Update the cpu specified on some PPC regression tests

Some of these tests did not specify a cpu but were also sensitive to
instruction scheduling and/or register assignment choices. A few others
similarly-sensitive tests specified a cpu (often the POWER7), and while the P7
currently uses the default model for PPC64, this will soon change. For those
tests which should not really be cpu-dependent anyway, the cpu is set to the
generic 'ppc64'.

llvm-svn: 195977
diff --git a/llvm/test/CodeGen/PowerPC/coalesce-ext.ll b/llvm/test/CodeGen/PowerPC/coalesce-ext.ll
index f19175c..eb7cd26 100644
--- a/llvm/test/CodeGen/PowerPC/coalesce-ext.ll
+++ b/llvm/test/CodeGen/PowerPC/coalesce-ext.ll
@@ -1,4 +1,4 @@
-; RUN: llc -march=ppc64 -mtriple=powerpc64-apple-darwin < %s | FileCheck %s
+; RUN: llc -march=ppc64 -mcpu=g5 -mtriple=powerpc64-apple-darwin < %s | FileCheck %s
 ; Check that the peephole optimizer knows about sext and zext instructions.
 ; CHECK: test1sext
 define i32 @test1sext(i64 %A, i64 %B, i32* %P, i64 *%P2) nounwind {