diff options
| author | Rafael Espindola <rafael.espindola@gmail.com> | 2014-06-03 02:41:57 +0000 |
|---|---|---|
| committer | Rafael Espindola <rafael.espindola@gmail.com> | 2014-06-03 02:41:57 +0000 |
| commit | 2d21b25393a461fbf8ab824889a6c56e1dd0b1cb (patch) | |
| tree | 2a66d16ed61fd38a800d76e014bf585fbc454f05 /test/Feature | |
| parent | 27bd9b361bf11cd6dfe4ea3932adc6afadcf4a86 (diff) | |
| download | llvm-2d21b25393a461fbf8ab824889a6c56e1dd0b1cb.tar.gz llvm-2d21b25393a461fbf8ab824889a6c56e1dd0b1cb.tar.bz2 llvm-2d21b25393a461fbf8ab824889a6c56e1dd0b1cb.tar.xz | |
Allow alias to point to an arbitrary ConstantExpr.
This patch changes GlobalAlias to point to an arbitrary ConstantExpr and it is
up to MC (or the system assembler) to decide if that expression is valid or not.
This reduces our ability to diagnose invalid uses and how early we can spot
them, but it also lets us do things like
@test5 = alias inttoptr(i32 sub (i32 ptrtoint (i32* @test2 to i32),
i32 ptrtoint (i32* @bar to i32)) to i32*)
An important implication of this patch is that the notion of aliased global
doesn't exist any more. The alias has to encode the information needed to
access it in its metadata (linkage, visibility, type, etc).
Another consequence to notice is that getSection has to return a "const char *".
It could return a NullTerminatedStringRef if there was such a thing, but when
that was proposed the decision was to just uses "const char*" for that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210062 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Feature')
| -rw-r--r-- | test/Feature/alias2.ll | 22 | ||||
| -rw-r--r-- | test/Feature/aliases.ll | 4 |
2 files changed, 17 insertions, 9 deletions
diff --git a/test/Feature/alias2.ll b/test/Feature/alias2.ll index bc542ffd77..73c874f2b9 100644 --- a/test/Feature/alias2.ll +++ b/test/Feature/alias2.ll @@ -6,17 +6,23 @@ @v2 = global [1 x i32] zeroinitializer ; CHECK: @v2 = global [1 x i32] zeroinitializer -@a1 = alias i16, i32* @v1 -; CHECK: @a1 = alias i16, i32* @v1 +@v3 = global [2 x i16] zeroinitializer +; CHECK: @v3 = global [2 x i16] zeroinitializer -@a2 = alias i32, [1 x i32]* @v2 -; CHECK: @a2 = alias i32, [1 x i32]* @v2 +@a1 = alias bitcast (i32* @v1 to i16*) +; CHECK: @a1 = alias bitcast (i32* @v1 to i16*) -@a3 = alias addrspace(2) i32, i32* @v1 -; CHECK: @a3 = alias addrspace(2) i32, i32* @v1 +@a2 = alias bitcast([1 x i32]* @v2 to i32*) +; CHECK: @a2 = alias getelementptr inbounds ([1 x i32]* @v2, i32 0, i32 0) -@a4 = alias i16, i32* @v1 -; CHECK: @a4 = alias i16, i32* @v1 +@a3 = alias addrspacecast (i32* @v1 to i32 addrspace(2)*) +; CHECK: @a3 = alias addrspacecast (i32* @v1 to i32 addrspace(2)*) + +@a4 = alias bitcast (i32* @v1 to i16*) +; CHECK: @a4 = alias bitcast (i32* @v1 to i16*) @a5 = thread_local(localdynamic) alias i32* @v1 ; CHECK: @a5 = thread_local(localdynamic) alias i32* @v1 + +@a6 = alias getelementptr ([2 x i16]* @v3, i32 1, i32 1) +; CHECK: @a6 = alias getelementptr ([2 x i16]* @v3, i32 1, i32 1) diff --git a/test/Feature/aliases.ll b/test/Feature/aliases.ll index b2ce82a838..7fe9d0b374 100644 --- a/test/Feature/aliases.ll +++ b/test/Feature/aliases.ll @@ -7,6 +7,7 @@ @bar = global i32 0 @foo1 = alias i32* @bar @foo2 = alias i32* @bar +@foo3 = alias i32* @foo2 %FunTy = type i32() @@ -14,10 +15,11 @@ define i32 @foo_f() { ret i32 0 } @bar_f = alias weak_odr %FunTy* @foo_f +@bar_ff = alias i32()* @bar_f @bar_i = alias internal i32* @bar -@A = alias i64, i32* @bar +@A = alias bitcast (i32* @bar to i64*) define i32 @test() { entry: |