Add a -regalloc=default option that chooses a register allocator based on the -O
optimization level.
This only really affects llc for now because both the llvm-gcc and clang front
ends override the default register allocator. I intend to remove that code later.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104904 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/ARM/2010-05-20-NEONSpillCrash.ll b/test/CodeGen/ARM/2010-05-20-NEONSpillCrash.ll
index b6fbf9b..ff60fa8 100644
--- a/test/CodeGen/ARM/2010-05-20-NEONSpillCrash.ll
+++ b/test/CodeGen/ARM/2010-05-20-NEONSpillCrash.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -march=arm -mattr=+neon -O0
+; RUN: llc < %s -march=arm -mattr=+neon -O0 -regalloc=linearscan
; This test would crash the rewriter when trying to handle a spill after one of
; the @llvm.arm.neon.vld3.v8i8 defined three parts of a register.
diff --git a/test/CodeGen/X86/2008-05-21-CoalescerBug.ll b/test/CodeGen/X86/2008-05-21-CoalescerBug.ll
index 9cf50f4..e5dda4a 100644
--- a/test/CodeGen/X86/2008-05-21-CoalescerBug.ll
+++ b/test/CodeGen/X86/2008-05-21-CoalescerBug.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -march=x86 -O0 -fast-isel=false | grep mov | count 5
+; RUN: llc < %s -march=x86 -O0 -fast-isel=false -regalloc=linearscan | grep mov | count 5
; PR2343
%llvm.dbg.anchor.type = type { i32, i32 }
diff --git a/test/CodeGen/X86/fast-isel-bc.ll b/test/CodeGen/X86/fast-isel-bc.ll
index f2696ce..8d7dc8f 100644
--- a/test/CodeGen/X86/fast-isel-bc.ll
+++ b/test/CodeGen/X86/fast-isel-bc.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -O0 -march=x86-64 -mattr=+mmx | FileCheck %s
+; RUN: llc < %s -O0 -regalloc=linearscan -march=x86-64 -mattr=+mmx | FileCheck %s
; PR4684
target datalayout =
diff --git a/test/CodeGen/X86/inline-asm-tied.ll b/test/CodeGen/X86/inline-asm-tied.ll
index 1f4a13f..cfa03bb 100644
--- a/test/CodeGen/X86/inline-asm-tied.ll
+++ b/test/CodeGen/X86/inline-asm-tied.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -mtriple=i386-apple-darwin9 -O0 | grep {movl %edx, 12(%esp)} | count 2
+; RUN: llc < %s -mtriple=i386-apple-darwin9 -O0 -regalloc=linearscan | grep {movl %edx, 12(%esp)} | count 2
; rdar://6992609
target triple = "i386-apple-darwin9.0"