X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=test%2FOther%2Fconstant-fold-gep.ll;h=926bdbc1b464e1b311f49590de3011b6dc5b73b0;hb=8239daf7c83a65a189c352cce3191cdc3bbfe151;hp=2888b3d2b0d9d37d63b42f0ebb6b2ae0f2e7eebb;hpb=a84ffedafc102013a935817f30485a47d3dc2383;p=oota-llvm.git

diff --git a/test/Other/constant-fold-gep.ll b/test/Other/constant-fold-gep.ll
index 2888b3d2b0d..926bdbc1b46 100644
--- a/test/Other/constant-fold-gep.ll
+++ b/test/Other/constant-fold-gep.ll
@@ -21,10 +21,12 @@
 ; PLAIN: %1 = type { double, float, double, double }
 ; PLAIN: %2 = type { i1, i1* }
 ; PLAIN: %3 = type { i64, i64 }
+; PLAIN: %4 = type { i32, i32 }
 ; OPT: %0 = type { i1, double }
 ; OPT: %1 = type { double, float, double, double }
 ; OPT: %2 = type { i1, i1* }
 ; OPT: %3 = type { i64, i64 }
+; OPT: %4 = type { i32, i32 }
 
 ; The automatic constant folder in opt does not have targetdata access, so
 ; it can't fold gep arithmetic, in general. However, the constant folder run
@@ -110,9 +112,19 @@
 ; TO: @N = constant i64* inttoptr (i64 8 to i64*)
 ; TO: @O = constant i64* inttoptr (i64 8 to i64*)
 
-@M = constant i64* getelementptr (i64 *null, i32 1)
-@N = constant i64* getelementptr ({ i64, i64 } *null, i32 0, i32 1)
-@O = constant i64* getelementptr ([2 x i64] *null, i32 0, i32 1)
+@M = constant i64* getelementptr (i64* null, i32 1)
+@N = constant i64* getelementptr ({ i64, i64 }* null, i32 0, i32 1)
+@O = constant i64* getelementptr ([2 x i64]* null, i32 0, i32 1)
+
+; Fold GEP of a GEP. Theoretically some of these cases could be folded
+; without using targetdata, however that's not implemented yet.
+
+; PLAIN: @Z = global i32* getelementptr inbounds (i32* getelementptr inbounds ([3 x %4]* @ext, i64 0, i64 1, i32 0), i64 1)
+; OPT: @Z = global i32* getelementptr (i32* getelementptr inbounds ([3 x %4]* @ext, i64 0, i64 1, i32 0), i64 1)
+; TO: @Z = global i32* getelementptr inbounds ([3 x %0]* @ext, i64 0, i64 1, i32 1)
+
+@ext = external global [3 x { i32, i32 }]
+@Z = global i32* getelementptr inbounds (i32* getelementptr inbounds ([3 x { i32, i32 }]* @ext, i64 0, i64 1, i32 0), i64 1)
 
 ; Duplicate all of the above as function return values rather than
 ; global initializers.
@@ -244,15 +256,15 @@ define i1* @hoo1() nounwind {
 ; PLAIN:   ret i64 %t
 ; PLAIN: }
 ; PLAIN: define i64 @fg() nounwind {
-; PLAIN:   %t = bitcast i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
+; PLAIN:   %t = bitcast i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64) to i64
 ; PLAIN:   ret i64 %t
 ; PLAIN: }
 ; PLAIN: define i64 @fh() nounwind {
-; PLAIN:   %t = bitcast i64 ptrtoint (i1** getelementptr (i1** null, i32 1) to i64)
+; PLAIN:   %t = bitcast i64 ptrtoint (i1** getelementptr (i1** null, i32 1) to i64) to i64
 ; PLAIN:   ret i64 %t
 ; PLAIN: }
 ; PLAIN: define i64 @fi() nounwind {
-; PLAIN:   %t = bitcast i64 ptrtoint (i1** getelementptr (%2* null, i64 0, i32 1) to i64)
+; PLAIN:   %t = bitcast i64 ptrtoint (i1** getelementptr (%2* null, i64 0, i32 1) to i64) to i64
 ; PLAIN:   ret i64 %t
 ; PLAIN: }
 ; OPT: define i64 @fa() nounwind {
@@ -328,13 +340,13 @@ define i1* @hoo1() nounwind {
 ; SCEV:   %t = bitcast i64 1 to i64 
 ; SCEV:   -->  1
 ; SCEV: Classifying expressions for: @fg
-; SCEV:   %t = bitcast i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
+; SCEV:   %t = bitcast i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64) to i64
 ; SCEV:   -->  alignof(double)
 ; SCEV: Classifying expressions for: @fh
-; SCEV:   %t = bitcast i64 ptrtoint (i1** getelementptr (i1** null, i32 1) to i64)
+; SCEV:   %t = bitcast i64 ptrtoint (i1** getelementptr (i1** null, i32 1) to i64) to i64
 ; SCEV:   -->  sizeof(i1*)
 ; SCEV: Classifying expressions for: @fi
-; SCEV:   %t = bitcast i64 ptrtoint (i1** getelementptr (%2* null, i64 0, i32 1) to i64)
+; SCEV:   %t = bitcast i64 ptrtoint (i1** getelementptr (%2* null, i64 0, i32 1) to i64) to i64
 ; SCEV:   -->  alignof(i1*)
 
 define i64 @fa() nounwind {
@@ -415,14 +427,33 @@ define i64 @fi() nounwind {
 ; SCEV:   -->  sizeof(i64)
 
 define i64* @fM() nounwind {
-  %t = bitcast i64* getelementptr (i64 *null, i32 1) to i64*
+  %t = bitcast i64* getelementptr (i64* null, i32 1) to i64*
   ret i64* %t
 }
 define i64* @fN() nounwind {
-  %t = bitcast i64* getelementptr ({ i64, i64 } *null, i32 0, i32 1) to i64*
+  %t = bitcast i64* getelementptr ({ i64, i64 }* null, i32 0, i32 1) to i64*
   ret i64* %t
 }
 define i64* @fO() nounwind {
-  %t = bitcast i64* getelementptr ([2 x i64] *null, i32 0, i32 1) to i64*
+  %t = bitcast i64* getelementptr ([2 x i64]* null, i32 0, i32 1) to i64*
   ret i64* %t
 }
+
+; PLAIN: define i32* @fZ() nounwind {
+; PLAIN:   %t = bitcast i32* getelementptr inbounds (i32* getelementptr inbounds ([3 x %4]* @ext, i64 0, i64 1, i32 0), i64 1) to i32*
+; PLAIN:   ret i32* %t
+; PLAIN: }
+; OPT: define i32* @fZ() nounwind {
+; OPT:   ret i32* getelementptr inbounds (i32* getelementptr inbounds ([3 x %4]* @ext, i64 0, i64 1, i32 0), i64 1)
+; OPT: }
+; TO: define i32* @fZ() nounwind {
+; TO:   ret i32* getelementptr inbounds ([3 x %0]* @ext, i64 0, i64 1, i32 1)
+; TO: }
+; SCEV: Classifying expressions for: @fZ
+; SCEV:   %t = bitcast i32* getelementptr inbounds (i32* getelementptr inbounds ([3 x %4]* @ext, i64 0, i64 1, i32 0), i64 1) to i32*
+; SCEV:   -->  ((3 * sizeof(i32)) + @ext)
+
+define i32* @fZ() nounwind {
+  %t = bitcast i32* getelementptr inbounds (i32* getelementptr inbounds ([3 x { i32, i32 }]* @ext, i64 0, i64 1, i32 0), i64 1) to i32*
+  ret i32* %t
+}