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| 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/CodeGen/X86 | |
| 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/CodeGen/X86')
| -rw-r--r-- | test/CodeGen/X86/aliases.ll | 15 | ||||
| -rw-r--r-- | test/CodeGen/X86/dllexport-x86_64.ll | 2 |
2 files changed, 15 insertions, 2 deletions
diff --git a/test/CodeGen/X86/aliases.ll b/test/CodeGen/X86/aliases.ll index d207880d66..bf55644de4 100644 --- a/test/CodeGen/X86/aliases.ll +++ b/test/CodeGen/X86/aliases.ll @@ -38,7 +38,7 @@ define i32 @foo_f() { @bar_i = alias internal i32* @bar ; CHECK-DAG: .globl A -@A = alias i64, i32* @bar +@A = alias bitcast (i32* @bar to i64*) ; CHECK-DAG: .globl bar_h ; CHECK-DAG: .hidden bar_h @@ -48,6 +48,19 @@ define i32 @foo_f() { ; CHECK-DAG: .protected bar_p @bar_p = protected alias i32* @bar +; CHECK-DAG: test2 = bar+4 +@test2 = alias getelementptr(i32 *@bar, i32 1) + +; CHECK-DAG: test3 = 42 +@test3 = alias inttoptr(i32 42 to i32*) + +; CHECK-DAG: test4 = bar +@test4 = alias inttoptr(i64 ptrtoint (i32* @bar to i64) to i32*) + +; CHECK-DAG: test5 = test2-bar +@test5 = alias inttoptr(i32 sub (i32 ptrtoint (i32* @test2 to i32), + i32 ptrtoint (i32* @bar to i32)) to i32*) + ; CHECK-DAG: .globl test define i32 @test() { entry: diff --git a/test/CodeGen/X86/dllexport-x86_64.ll b/test/CodeGen/X86/dllexport-x86_64.ll index f4dec4ff59..0d5afa1b13 100644 --- a/test/CodeGen/X86/dllexport-x86_64.ll +++ b/test/CodeGen/X86/dllexport-x86_64.ll @@ -73,7 +73,7 @@ define weak_odr dllexport void @weak1() { @weak_alias = dllexport alias weak_odr void()* @f1 @blob = global [6 x i8] c"\B8*\00\00\00\C3", section ".text", align 16 -@blob_alias = dllexport alias i32 (), [6 x i8]* @blob +@blob_alias = dllexport alias bitcast ([6 x i8]* @blob to i32 ()*) ; CHECK: .section .drectve ; WIN32: " /EXPORT:Var1,DATA" |