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llvm-6502/test/Transforms/IndVarSimplify/variable-stride-ivs-0.ll
Dan Gohman f2f6ce65b7 Change tests from "opt %s" to "opt < %s" so that opt doesn't see the
input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81537 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-11 18:01:28 +00:00

44 lines
2.1 KiB
LLVM

; RUN: opt < %s -indvars -instcombine -S | \
; RUN: grep {store i32 0}
; Test that -indvars can reduce variable stride IVs. If it can reduce variable
; stride iv's, it will make %iv. and %m.0.0 isomorphic to each other without
; cycles, allowing the tmp.21 subtraction to be eliminated.
; END.
define void @vnum_test8(i32* %data) {
entry:
%tmp.1 = getelementptr i32* %data, i32 3 ; <i32*> [#uses=1]
%tmp.2 = load i32* %tmp.1 ; <i32> [#uses=2]
%tmp.4 = getelementptr i32* %data, i32 4 ; <i32*> [#uses=1]
%tmp.5 = load i32* %tmp.4 ; <i32> [#uses=2]
%tmp.8 = getelementptr i32* %data, i32 2 ; <i32*> [#uses=1]
%tmp.9 = load i32* %tmp.8 ; <i32> [#uses=3]
%tmp.125 = icmp sgt i32 %tmp.2, 0 ; <i1> [#uses=1]
br i1 %tmp.125, label %no_exit.preheader, label %return
no_exit.preheader: ; preds = %entry
%tmp.16 = getelementptr i32* %data, i32 %tmp.9 ; <i32*> [#uses=1]
br label %no_exit
no_exit: ; preds = %no_exit, %no_exit.preheader
%iv.ui = phi i32 [ 0, %no_exit.preheader ], [ %iv..inc.ui, %no_exit ] ; <i32> [#uses=1]
%iv. = phi i32 [ %tmp.5, %no_exit.preheader ], [ %iv..inc, %no_exit ] ; <i32> [#uses=2]
%m.0.0 = phi i32 [ %tmp.5, %no_exit.preheader ], [ %tmp.24, %no_exit ] ; <i32> [#uses=2]
store i32 2, i32* %tmp.16
%tmp.21 = sub i32 %m.0.0, %iv. ; <i32> [#uses=1]
store i32 %tmp.21, i32* %data
%tmp.24 = add i32 %m.0.0, %tmp.9 ; <i32> [#uses=1]
%iv..inc = add i32 %tmp.9, %iv. ; <i32> [#uses=1]
%iv..inc.ui = add i32 %iv.ui, 1 ; <i32> [#uses=2]
%iv..inc1 = bitcast i32 %iv..inc.ui to i32 ; <i32> [#uses=1]
%tmp.12 = icmp slt i32 %iv..inc1, %tmp.2 ; <i1> [#uses=1]
br i1 %tmp.12, label %no_exit, label %return.loopexit
return.loopexit: ; preds = %no_exit
br label %return
return: ; preds = %return.loopexit, %entry
ret void
}