X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=test%2FTransforms%2FInstCombine%2Fcast_ptr.ll;h=eaf946ef92598bc529151bdb0fe705a379d069b7;hp=6544e7d735a44d1bef7b8cd57f4f32effc6cee0a;hb=76755680f6325f0cad7502a2a832a3376b1e3747;hpb=f2f6ce65b79df6ec4ee427d51a18355a170f199b

diff --git a/test/Transforms/InstCombine/cast_ptr.ll b/test/Transforms/InstCombine/cast_ptr.ll
index 6544e7d735a..eaf946ef925 100644
--- a/test/Transforms/InstCombine/cast_ptr.ll
+++ b/test/Transforms/InstCombine/cast_ptr.ll
@@ -1,12 +1,14 @@
 ; Tests to make sure elimination of casts is working correctly
 ; RUN: opt < %s -instcombine -S | FileCheck %s
 
-target datalayout = "p:32:32"
+target datalayout = "p:32:32-p1:32:32-p2:16:16"
+
+@global = global i8 0
 
 ; This shouldn't convert to getelementptr because the relationship
 ; between the arithmetic and the layout of allocated memory is
 ; entirely unknown.
-; CHECK: @test1
+; CHECK-LABEL: @test1(
 ; CHECK: ptrtoint
 ; CHECK: add
 ; CHECK: inttoptr
@@ -18,7 +20,7 @@ define i8* @test1(i8* %t) {
 }
 
 ; These casts should be folded away.
-; CHECK: @test2
+; CHECK-LABEL: @test2(
 ; CHECK: icmp eq i8* %a, %b
 define i1 @test2(i8* %a, i8* %b) {
         %tmpa = ptrtoint i8* %a to i32          ; <i32> [#uses=1]
@@ -27,3 +29,101 @@ define i1 @test2(i8* %a, i8* %b) {
         ret i1 %r
 }
 
+; These casts should be folded away.
+; CHECK-LABEL: @test2_as2_same_int(
+; CHECK: icmp eq i8 addrspace(2)* %a, %b
+define i1 @test2_as2_same_int(i8 addrspace(2)* %a, i8 addrspace(2)* %b) {
+  %tmpa = ptrtoint i8 addrspace(2)* %a to i16
+  %tmpb = ptrtoint i8 addrspace(2)* %b to i16
+  %r = icmp eq i16 %tmpa, %tmpb
+  ret i1 %r
+}
+
+; These casts should be folded away.
+; CHECK-LABEL: @test2_as2_larger(
+; CHECK: icmp eq i8 addrspace(2)* %a, %b
+define i1 @test2_as2_larger(i8 addrspace(2)* %a, i8 addrspace(2)* %b) {
+  %tmpa = ptrtoint i8 addrspace(2)* %a to i32
+  %tmpb = ptrtoint i8 addrspace(2)* %b to i32
+  %r = icmp eq i32 %tmpa, %tmpb
+  ret i1 %r
+}
+
+; These casts should not be folded away.
+; CHECK-LABEL: @test2_diff_as
+; CHECK: icmp sge i32 %i0, %i1
+define i1 @test2_diff_as(i8* %p, i8 addrspace(1)* %q) {
+  %i0 = ptrtoint i8* %p to i32
+  %i1 = ptrtoint i8 addrspace(1)* %q to i32
+  %r0 = icmp sge i32 %i0, %i1
+  ret i1 %r0
+}
+
+; These casts should not be folded away.
+; CHECK-LABEL: @test2_diff_as_global
+; CHECK: icmp sge i32 %i1
+define i1 @test2_diff_as_global(i8 addrspace(1)* %q) {
+  %i0 = ptrtoint i8* @global to i32
+  %i1 = ptrtoint i8 addrspace(1)* %q to i32
+  %r0 = icmp sge i32 %i1, %i0
+  ret i1 %r0
+}
+
+; These casts should also be folded away.
+; CHECK-LABEL: @test3(
+; CHECK: icmp eq i8* %a, @global
+define i1 @test3(i8* %a) {
+        %tmpa = ptrtoint i8* %a to i32
+        %r = icmp eq i32 %tmpa, ptrtoint (i8* @global to i32)
+        ret i1 %r
+}
+
+define i1 @test4(i32 %A) {
+  %B = inttoptr i32 %A to i8*
+  %C = icmp eq i8* %B, null
+  ret i1 %C
+; CHECK-LABEL: @test4(
+; CHECK-NEXT: %C = icmp eq i32 %A, 0
+; CHECK-NEXT: ret i1 %C
+}
+
+define i1 @test4_as2(i16 %A) {
+; CHECK-LABEL: @test4_as2(
+; CHECK-NEXT: %C = icmp eq i16 %A, 0
+; CHECK-NEXT: ret i1 %C
+  %B = inttoptr i16 %A to i8 addrspace(2)*
+  %C = icmp eq i8 addrspace(2)* %B, null
+  ret i1 %C
+}
+
+
+; Pulling the cast out of the load allows us to eliminate the load, and then
+; the whole array.
+
+        %op = type { float }
+        %unop = type { i32 }
+@Array = internal constant [1 x %op* (%op*)*] [ %op* (%op*)* @foo ]             ; <[1 x %op* (%op*)*]*> [#uses=1]
+
+declare %op* @foo(%op* %X)
+
+define %unop* @test5(%op* %O) {
+        %tmp = load %unop* (%op*)*, %unop* (%op*)** bitcast ([1 x %op* (%op*)*]* @Array to %unop* (%op*)**); <%unop* (%op*)*> [#uses=1]
+        %tmp.2 = call %unop* %tmp( %op* %O )            ; <%unop*> [#uses=1]
+        ret %unop* %tmp.2
+; CHECK-LABEL: @test5(
+; CHECK: call %op* @foo(%op* %O)
+}
+
+
+
+; InstCombine can not 'load (cast P)' -> cast (load P)' if the cast changes
+; the address space.
+
+define i8 @test6(i8 addrspace(1)* %source) {
+entry:
+  %arrayidx223 = addrspacecast i8 addrspace(1)* %source to i8*
+  %tmp4 = load i8, i8* %arrayidx223
+  ret i8 %tmp4
+; CHECK-LABEL: @test6(
+; CHECK: load i8, i8* %arrayidx223
+}