X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=test%2FTransforms%2FDeadStoreElimination%2FPartialStore.ll;h=d85b4de0ab983d0bf2c77acd68a435092705d79c;hb=43be1d53d1b92c28f3ca6d500dd1ff32d4ddf4b9;hp=d22e4afda58ca38513e545df2a1a58edf43fd877;hpb=b1e1e82c54c060ea5dae09dae043234826ca2539;p=oota-llvm.git

diff --git a/test/Transforms/DeadStoreElimination/PartialStore.ll b/test/Transforms/DeadStoreElimination/PartialStore.ll
index d22e4afda58..d85b4de0ab9 100644
--- a/test/Transforms/DeadStoreElimination/PartialStore.ll
+++ b/test/Transforms/DeadStoreElimination/PartialStore.ll
@@ -1,13 +1,87 @@
-; RUN: opt %s -dse | llvm-dis | \
-; RUN:    not grep {store i8}
+; RUN: opt < %s -basicaa -dse -S | FileCheck %s
+target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
+
 ; Ensure that the dead store is deleted in this case.  It is wholely
 ; overwritten by the second store.
-define i32 @test() {
-        %V = alloca i32         ; <i32*> [#uses=3]
+define void @test1(i32 *%V) {
         %V2 = bitcast i32* %V to i8*            ; <i8*> [#uses=1]
         store i8 0, i8* %V2
         store i32 1234567, i32* %V
-        %X = load i32* %V               ; <i32> [#uses=1]
-        ret i32 %X
+        ret void
+; CHECK-LABEL: @test1(
+; CHECK-NEXT: store i32 1234567
+}
+
+; Note that we could do better by merging the two stores into one.
+define void @test2(i32* %P) {
+; CHECK-LABEL: @test2(
+  store i32 0, i32* %P
+; CHECK: store i32
+  %Q = bitcast i32* %P to i16*
+  store i16 1, i16* %Q
+; CHECK: store i16
+  ret void
+}
+
+
+define i32 @test3(double %__x) {
+; CHECK-LABEL: @test3(
+; CHECK: store double
+  %__u = alloca { [3 x i32] }
+  %tmp.1 = bitcast { [3 x i32] }* %__u to double*
+  store double %__x, double* %tmp.1
+  %tmp.4 = getelementptr { [3 x i32] }, { [3 x i32] }* %__u, i32 0, i32 0, i32 1
+  %tmp.5 = load i32, i32* %tmp.4
+  %tmp.6 = icmp slt i32 %tmp.5, 0
+  %tmp.7 = zext i1 %tmp.6 to i32
+  ret i32 %tmp.7
+}
+
+; PR6043
+define void @test4(i8* %P) {
+; CHECK-LABEL: @test4(
+; CHECK-NEXT: bitcast
+; CHECK-NEXT: store double
+
+  store i8 19, i8* %P  ;; dead
+  %A = getelementptr i8, i8* %P, i32 3
+
+  store i8 42, i8* %A  ;; dead
+
+  %Q = bitcast i8* %P to double*
+  store double 0.0, double* %Q
+  ret void
+}
+
+; PR8657
+declare void @test5a(i32*)
+define void @test5(i32 %i) nounwind ssp {
+  %A = alloca i32
+  %B = bitcast i32* %A to i8*
+  %C = getelementptr i8, i8* %B, i32 %i
+  store i8 10, i8* %C        ;; Dead store to variable index.
+  store i32 20, i32* %A
+
+  call void @test5a(i32* %A)
+  ret void
+; CHECK-LABEL: @test5(
+; CHECK-NEXT: alloca
+; CHECK-NEXT: store i32 20
+; CHECK-NEXT: call void @test5a
 }
 
+declare void @test5a_as1(i32*)
+define void @test5_addrspacecast(i32 %i) nounwind ssp {
+  %A = alloca i32
+  %B = addrspacecast i32* %A to i8 addrspace(1)*
+  %C = getelementptr i8, i8 addrspace(1)* %B, i32 %i
+  store i8 10, i8 addrspace(1)* %C        ;; Dead store to variable index.
+  store i32 20, i32* %A
+
+  call void @test5a(i32* %A)
+  ret void
+; CHECK-LABEL: @test5_addrspacecast(
+; CHECK-NEXT: alloca
+; CHECK-NEXT: store i32 20
+; CHECK-NEXT: call void @test5a
+}