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

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 [

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]

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'

test/CodeGen/PowerPC/cr_spilling.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc -march=ppc32 -regalloc=local -fast -relocation-model=pic -o -
+; RUN: llvm-as < %s | llc -march=ppc32 -regalloc=local -O0 -relocation-model=pic -o -
 ; PR1638
 
 @.str242 = external constant [3 x i8]		; <[3 x i8]*> [#uses=1]

test/CodeGen/X86/2008-04-15-LiveVariableBug.ll

@@ -1,5 +1,5 @@
 ; RUN: llvm-as < %s | llc -mtriple=x86_64-apple-darwin
-; RUN: llvm-as < %s | llc -mtriple=x86_64-apple-darwin -relocation-model=pic -disable-fp-elim -fast -regalloc=local
+; RUN: llvm-as < %s | llc -mtriple=x86_64-apple-darwin -relocation-model=pic -disable-fp-elim -O0 -regalloc=local
 
 	%struct.CGPoint = type { double, double }
 	%struct.NSArray = type { %struct.NSObject }

test/CodeGen/X86/2008-05-21-CoalescerBug.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc -march=x86 -fast -fast-isel=false | grep mov | count 5
+; RUN: llvm-as < %s | llc -march=x86 -O0 -fast-isel=false | grep mov | count 5
 ; PR2343
 
 	%llvm.dbg.anchor.type = type { i32, i32 }

test/CodeGen/X86/2009-03-23-LinearScanBug.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin -fast
+; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin -O0
 
 define fastcc void @optimize_bit_field() nounwind {
 bb4:

test/CodeGen/X86/2009-04-14-IllegalRegs.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin -fast -regalloc=local | not grep sil
+; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin -O0 -regalloc=local | not grep sil
 ; rdar://6787136
 
 	%struct.X = type { i8, [32 x i8] }

test/CodeGen/X86/add-with-overflow.ll

@@ -1,7 +1,7 @@
 ; RUN: llvm-as < %s | llc -march=x86 | grep {jo} | count 2
 ; RUN: llvm-as < %s | llc -march=x86 | grep {jb} | count 2
-; RUN: llvm-as < %s | llc -march=x86 -fast | grep {jo} | count 2
-; RUN: llvm-as < %s | llc -march=x86 -fast | grep {jb} | count 2
+; RUN: llvm-as < %s | llc -march=x86 -O0 | grep {jo} | count 2
+; RUN: llvm-as < %s | llc -march=x86 -O0 | grep {jb} | count 2
 
 @ok = internal constant [4 x i8] c"%d\0A\00"
 @no = internal constant [4 x i8] c"no\0A\00"

test/CodeGen/X86/fast-isel-bail.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc -march=x86 -fast
+; RUN: llvm-as < %s | llc -march=x86 -O0
 
 ; This file is for regression tests for cases where FastISel needs
 ; to gracefully bail out and let SelectionDAGISel take over.

test/CodeGen/X86/fast-isel-gep-sext.ll

@@ -1,5 +1,5 @@
-; RUN: llvm-as < %s | llc -march=x86-64 -fast | grep movslq
-; RUN: llvm-as < %s | llc -march=x86 -fast
+; RUN: llvm-as < %s | llc -march=x86-64 -O0 | grep movslq
+; RUN: llvm-as < %s | llc -march=x86 -O0
 ; PR3181
 
 ; GEP indices are interpreted as signed integers, so they

test/CodeGen/X86/fast-isel-shift-imm.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llc -march=x86 -fast | grep {sarl	\$80, %eax}
+; RUN: llvm-as < %s | llc -march=x86 -O0 | grep {sarl	\$80, %eax}
 ; PR3242
 
 define i32 @foo(i32 %x) nounwind {

test/CodeGen/X86/pr1489.ll

@@ -1,5 +1,5 @@
-; RUN: llvm-as < %s | llc -disable-fp-elim -fast -mcpu=i486 | grep 1082126238 | count 3
-; RUN: llvm-as < %s | llc -disable-fp-elim -fast -mcpu=i486 | grep 3058016715 | count 1
+; RUN: llvm-as < %s | llc -disable-fp-elim -O0 -mcpu=i486 | grep 1082126238 | count 3
+; RUN: llvm-as < %s | llc -disable-fp-elim -O0 -mcpu=i486 | grep 3058016715 | count 1
 ;; magic constants are 3.999f and half of 3.999
 ; ModuleID = '1489.c'
 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64"

test/CodeGen/X86/volatile.ll

@@ -1,5 +1,5 @@
 ; RUN: llvm-as < %s | llc -march=x86 -mattr=sse2 | grep movsd | count 5
-; RUN: llvm-as < %s | llc -march=x86 -mattr=sse2 -fast | grep movsd | count 5
+; RUN: llvm-as < %s | llc -march=x86 -mattr=sse2 -O0 | grep movsd | count 5
 
 @x = external global double