[llvm-commits] [llvm] r168280 - in /llvm/trunk: lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp test/Transforms/InstCombine/alloca.ll

[Nick Lewycky]

Author: nicholas
Date: Sat Nov 17 23:39:39 2012
New Revision: 168280

URL: http://llvm.org/viewvc/llvm-project?rev=168280&view=rev
Log:
Don't try to calculate the alignment of an unsigned type. Fixes PR14371!

Modified:
    llvm/trunk/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
    llvm/trunk/test/Transforms/InstCombine/alloca.ll

Modified: llvm/trunk/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp?rev=168280&r1=168279&r2=168280&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp (original)
+++ llvm/trunk/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp Sat Nov 17 23:39:39 2012
@@ -164,7 +164,8 @@
       return TD.getPreferredAlignment(GV);
 
   if (PointerType *PT = dyn_cast<PointerType>(V->getType()))
-    return TD.getABITypeAlignment(PT->getElementType());
+    if (PT->getElementType()->isSized())
+      return TD.getABITypeAlignment(PT->getElementType());
 
   return 0;
 }

Modified: llvm/trunk/test/Transforms/InstCombine/alloca.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/alloca.ll?rev=168280&r1=168279&r2=168280&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/alloca.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/alloca.ll Sat Nov 17 23:39:39 2012
@@ -94,3 +94,19 @@
   tail call void @f(i32* %b)
   ret void
 }
+
+; PR14371
+%opaque_type = type opaque
+%real_type = type { { i32, i32* } }
+
+ at opaque_global = external constant %opaque_type, align 4
+
+define void @test7() {
+entry:
+  %0 = alloca %real_type, align 4
+  %1 = bitcast %real_type* %0 to i8*
+  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %1, i8* bitcast (%opaque_type* @opaque_global to i8*), i32 8, i32 1, i1 false)
+  ret void
+}
+
+declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind