Second attempt:

Massive check in. This changes the "-fast" flag to "-O#" in llc. If you want to
use the old behavior, the flag is -O0. This change allows for finer-grained
control over which optimizations are run at different -O levels.

Most of this work was pretty mechanical. The majority of the fixes came from
verifying that a "fast" variable wasn't used anymore. The JIT still uses a
"Fast" flag. I'll change the JIT with a follow-up patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70343 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/FrontendC++/2006-11-06-StackTrace.cpp b/test/FrontendC++/2006-11-06-StackTrace.cpp
index 15c88df..f6a4428 100644
--- a/test/FrontendC++/2006-11-06-StackTrace.cpp
+++ b/test/FrontendC++/2006-11-06-StackTrace.cpp
@@ -1,7 +1,7 @@
 // This is a regression test on debug info to make sure that we can get a
 // meaningful stack trace from a C++ program.
 // RUN: %llvmgcc -S -O0 -g %s -o - | llvm-as | \
-// RUN:    llc --disable-fp-elim -o %t.s -f -fast -relocation-model=pic
+// RUN:    llc --disable-fp-elim -o %t.s -f -O0 -relocation-model=pic
 // RUN: %compile_c %t.s -o %t.o
 // RUN: %link %t.o -o %t.exe
 // RUN: echo {break DeepStack::deepest\nrun 17\nwhere\n} > %t.in 
diff --git a/test/FrontendC++/2006-11-30-Pubnames.cpp b/test/FrontendC++/2006-11-30-Pubnames.cpp
index b53d6aa..8102713 100644
--- a/test/FrontendC++/2006-11-30-Pubnames.cpp
+++ b/test/FrontendC++/2006-11-30-Pubnames.cpp
@@ -1,7 +1,7 @@
 // This is a regression test on debug info to make sure that we can access 
 // qualified global names.
 // RUN: %llvmgcc -S -O0 -g %s -o - | llvm-as | \
-// RUN:   llc --disable-fp-elim -o %t.s -f -fast
+// RUN:   llc --disable-fp-elim -o %t.s -f -O0
 // RUN: %compile_c %t.s -o %t.o
 // RUN: %link %t.o -o %t.exe
 // RUN: %llvmdsymutil %t.exe 
diff --git a/test/FrontendC++/2009-04-21-DtorNames-dbg.cpp b/test/FrontendC++/2009-04-21-DtorNames-dbg.cpp
index 4bd8e77..dfc607e 100644
--- a/test/FrontendC++/2009-04-21-DtorNames-dbg.cpp
+++ b/test/FrontendC++/2009-04-21-DtorNames-dbg.cpp
@@ -1,4 +1,4 @@
-// RUN: %llvmgcc -c -g %s -o - | llc -fast -f -o %t.s
+// RUN: %llvmgcc -c -g %s -o - | llc -O0 -f -o %t.s
 // RUN: %compile_c %t.s -o %t.o
 // PR4025