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For example, on 32-bit architecture, don't promote all uses of the IV to 64-bits just because one use is a 64-bit cast. Alternate implementation of the patch by Arnaud de Grandmaison. llvm-svn: 127884
27 lines
740 B
LLVM
27 lines
740 B
LLVM
; Check that this test makes INDVAR and related stuff dead, because P[indvar]
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; gets reduced, making INDVAR dead.
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; RUN: opt < %s -loop-reduce -S | not grep INDVAR
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target datalayout = "e-p:32:32:32-n:32"
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declare i1 @pred()
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declare i32 @getidx()
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define void @test([10000 x i32]* %P) {
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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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%INDVAR = phi i32 [ 0, %0 ], [ %INDVAR2, %Loop ] ; <i32> [#uses=2]
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%idx = call i32 @getidx( ) ; <i32> [#uses=1]
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%STRRED = getelementptr [10000 x i32]* %P, i32 %INDVAR, i32 %idx ; <i32*> [#uses=1]
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store i32 0, i32* %STRRED
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%INDVAR2 = add i32 %INDVAR, 1 ; <i32> [#uses=1]
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%cond = call i1 @pred( ) ; <i1> [#uses=1]
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br i1 %cond, 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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