llvm-6502/test/Transforms/LoopStrengthReduce/variable_stride.ll

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; Check that variable strides are reduced to adds instead of multiplies.
; RUN: opt < %s -loop-reduce -S | not grep mul
declare i1 @pred(i32)
define void @test([10000 x i32]* %P, i32 %STRIDE) {
; <label>:0
br label %Loop
Loop: ; preds = %Loop, %0
%INDVAR = phi i32 [ 0, %0 ], [ %INDVAR2, %Loop ] ; <i32> [#uses=2]
%Idx = mul i32 %INDVAR, %STRIDE ; <i32> [#uses=1]
%cond = call i1 @pred( i32 %Idx ) ; <i1> [#uses=1]
%INDVAR2 = add i32 %INDVAR, 1 ; <i32> [#uses=1]
br i1 %cond, label %Loop, label %Out
Out: ; preds = %Loop
ret void
}