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llvm-mirror/test/Transforms/LoopStrengthReduce/remove_indvar.ll
Dan Gohman c40eb525ad Reapply the new LoopStrengthReduction code, with compile time and
bug fixes, and with improved heuristics for analyzing foreign-loop
addrecs.

This change also flattens IVUsers, eliminating the stride-oriented
groupings, which makes it easier to work with.

llvm-svn: 95975
2010-02-12 10:34:29 +00:00

22 lines
627 B
LLVM

; Check that this test makes INDVAR and related stuff dead.
; RUN: opt < %s -loop-reduce -S | not grep INDVAR
declare i1 @pred()
define void @test(i32* %P) {
; <label>:0
br label %Loop
Loop: ; preds = %Loop, %0
%i = phi i32 [ 0, %0 ], [ %i.next, %Loop ]
%INDVAR = phi i32 [ 0, %0 ], [ %INDVAR2, %Loop ] ; <i32> [#uses=2]
%STRRED = getelementptr i32* %P, i32 %INDVAR ; <i32*> [#uses=1]
store i32 0, i32* %STRRED
%INDVAR2 = add i32 %INDVAR, 1 ; <i32> [#uses=1]
%i.next = add i32 %i, 1
%cond = call i1 @pred( ) ; <i1> [#uses=1]
br i1 %cond, label %Loop, label %Out
Out: ; preds = %Loop
ret void
}