[llvm-commits] [llvm] r75586 - in /llvm/trunk: lib/Transforms/Scalar/InstructionCombining.cpp test/Transforms/InstCombine/mul.ll

[Eli Friedman]

Author: efriedma
Date: Mon Jul 13 21:01:53 2009
New Revision: 75586

URL: http://llvm.org/viewvc/llvm-project?rev=75586&view=rev
Log:
Fix trivial todo in instcombine.


Modified:
    llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp
    llvm/trunk/test/Transforms/InstCombine/mul.ll

Modified: llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp?rev=75586&r1=75585&r2=75586&view=diff

==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp Mon Jul 13 21:01:53 2009
@@ -2702,7 +2702,8 @@
                  Context->getConstantInt(Op0->getType(), Val.logBase2()));
       }
     } else if (isa<VectorType>(Op1->getType())) {
-      // TODO: If Op1 is all zeros and Op0 is all finite, return all zeros.
+      if (Op1->isNullValue())
+        return ReplaceInstUsesWith(I, Op1);
 
       if (ConstantVector *Op1V = dyn_cast<ConstantVector>(Op1)) {
         if (Op1V->isAllOnesValue())              // X * -1 == 0 - X

Modified: llvm/trunk/test/Transforms/InstCombine/mul.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/mul.ll?rev=75586&r1=75585&r2=75586&view=diff

==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/mul.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/mul.ll Mon Jul 13 21:01:53 2009
@@ -83,3 +83,8 @@
 	store <4 x float> %3, <4 x float>* %0, align 1
 	ret void
 }
+
+define <16 x i8> @test14(<16 x i8> %a) {
+        %b = mul <16 x i8> %a, zeroinitializer
+        ret <16 x i8> %b
+}