel this loop even though we can, because the max count is set
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; to zero.
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define i32 @invariant_backedge_neg_1(i32 %a, i32 %b) {
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; CHECK-LABEL: @invariant_backedge_neg_1
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; CHECK-NOT loop.peel{{.*}}:
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; CHECK: loop:
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; CHECK: %i = phi
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; CHECK: %sum = phi
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; CHECK: %plus = phi
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entry:
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br label %loop
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loop:
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%i = phi i32 [ 0, %entry ], [ %inc, %loop ]
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%sum = phi i32 [ 0, %entry ], [ %incsum, %loop ]
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%plus = phi i32 [ %a, %entry ], [ %b, %loop ]
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%incsum = add i32 %sum, %plus
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%inc = add i32 %i, 1
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%cmp = icmp slt i32 %i, 1000
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br i1 %cmp, label %loop, label %exit
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exit:
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ret i32 %sum
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}
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