[ppc64] Temporary disable sibling call optimization on ppc64 due to b…

…reaking test case

r265506 breaks print-stack-trace.cc test case of compiler-rt in bootstrap
test.

http://lab.llvm.org:8011/builders/clang-ppc64be-linux-multistage/builds/1708

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265528 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/PowerPC/PPCISelLowering.cpp

@@ -55,7 +55,7 @@ cl::desc("disable setting the node scheduling preference to ILP on PPC"), cl::Hi
 static cl::opt<bool> DisablePPCUnaligned("disable-ppc-unaligned",
 cl::desc("disable unaligned load/store generation on PPC"), cl::Hidden);
 
-static cl::opt<bool> DisableSCO("disable-ppc-sco",
+static cl::opt<bool> DisableSCO("disable-ppc-sco", cl::init(true),
 cl::desc("disable sibling call optimization on ppc"), cl::Hidden);
 
 STATISTIC(NumTailCalls, "Number of tail calls");

test/CodeGen/PowerPC/ppc64-sibcall-shrinkwrap.ll

@@ -1,7 +1,7 @@
-; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu --enable-shrink-wrap=false | FileCheck %s -check-prefix=CHECK-SCO-ONLY
-; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu --enable-shrink-wrap=true | FileCheck %s -check-prefix=CHECK-SCO-SHRK
-; RUN: llc < %s -mtriple=powerpc64le-unknown-linux-gnu --enable-shrink-wrap=false | FileCheck %s -check-prefix=CHECK-SCO-ONLY
-; RUN: llc < %s -mtriple=powerpc64le-unknown-linux-gnu --enable-shrink-wrap=true | FileCheck %s -check-prefix=CHECK-SCO-SHRK
+; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -disable-ppc-sco=false --enable-shrink-wrap=false | FileCheck %s -check-prefix=CHECK-SCO-ONLY
+; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -disable-ppc-sco=false --enable-shrink-wrap=true | FileCheck %s -check-prefix=CHECK-SCO-SHRK
+; RUN: llc < %s -mtriple=powerpc64le-unknown-linux-gnu -disable-ppc-sco=false --enable-shrink-wrap=false | FileCheck %s -check-prefix=CHECK-SCO-ONLY
+; RUN: llc < %s -mtriple=powerpc64le-unknown-linux-gnu -disable-ppc-sco=false --enable-shrink-wrap=true | FileCheck %s -check-prefix=CHECK-SCO-SHRK
 
 %"class.clang::NamedDecl" = type { i32 }
 declare void @__assert_fail();

test/CodeGen/PowerPC/ppc64-sibcall.ll

@@ -1,6 +1,6 @@
-; RUN: llc < %s -O1 -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu | FileCheck %s -check-prefix=CHECK-SCO
-; RUN: llc < %s -O1 -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr8 | FileCheck %s -check-prefix=CHECK-SCO-HASQPX
-; RUN: llc < %s -O1 -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -mcpu=pwr8 | FileCheck %s -check-prefix=CHECK-SCO-HASQPX
+; RUN: llc < %s -O1 -disable-ppc-sco=false -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu | FileCheck %s -check-prefix=CHECK-SCO
+; RUN: llc < %s -O1 -disable-ppc-sco=false -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr8 | FileCheck %s -check-prefix=CHECK-SCO-HASQPX
+; RUN: llc < %s -O1 -disable-ppc-sco=false -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -mcpu=pwr8 | FileCheck %s -check-prefix=CHECK-SCO-HASQPX
 
 ; No combination of "powerpc64le-unknown-linux-gnu" + "CHECK-SCO", because
 ; only Power8 (and later) fully support LE.