[llvm] r192053 - [Sparc] Use addxcc/subxcc for adde/sube instead of addx/subx.

[Venkatraman Govindaraju]

Author: venkatra
Date: Sat Oct  5 21:11:10 2013
New Revision: 192053

URL: http://llvm.org/viewvc/llvm-project?rev=192053&view=rev
Log:
[Sparc] Use addxcc/subxcc for adde/sube instead of addx/subx.
addx/subx does not modify conditional codes whereas addxcc/subxx does.

Modified:
    llvm/trunk/lib/Target/Sparc/SparcInstrInfo.td
    llvm/trunk/test/CodeGen/SPARC/2011-01-11-CC.ll

Modified: llvm/trunk/lib/Target/Sparc/SparcInstrInfo.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Sparc/SparcInstrInfo.td?rev=192053&r1=192052&r2=192053&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Sparc/SparcInstrInfo.td (original)
+++ llvm/trunk/lib/Target/Sparc/SparcInstrInfo.td Sat Oct  5 21:11:10 2013
@@ -504,13 +504,13 @@ def LEA_ADDri   : F3_2<2, 0b000000,
 let Defs = [ICC] in
   defm ADDCC  : F3_12<"addcc", 0b010000, addc>;
 
-let Uses = [ICC] in
-  defm ADDX  : F3_12<"addx", 0b001000, adde>;
+let Uses = [ICC], Defs = [ICC] in
+  defm ADDX  : F3_12<"addxcc", 0b001000, adde>;
 
 // Section B.15 - Subtract Instructions, p. 110
 defm SUB    : F3_12  <"sub"  , 0b000100, sub>;
-let Uses = [ICC] in
-  defm SUBX   : F3_12  <"subx" , 0b001100, sube>;
+let Uses = [ICC], Defs = [ICC] in
+  defm SUBX   : F3_12  <"subxcc" , 0b001100, sube>;
 
 let Defs = [ICC] in
   defm SUBCC  : F3_12  <"subcc", 0b010100, subc>;

Modified: llvm/trunk/test/CodeGen/SPARC/2011-01-11-CC.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/SPARC/2011-01-11-CC.ll?rev=192053&r1=192052&r2=192053&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/SPARC/2011-01-11-CC.ll (original)
+++ llvm/trunk/test/CodeGen/SPARC/2011-01-11-CC.ll Sat Oct  5 21:11:10 2013
@@ -135,3 +135,42 @@ exit.0:
 exit.1:
    ret i32 1
 }
+
+; V8-LABEL: test_adde_sube
+; V8:       addcc
+; V8:       addxcc
+; V8:       addxcc
+; V8:       addxcc
+; V8:       subcc
+; V8:       subxcc
+; V8:       subxcc
+; V8:       subxcc
+
+
+; V9-LABEL: test_adde_sube
+; V9:       addcc
+; V9:       addxcc
+; V9:       addxcc
+; V9:       addxcc
+; V9:       subcc
+; V9:       subxcc
+; V9:       subxcc
+; V9:       subxcc
+
+
+define void @test_adde_sube(i8* %a, i8* %b, i8* %sum, i8* %diff) {
+entry:
+   %0 = bitcast i8* %a to i128*
+   %1 = bitcast i8* %b to i128*
+   %2 = load i128* %0
+   %3 = load i128* %1
+   %4 = add i128 %2, %3
+   %5 = bitcast i8* %sum to i128*
+   store i128 %4, i128* %5
+   tail call void asm sideeffect "", "=*m,*m"(i128 *%0, i128* %5) nounwind
+   %6 = load i128* %0
+   %7 = sub i128 %2, %6
+   %8 = bitcast i8* %diff to i128*
+   store i128 %7, i128* %8
+   ret void
+}