Print PPC ZERO as 0 (not r0) even on Darwin

It seems that the Darwin PPC assembler requires r0 to be written as 0 when it
means 0 (at least in lwarx/stwcx.). Fixes PR15605.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178142 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/PowerPC/PPCRegisterInfo.td b/lib/Target/PowerPC/PPCRegisterInfo.td
index aa5584ee3c7a4f02f0f4271eec98c0ea73295dee..57a25f5143fa843c91b1526bb2bb8ead4b9d7eb7 100644 (file)
--- a/lib/Target/PowerPC/PPCRegisterInfo.td
+++ b/lib/Target/PowerPC/PPCRegisterInfo.td
@@ -87,8 +87,8 @@ foreach Index = 0-31 in {
 }
 
 // The reprsentation of r0 when treated as the constant 0.
-def ZERO  : GPR<0, "r0">;
-def ZERO8 : GP8<ZERO, "r0">;
+def ZERO  : GPR<0, "0">;
+def ZERO8 : GP8<ZERO, "0">;
 
 // Representations of the frame pointer used by ISD::FRAMEADDR.
 def FP   : GPR<0 /* arbitrary */, "**FRAME POINTER**">;

diff --git a/test/CodeGen/PowerPC/atomic-1.ll b/test/CodeGen/PowerPC/atomic-1.ll
index cbfa4094fb4e3f44d16aa19e6672ae8219c0cc3f..838db20ddd1bb9ba37dcf7ee89a24019eb99711d 100644 (file)
--- a/test/CodeGen/PowerPC/atomic-1.ll
+++ b/test/CodeGen/PowerPC/atomic-1.ll
@@ -1,10 +1,10 @@
-; RUN: llc < %s -march=ppc32 |  FileCheck %s
+; RUN: llc < %s -mtriple=powerpc-apple-darwin -march=ppc32 |  FileCheck %s
 
 define i32 @exchange_and_add(i32* %mem, i32 %val) nounwind {
 ; CHECK: exchange_and_add:
-; CHECK: lwarx
+; CHECK: lwarx {{r[0-9]+}}, 0, {{r[0-9]+}}
   %tmp = atomicrmw add i32* %mem, i32 %val monotonic
-; CHECK: stwcx.
+; CHECK: stwcx. {{r[0-9]+}}, 0, {{r[0-9]+}}
   ret i32 %tmp
 }