new testcase

[oota-llvm.git] / test / Transforms / InstCombine / load.ll

diff --git a/test/Transforms/InstCombine/load.ll b/test/Transforms/InstCombine/load.ll
index f80e02e464e1673e51df61c324f4f1d259b57b87..056f3177a135481590d08783615e46421e069d3f 100644 (file)
--- a/test/Transforms/InstCombine/load.ll
+++ b/test/Transforms/InstCombine/load.ll
@@ -1,11 +1,14 @@
 ; This test makes sure that these instructions are properly eliminated.
 ;
 
-; RUN: as < %s | opt -instcombine | dis | grep-not load
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep load
 
 %X = constant int 42
+%X2 = constant int 47
 %Y = constant [2 x { int, float }] [ { int, float } { int 12, float 1.0 }, 
                                      { int, float } { int 37, float 1.2312 } ]
+%Z = constant [2 x { int, float }] zeroinitializer
+
 int %test1() {
        %B = load int* %X
        ret int %B
@@ -17,10 +20,48 @@ float %test2() {
        ret float %B
 }
 
+
 int %test3() {
        %A = getelementptr [2 x { int, float}]* %Y, long 0, long 0, ubyte 0
        %B = load int* %A
        ret int %B
 }
 
+int %test4() {
+       %A = getelementptr [2 x { int, float}]* %Z, long 0, long 1, ubyte 0
+       %B = load int* %A
+       ret int %B
+}
+
+; load (select (Cond, &V1, &V2))  --> select(Cond, load &V1, load &V2)
+int %test5(bool %C) {
+       %Y = select bool %C, int* %X, int* %X2
+       %Z = load int* %Y
+       ret int %Z
+}
+
+; load (phi (&V1, &V2, &V3))  --> phi(load &V1, load &V2, load &V3)
+int %test6(bool %C) {
+entry:
+        br bool %C, label %cond_true.i, label %cond_continue.i
+
+cond_true.i:
+        br label %cond_continue.i
+
+cond_continue.i:
+        %mem_tmp.i.0 = phi int* [ %X, %cond_true.i ], [ %X2, %entry ]
+        %tmp.3 = load int* %mem_tmp.i.0
+        ret int %tmp.3
+}
 
+int %test7(int %X) {
+       %V = getelementptr int* null, int %X
+       %R = load int* %V
+       ret int %R
+}
+
+int %test8(int* %P) {
+       store int 1, int* %P
+       %X = load int* %P        ;; Trivial store->load forwarding
+       ret int %X
+}