[llvm] r209222 - Avoids DCE on write_register

[Renato Golin]

Author: rengolin
Date: Tue May 20 12:40:03 2014
New Revision: 209222

URL: http://llvm.org/viewvc/llvm-project?rev=209222&view=rev
Log:
Avoids DCE on write_register

Modified:
    llvm/trunk/include/llvm/IR/Intrinsics.td
    llvm/trunk/test/CodeGen/X86/stackpointer.ll

Modified: llvm/trunk/include/llvm/IR/Intrinsics.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/Intrinsics.td?rev=209222&r1=209221&r2=209222&view=diff
==============================================================================
--- llvm/trunk/include/llvm/IR/Intrinsics.td (original)
+++ llvm/trunk/include/llvm/IR/Intrinsics.td Tue May 20 12:40:03 2014
@@ -253,7 +253,7 @@ def int_frameaddress  : Intrinsic<[llvm_
 def int_read_register  : Intrinsic<[llvm_anyint_ty], [llvm_metadata_ty],
                                    [IntrNoMem], "llvm.read_register">;
 def int_write_register : Intrinsic<[], [llvm_metadata_ty, llvm_anyint_ty],
-                                   [IntrNoMem], "llvm.write_register">;
+                                   [], "llvm.write_register">;
 
 // Note: we treat stacksave/stackrestore as writemem because we don't otherwise
 // model their dependencies on allocas.

Modified: llvm/trunk/test/CodeGen/X86/stackpointer.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/stackpointer.ll?rev=209222&r1=209221&r2=209222&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/stackpointer.ll (original)
+++ llvm/trunk/test/CodeGen/X86/stackpointer.ll Tue May 20 12:40:03 2014
@@ -1,11 +1,13 @@
 ; RUN: llc < %s -mtriple=x86_64-apple-darwin  | FileCheck %s
 ; RUN: llc < %s -mtriple=x86_64-linux-gnueabi | FileCheck %s
+; RUN: opt < %s -O3 -S -mtriple=x86_64-linux-gnueabi | FileCheck %s --check-prefix=OPT
 
 define i64 @get_stack() nounwind {
 entry:
 ; CHECK-LABEL: get_stack:
 ; CHECK: movq	%rsp, %rax
 	%sp = call i64 @llvm.read_register.i64(metadata !0)
+; OPT: @llvm.read_register.i64
   ret i64 %sp
 }
 
@@ -14,6 +16,7 @@ entry:
 ; CHECK-LABEL: set_stack:
 ; CHECK: movq	%rdi, %rsp
   call void @llvm.write_register.i64(metadata !0, i64 %val)
+; OPT: @llvm.write_register.i64
   ret void
 }