Simplify some getNode calls.

[oota-llvm.git] / test / Analysis / BasicAA / licmtest.ll

diff --git a/test/Analysis/BasicAA/licmtest.ll b/test/Analysis/BasicAA/licmtest.ll
index f54a130791ffc24f139089a277bc88a8eeb81267..cfef63b1fd49a0e2910dfd40d3fca503f5bc5c11 100644 (file)
--- a/test/Analysis/BasicAA/licmtest.ll
+++ b/test/Analysis/BasicAA/licmtest.ll
@@ -1,32 +1,41 @@
 ; Test that LICM uses basicaa to do alias analysis, which is capable of 
-; disambiguating some obvious cases.  The ToRemove load should be eliminated
-; in this testcase.  This testcase was carefully contrived so that GCSE would
-; not be able to eliminate the load itself, without licm's help.  This is 
-; because, for GCSE, the load is killed by the dummy basic block.
-
-; RUN: if as < %s | opt -basicaa -licm -gcse -simplifycfg -instcombine | dis | grep ToRemove
-; RUN: then exit 1
-; RUN: else exit 0
-; RUN: fi
-
-%A = global int 7
-%B = global int 8
-implementation
-
-int %test(bool %c) {
-       %ToRemove = load int* %A
-       br label %Loop
-Loop:
-       %Atmp = load int* %A
-       store int %Atmp, int* %B  ; Store cannot alias %A
-
-       br bool %c, label %Out, label %Loop
-Out:
-       %X = sub int %ToRemove, %Atmp
-       ret int %X
-
-Dummy:
-       store int 7, int* %A
-       br label %Loop
+; disambiguating some obvious cases.  If LICM is able to disambiguate the
+; two pointers, then the load should be hoisted, and the store sunk.
+
+; RUN: llvm-as < %s | opt -basicaa -licm | llvm-dis | %prcontext @A 1 | not grep Loop
+
+@A = global i32 7               ; <i32*> [#uses=3]
+@B = global i32 8               ; <i32*> [#uses=2]
+@C = global [2 x i32] [ i32 4, i32 8 ]          ; <[2 x i32]*> [#uses=2]
+
+define i32 @test(i1 %c) {
+        %Atmp = load i32* @A            ; <i32> [#uses=2]
+        br label %Loop
+
+Loop:           ; preds = %Loop, %0
+        %ToRemove = load i32* @A                ; <i32> [#uses=1]
+        store i32 %Atmp, i32* @B
+        br i1 %c, label %Out, label %Loop
+
+Out:            ; preds = %Loop
+        %X = sub i32 %ToRemove, %Atmp           ; <i32> [#uses=1]
+        ret i32 %X
+}
+
+define i32 @test2(i1 %c) {
+        br label %Loop
+
+Loop:           ; preds = %Loop, %0
+        %AVal = load i32* @A            ; <i32> [#uses=2]
+        %C0 = getelementptr [2 x i32]* @C, i64 0, i64 0         ; <i32*> [#uses=1]
+        store i32 %AVal, i32* %C0
+        %BVal = load i32* @B            ; <i32> [#uses=2]
+        %C1 = getelementptr [2 x i32]* @C, i64 0, i64 1         ; <i32*> [#uses=1]
+        store i32 %BVal, i32* %C1
+        br i1 %c, label %Out, label %Loop
+
+Out:            ; preds = %Loop
+        %X = sub i32 %AVal, %BVal               ; <i32> [#uses=1]
+        ret i32 %X
 }