forked from OSchip/llvm-project
26 lines
963 B
LLVM
26 lines
963 B
LLVM
; RUN: opt < %s -S -loop-unroll -pass-remarks=loop-unroll -unroll-count=16 2>&1 | FileCheck -check-prefix=COMPLETE-UNROLL %s
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; RUN: opt < %s -S -loop-unroll -pass-remarks=loop-unroll -unroll-count=4 2>&1 | FileCheck -check-prefix=PARTIAL-UNROLL %s
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; COMPLETE-UNROLL: remark: {{.*}}: completely unrolled loop with 16 iterations
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; PARTIAL-UNROLL: remark: {{.*}}: unrolled loop by a factor of 4
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define i32 @sum() {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%s.06 = phi i32 [ 0, %entry ], [ %add1, %for.body ]
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%i.05 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%add = add nsw i32 %i.05, 4
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%call = tail call i32 @baz(i32 %add) #2
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%add1 = add nsw i32 %call, %s.06
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%inc = add nsw i32 %i.05, 1
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%exitcond = icmp eq i32 %inc, 16
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret i32 %add1
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}
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declare i32 @baz(i32)
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