Make for 32-bit only.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79614 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/FrontendC/ptr-rotate.c b/test/FrontendC/ptr-rotate.c
index fa9e14e..56c21f4 100644
--- a/test/FrontendC/ptr-rotate.c
+++ b/test/FrontendC/ptr-rotate.c
@@ -1,5 +1,5 @@
 // RUN: %llvmgcc %s -c -m32 -o /dev/null
-// RUN: %llvmgcc %s -c -O1 -m32 -emit-llvm -o - | llc -mtriple=i386-apple-darwin9.7 | FileCheck %s -check-prefix=DARWIN
+// RUN: %llvmgcc %s -c -O1 -m32 -emit-llvm -o - | llc -march=x86 -mtriple=i386-apple-darwin9.7 | FileCheck %s -check-prefix=DARWIN
 
 unsigned int func(void *A) {
   // DARWIN: roll $27