[AArch64] [ARM] Make a target-independent llvm.thread.pointer intrinsic.

Both AArch64 and ARM support llvm.<arch>.thread.pointer intrinsics that
just return the thread pointer.  I have a pending patch that does the same
for SystemZ (D19054), and there are many more targets that could benefit
from one.

This patch merges the ARM and AArch64 intrinsics into a single target
independent one that will also be used by subsequent targets.

Differential Revision: http://reviews.llvm.org/D19098

llvm-svn: 266818

1 files changed, 19 insertions, 0 deletions

diff --git a/llvm/test/Assembler/autoupgrade-thread-pointer.ll b/llvm/test/Assembler/autoupgrade-thread-pointer.ll
new file mode 100644
index 00000000000..a96829d9b2e
--- /dev/null
+++ b/llvm/test/Assembler/autoupgrade-thread-pointer.ll
@@ -0,0 +1,19 @@
+; Test autoupgrade of arch-specific thread pointer intrinsics
+; RUN: llvm-as < %s | llvm-dis | FileCheck %s
+
+declare i8* @llvm.aarch64.thread.pointer()
+declare i8* @llvm.arm.thread.pointer()
+
+define i8* @test1() {
+; CHECK: test1()
+; CHECK: call i8* @llvm.thread.pointer()
+  %1 = call i8* @llvm.aarch64.thread.pointer()
+  ret i8 *%1
+}
+
+define i8* @test2() {
+; CHECK: test2()
+; CHECK: call i8* @llvm.thread.pointer()
+  %1 = call i8* @llvm.arm.thread.pointer()
+  ret i8 *%1
+}