[llvm] r269681 - [WebAssembly] Use eqz to negate a branch conditions.

[Dan Gohman via llvm-commits]

Author: djg
Date: Mon May 16 13:59:34 2016
New Revision: 269681

URL: http://llvm.org/viewvc/llvm-project?rev=269681&view=rev
Log:
[WebAssembly] Use eqz to negate a branch conditions.

Modified:
    llvm/trunk/lib/Target/WebAssembly/WebAssemblyLowerBrUnless.cpp
    llvm/trunk/test/CodeGen/WebAssembly/cfg-stackify.ll

Modified: llvm/trunk/lib/Target/WebAssembly/WebAssemblyLowerBrUnless.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/WebAssembly/WebAssemblyLowerBrUnless.cpp?rev=269681&r1=269680&r2=269681&view=diff
==============================================================================
--- llvm/trunk/lib/Target/WebAssembly/WebAssemblyLowerBrUnless.cpp (original)
+++ llvm/trunk/lib/Target/WebAssembly/WebAssemblyLowerBrUnless.cpp Mon May 16 13:59:34 2016
@@ -106,16 +106,10 @@ bool WebAssemblyLowerBrUnless::runOnMach
       // If we weren't able to invert the condition in place. Insert an
       // expression to invert it.
       if (!Inverted) {
-        unsigned ZeroReg = MRI.createVirtualRegister(&WebAssembly::I32RegClass);
-        MFI.stackifyVReg(ZeroReg);
-        BuildMI(MBB, MI, MI->getDebugLoc(), TII.get(WebAssembly::CONST_I32),
-                ZeroReg)
-            .addImm(0);
         unsigned Tmp = MRI.createVirtualRegister(&WebAssembly::I32RegClass);
         MFI.stackifyVReg(Tmp);
-        BuildMI(MBB, MI, MI->getDebugLoc(), TII.get(WebAssembly::EQ_I32), Tmp)
-            .addReg(Cond)
-            .addReg(ZeroReg);
+        BuildMI(MBB, MI, MI->getDebugLoc(), TII.get(WebAssembly::EQZ_I32), Tmp)
+            .addReg(Cond);
         Cond = Tmp;
         Inverted = true;
       }

Modified: llvm/trunk/test/CodeGen/WebAssembly/cfg-stackify.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/WebAssembly/cfg-stackify.ll?rev=269681&r1=269680&r2=269681&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/WebAssembly/cfg-stackify.ll (original)
+++ llvm/trunk/test/CodeGen/WebAssembly/cfg-stackify.ll Mon May 16 13:59:34 2016
@@ -1261,8 +1261,7 @@ bb50:
 ; OPT:        block
 ; OPT:        block
 ; OPT-NEXT:   i32.const   $push
-; OPT-NEXT:   i32.const   $push
-; OPT-NEXT:   i32.eq      $push{{.*}}=, $pop{{.*}}, $pop{{.*}}{{$}}
+; OPT-NEXT:   i32.eqz     $push{{.*}}=, $pop{{.*}}{{$}}
 ; OPT-NEXT:   br_if       0, $pop{{.*}}{{$}}
 ; OPT-NEXT:   call        test15_callee1 at FUNCTION{{$}}
 ; OPT-NEXT:   br          1{{$}}