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/CodeGen/Generic/2006-06-12-LowerSwitchCrash.ll b/test/CodeGen/Generic/2006-06-12-LowerSwitchCrash.ll
index 47ee7c5..b644bd2 100644
--- a/test/CodeGen/Generic/2006-06-12-LowerSwitchCrash.ll
+++ b/test/CodeGen/Generic/2006-06-12-LowerSwitchCrash.ll
@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc -fast
+; RUN: llvm-as < %s | llc -O0
 
 define float @test(i32 %tmp12771278) {
         switch i32 %tmp12771278, label %bb1279 [
diff --git a/test/CodeGen/Generic/2006-06-13-ComputeMaskedBitsCrash.ll b/test/CodeGen/Generic/2006-06-13-ComputeMaskedBitsCrash.ll
index 920cf3c..1aa3c62 100644
--- a/test/CodeGen/Generic/2006-06-13-ComputeMaskedBitsCrash.ll
+++ b/test/CodeGen/Generic/2006-06-13-ComputeMaskedBitsCrash.ll
@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc -fast
+; RUN: llvm-as < %s | llc -O0
 	
 %struct.cl_perfunc_opts = type { i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i32, i32, i32, i32, i32, i32, i32 }
 @cl_pf_opts = external global %struct.cl_perfunc_opts		; <%struct.cl_perfunc_opts*> [#uses=2]
diff --git a/test/CodeGen/Generic/2007-04-13-SwitchLowerBadPhi.ll b/test/CodeGen/Generic/2007-04-13-SwitchLowerBadPhi.ll
index b95a361..1418bbf 100644
--- a/test/CodeGen/Generic/2007-04-13-SwitchLowerBadPhi.ll
+++ b/test/CodeGen/Generic/2007-04-13-SwitchLowerBadPhi.ll
@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc -fast
+; RUN: llvm-as < %s | llc -O0
 ; PR 1323
 
 ; ModuleID = 'test.bc'