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Add testcase for r154007, when a function has the optsize attribute,

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the loop should be unrolled according the value of OptSizeUnrollThreshold.

llvm-svn: 154014
This commit is contained in:
Hongbin Zheng 2012-04-04 13:24:40 +00:00
parent 88a1aeb123
commit 2a8f0cf400
1 changed files with 35 additions and 0 deletions
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35
test/Transforms/LoopUnroll/partial-unroll-optsize.ll Normal file
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; RUN: opt < %s -S -loop-unroll -unroll-allow-partial | FileCheck %s
; Loop size = 3, when the function has the optsize attribute, the
; OptSizeUnrollThreshold, i.e. 50, is used, hence the loop should be unrolled
; by 16 times because 3 * 16 < 50.
define void @unroll_opt_for_size() nounwind optsize {
entry:
br label %loop
loop:
%iv = phi i32 [ 0, %entry ], [ %inc, %loop ]
%inc = add i32 %iv, 1
%exitcnd = icmp uge i32 %inc, 1024
br i1 %exitcnd, label %exit, label %loop
exit:
ret void
}
; CHECK: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: add
; CHECK-NEXT: icmp