llvm-6502/test/Transforms/LoopStrengthReduce/ops_after_indvar.ll
Dan Gohman 572645cf84 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95975 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-12 10:34:29 +00:00

25 lines
735 B
LLVM

; Check that this test makes INDVAR and related stuff dead, because P[indvar]
; gets reduced, making INDVAR dead.
; RUN: opt < %s -loop-reduce -S -default-data-layout="e-p:32:32:32" | not grep INDVAR
declare i1 @pred()
declare i32 @getidx()
define void @test([10000 x i32]* %P) {
; <label>:0
br label %Loop
Loop: ; preds = %Loop, %0
%INDVAR = phi i32 [ 0, %0 ], [ %INDVAR2, %Loop ] ; <i32> [#uses=2]
%idx = call i32 @getidx( ) ; <i32> [#uses=1]
%STRRED = getelementptr [10000 x i32]* %P, i32 %INDVAR, i32 %idx ; <i32*> [#uses=1]
store i32 0, i32* %STRRED
%INDVAR2 = add i32 %INDVAR, 1 ; <i32> [#uses=1]
%cond = call i1 @pred( ) ; <i1> [#uses=1]
br i1 %cond, label %Loop, label %Out
Out: ; preds = %Loop
ret void
}