Enable EHABI by default

After all hard work to implement the EHABI and with the test-suite
passing, it's time to turn it on by default and allow users to
disable it as a work-around while we fix the eventual bugs that show
up.

This commit also remove the -arm-enable-ehabi-descriptors, since we
want the tables to be printed every time the EHABI is turned on
for non-Darwin ARM targets.

Although MCJIT EHABI is not working yet (needs linking with the right
libraries), this commit also fixes some relocations on MCJIT regarding
the EH tables/lib calls, and update some tests to avoid using EH tables
when none are needed.

The EH tests in the test-suite that were previously disabled on ARM
now pass with these changes, so a follow-up commit on the test-suite
will re-enable them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200388 91177308-0d34-0410-b5e6-96231b3b80d8

test/ExecutionEngine/MCJIT/remote/Inputs/cross-module-b.ll

@@ -1,6 +1,6 @@
 declare i32 @FA()
 
-define i32 @FB() {
+define i32 @FB() nounwind {
   %r = call i32 @FA( )   ; <i32> [#uses=1]
   ret i32 %r
 }

test/ExecutionEngine/MCJIT/remote/Inputs/multi-module-b.ll

@@ -1,6 +1,6 @@
 declare i32 @FC()
 
-define i32 @FB() {
+define i32 @FB() nounwind {
   %r = call i32 @FC( )   ; <i32> [#uses=1]
   ret i32 %r
 }

test/ExecutionEngine/MCJIT/remote/Inputs/multi-module-c.ll

@@ -1,4 +1,4 @@
-define i32 @FC() {
+define i32 @FC() nounwind {
   ret i32 0
 }
 

test/ExecutionEngine/MCJIT/remote/cross-module-a.ll

@@ -2,12 +2,11 @@
 
 declare i32 @FB()
 
-define i32 @FA() {
+define i32 @FA() nounwind {
   ret i32 0
 }
 
-define i32 @main() {
+define i32 @main() nounwind {
   %r = call i32 @FB( )   ; <i32> [#uses=1]
   ret i32 %r
 }
-

test/ExecutionEngine/MCJIT/remote/multi-module-a.ll

@@ -2,7 +2,7 @@
 
 declare i32 @FB()
 
-define i32 @main() {
+define i32 @main() nounwind {
   %r = call i32 @FB( )   ; <i32> [#uses=1]
   ret i32 %r
 }

test/ExecutionEngine/MCJIT/remote/simpletest-remote.ll

@@ -1,10 +1,10 @@
 ; RUN: %lli_mcjit -remote-mcjit -mcjit-remote-process=lli-child-target%exeext %s > /dev/null
 
-define i32 @bar() {
+define i32 @bar() nounwind {
 	ret i32 0
 }
 
-define i32 @main() {
+define i32 @main() nounwind {
 	%r = call i32 @bar( )		; <i32> [#uses=1]
 	ret i32 %r
 }

test/ExecutionEngine/MCJIT/remote/test-data-align-remote.ll

@@ -3,7 +3,7 @@
 ; Check that a variable is always aligned as specified.
 
 @var = global i32 0, align 32
-define i32 @main() {
+define i32 @main() nounwind {
   %addr = ptrtoint i32* @var to i64
   %mask = and i64 %addr, 31
   %tst = icmp eq i64 %mask, 0

test/ExecutionEngine/MCJIT/remote/test-fp-no-external-funcs-remote.ll

@@ -1,6 +1,6 @@
 ; RUN: %lli_mcjit -remote-mcjit -mcjit-remote-process=lli-child-target%exeext %s > /dev/null
 
-define double @test(double* %DP, double %Arg) {
+define double @test(double* %DP, double %Arg) nounwind {
 	%D = load double* %DP		; <double> [#uses=1]
 	%V = fadd double %D, 1.000000e+00		; <double> [#uses=2]
 	%W = fsub double %V, %V		; <double> [#uses=3]
@@ -12,7 +12,7 @@ define double @test(double* %DP, double %Arg) {
 	ret double %Y
 }
 
-define i32 @main() {
+define i32 @main() nounwind {
 	%X = alloca double		; <double*> [#uses=2]
 	store double 0.000000e+00, double* %X
 	call double @test( double* %X, double 2.000000e+00 )		; <double>:1 [#uses=0]

test/ExecutionEngine/MCJIT/remote/test-global-init-nonzero-remote.ll

@@ -2,7 +2,7 @@
 
 @count = global i32 1, align 4
 
-define i32 @main() nounwind uwtable {
+define i32 @main() nounwind {
 entry:
   %retval = alloca i32, align 4
   %i = alloca i32, align 4