forked from OSchip/llvm-project
52 lines
1.7 KiB
LLVM
52 lines
1.7 KiB
LLVM
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; RUN: opt -loop-unroll -S %s | FileCheck %s
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; Check that the loop body exists.
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; CHECK: for.body
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; CHECK: if.then
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; CHECK: asm.fallthrough
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; CHECK: l_yes
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; CHECK: for.inc
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; Check that the loop body does not get unrolled. We could modify this test in
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; the future to support loop unrolling callbr's IFF we checked that the callbr
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; operands were unrolled/updated correctly, as today they are not.
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; CHECK-NOT: if.then.1
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; CHECK-NOT: asm.fallthrough.1
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; CHECK-NOT: l_yes.1
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; CHECK-NOT: for.inc.1
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; CHECK-NOT: if.then.2
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; CHECK-NOT: asm.fallthrough.2
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; CHECK-NOT: l_yes.2
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; CHECK-NOT: for.inc.2
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define dso_local void @d() {
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.inc
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ret void
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for.body: ; preds = %for.inc, %entry
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%e.04 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%tobool = icmp eq i32 %e.04, 0
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br i1 %tobool, label %for.inc, label %if.then
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if.then: ; preds = %for.body
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callbr void asm sideeffect "1: nop\0A\09.quad b, ${0:l}, $$5\0A\09", "X,~{dirflag},~{fpsr},~{flags}"(i8* blockaddress(@d, %l_yes))
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to label %asm.fallthrough [label %l_yes]
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asm.fallthrough: ; preds = %if.then
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br label %l_yes
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l_yes: ; preds = %asm.fallthrough, %if.then
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%call = tail call i32 (...) @g()
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br label %for.inc
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for.inc: ; preds = %for.body, %l_yes
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%inc = add nuw nsw i32 %e.04, 1
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%exitcond = icmp eq i32 %inc, 3
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br i1 %exitcond, label %for.cond.cleanup, label %for.body
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}
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declare dso_local i32 @g(...) local_unnamed_addr
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