25 lines
744 B
LLVM
25 lines
744 B
LLVM
; RUN: opt < %s -loop-reduce -S | grep phi | count 1
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; This testcase should have ONE stride 18 indvar, the other use should have a
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; loop invariant value (B) added to it inside of the loop, instead of having
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; a whole indvar based on B for it.
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declare i1 @cond(i32)
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define void @test(i32 %B) {
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; <label>:0
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br label %Loop
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Loop: ; preds = %Loop, %0
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%IV = phi i32 [ 0, %0 ], [ %IVn, %Loop ] ; <i32> [#uses=3]
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%C = mul i32 %IV, 18 ; <i32> [#uses=1]
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%D = mul i32 %IV, 18 ; <i32> [#uses=1]
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%E = add i32 %D, %B ; <i32> [#uses=1]
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%cnd = call i1 @cond( i32 %E ) ; <i1> [#uses=1]
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call i1 @cond( i32 %C ) ; <i1>:1 [#uses=0]
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%IVn = add i32 %IV, 1 ; <i32> [#uses=1]
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br i1 %cnd, label %Loop, label %Out
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Out: ; preds = %Loop
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ret void
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}
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