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36 lines
944 B
LLVM
36 lines
944 B
LLVM
; RUN: llc -mcpu=atmega328p < %s -march=avr | FileCheck %s
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; CHECK-LABEL: loopy
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define internal fastcc void @loopy() {
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; In this case, when we expand `Select8`/`Select16`, we should be
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; replacing the existing MBB instead of adding a new one.
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;
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; https://github.com/avr-rust/rust/issues/49
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; CHECK: LBB0_{{[0-9]+}}:
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; CHECK: LBB0_{{[0-9]+}}:
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; CHECK-NOT: LBB0_{{[0-9]+}}:
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start:
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br label %bb7.preheader
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bb7.preheader: ; preds = %bb10, %start
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%i = phi i8 [ 0, %start ], [ %j, %bb10 ]
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%j = phi i8 [ 1, %start ], [ %next, %bb10 ]
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br label %bb10
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bb4: ; preds = %bb10
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ret void
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bb10: ; preds = %bb7.preheader
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tail call fastcc void @observe(i8 %i, i8 1)
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%0 = icmp ult i8 %j, 20
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%1 = zext i1 %0 to i8
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%next = add i8 %j, %1
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br i1 %0, label %bb7.preheader, label %bb4
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}
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declare void @observe(i8, i8);
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