[llvm] r273845 - [ConstantFolding] Fix bitcast vector of i1.

[Igor Breger via llvm-commits]

Author: ibreger
Date: Mon Jun 27 01:42:54 2016
New Revision: 273845

URL: http://llvm.org/viewvc/llvm-project?rev=273845&view=rev
Log:
[ConstantFolding] Fix bitcast vector of i1.

Differential Revision: http://reviews.llvm.org/D21735

Modified:
    llvm/trunk/lib/Analysis/ConstantFolding.cpp
    llvm/trunk/test/Transforms/InstCombine/bitcast.ll

Modified: llvm/trunk/lib/Analysis/ConstantFolding.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/ConstantFolding.cpp?rev=273845&r1=273844&r2=273845&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/ConstantFolding.cpp (original)
+++ llvm/trunk/lib/Analysis/ConstantFolding.cpp Mon Jun 27 01:42:54 2016
@@ -81,7 +81,7 @@ Constant *FoldBitCast(Constant *C, Type
 
     // Now that we know that the input value is a vector of integers, just shift
     // and insert them into our result.
-    unsigned BitShift = DL.getTypeAllocSizeInBits(SrcEltTy);
+    unsigned BitShift = DL.getTypeSizeInBits(SrcEltTy);
     APInt Result(IT->getBitWidth(), 0);
     for (unsigned i = 0; i != NumSrcElts; ++i) {
       Constant *Element;

Modified: llvm/trunk/test/Transforms/InstCombine/bitcast.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/bitcast.ll?rev=273845&r1=273844&r2=273845&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/bitcast.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/bitcast.ll Mon Jun 27 01:42:54 2016
@@ -262,3 +262,10 @@ define <2 x i64> @test7(<2 x i8*>* %arg)
 ; CHECK: bitcast
 ; CHECK: load
 }
+
+define i8 @test8() {
+  %res = bitcast <8 x i1> <i1 true, i1 true, i1 false, i1 true, i1 false, i1 true, i1 false, i1 true> to i8
+  ret i8 %res
+; CHECK: @test8
+; CHECK: ret i8 -85
+}