[llvm-commits] CVS: llvm/test/Regression/Transforms/IndVarsSimplify/variable-stride-ivs.ll

[Chris Lattner]

Changes in directory llvm/test/Regression/Transforms/IndVarsSimplify:

variable-stride-ivs.ll added (r1.1)
---
Log message:

new testcase


---
Diffs of the changes:  (+41 -0)

 variable-stride-ivs.ll |   41 +++++++++++++++++++++++++++++++++++++++++
 1 files changed, 41 insertions(+)


Index: llvm/test/Regression/Transforms/IndVarsSimplify/variable-stride-ivs.ll
diff -c /dev/null llvm/test/Regression/Transforms/IndVarsSimplify/variable-stride-ivs.ll:1.1
*** /dev/null	Tue Aug  9 20:11:34 2005
--- llvm/test/Regression/Transforms/IndVarsSimplify/variable-stride-ivs.ll	Tue Aug  9 20:11:24 2005
***************
*** 0 ****
--- 1,41 ----
+ ; RUN: llvm-as < %s | opt -indvars -instcombine | llvm-dis | grep 'store int 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.
+ 
+ void %vnum_test8(int* %data) {
+ entry:
+         %tmp.1 = getelementptr int* %data, int 3                ; <int*> [#uses=1]
+         %tmp.2 = load int* %tmp.1               ; <int> [#uses=2]
+         %tmp.4 = getelementptr int* %data, int 4                ; <int*> [#uses=1]
+         %tmp.5 = load int* %tmp.4               ; <int> [#uses=2]
+         %tmp.8 = getelementptr int* %data, int 2                ; <int*> [#uses=1]
+         %tmp.9 = load int* %tmp.8               ; <int> [#uses=3]
+         %tmp.125 = setgt int %tmp.2, 0          ; <bool> [#uses=1]
+         br bool %tmp.125, label %no_exit.preheader, label %return
+ 
+ no_exit.preheader:              ; preds = %entry
+         %tmp.16 = getelementptr int* %data, int %tmp.9          ; <int*> [#uses=1]
+         br label %no_exit
+ 
+ no_exit:                ; preds = %no_exit, %no_exit.preheader
+         %iv. = phi uint [ 0, %no_exit.preheader ], [ %iv..inc, %no_exit ]               ; <uint> [#uses=1]
+         %iv. = phi int [ %tmp.5, %no_exit.preheader ], [ %iv..inc, %no_exit ]           ; <int> [#uses=2]
+         %m.0.0 = phi int [ %tmp.5, %no_exit.preheader ], [ %tmp.24, %no_exit ]          ; <int> [#uses=2]
+         store int 2, int* %tmp.16
+         %tmp.21 = sub int %m.0.0, %iv.          ; <int> [#uses=1]
+         store int %tmp.21, int* %data
+         %tmp.24 = add int %m.0.0, %tmp.9                ; <int> [#uses=1]
+         %iv..inc = add int %tmp.9, %iv.         ; <int> [#uses=1]
+         %iv..inc = add uint %iv., 1             ; <uint> [#uses=2]
+         %iv..inc1 = cast uint %iv..inc to int           ; <int> [#uses=1]
+         %tmp.12 = setlt int %iv..inc1, %tmp.2           ; <bool> [#uses=1]
+         br bool %tmp.12, label %no_exit, label %return.loopexit
+ 
+ return.loopexit:                ; preds = %no_exit
+         br label %return
+ 
+ return:         ; preds = %return.loopexit, %entry
+         ret void
+ }
+