36 lines
1.1 KiB
LLVM
36 lines
1.1 KiB
LLVM
; RUN: opt -mtriple=thumbv8.1m.main-none-none-eabi -hardware-loops %s -o - | FileCheck %s
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@g = common local_unnamed_addr global i32* null, align 4
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; CHECK-LABEL: counter_too_large
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; CHECK-NOT: call void @llvm.set.loop.iterations
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; CHECK-NOT: call i32 @llvm.loop.decrement
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define i32 @counter_too_large(i64 %n) {
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entry:
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%cmp7 = icmp eq i64 %n, 0
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br i1 %cmp7, label %while.end, label %while.body.lr.ph
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while.body.lr.ph:
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%0 = load i32*, i32** @g, align 4
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br label %while.body
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while.body:
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%i.09 = phi i64 [ 0, %while.body.lr.ph ], [ %inc1, %while.body ]
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%res.08 = phi i32 [ 0, %while.body.lr.ph ], [ %add, %while.body ]
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%idxprom = trunc i64 %i.09 to i32
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%arrayidx = getelementptr inbounds i32, i32* %0, i32 %idxprom
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%1 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %1, %res.08
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%inc1 = add nuw i64 %i.09, 1
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%cmp = icmp ult i64 %inc1, %n
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br i1 %cmp, label %while.body, label %while.end.loopexit
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while.end.loopexit:
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br label %while.end
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while.end:
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%res.0.lcssa = phi i32 [ 0, %entry ], [ %add, %while.end.loopexit ]
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ret i32 %res.0.lcssa
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}
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