2009-09-09 08:09:15 +08:00
|
|
|
; RUN: llc < %s -march=arm
|
|
|
|
; RUN: llc < %s -mtriple=arm-linux-gnueabi | grep mov | count 1
|
|
|
|
; RUN: llc < %s -mtriple=arm-linux-gnu --disable-fp-elim | \
|
Fix epilogue codegen to avoid leaving the stack pointer in an invalid
state. Previously Thumb2 would restore sp from fp like this:
mov sp, r7
sub, sp, #4
If an interrupt is taken after the 'mov' but before the 'sub', callee-saved
registers might be clobbered by the interrupt handler. Instead, try
restoring directly from sp:
add sp, #4
Or, if necessary (with VLA, etc.) use a scratch register to compute sp and
then restore it:
sub.w r4, r7, #8
mov sp, r7
rdar://8465407
llvm-svn: 119977
2010-11-23 02:12:04 +08:00
|
|
|
; RUN: grep mov | count 2
|
2009-11-22 07:34:09 +08:00
|
|
|
; RUN: llc < %s -mtriple=arm-apple-darwin | grep mov | count 2
|
2006-08-04 20:48:42 +08:00
|
|
|
|
2007-02-01 06:27:07 +08:00
|
|
|
@str = internal constant [12 x i8] c"Hello World\00"
|
2006-08-04 20:48:42 +08:00
|
|
|
|
2007-02-01 06:27:07 +08:00
|
|
|
define i32 @main() {
|
|
|
|
%tmp = call i32 @puts( i8* getelementptr ([12 x i8]* @str, i32 0, i64 0) ) ; <i32> [#uses=0]
|
|
|
|
ret i32 0
|
2006-08-04 20:48:42 +08:00
|
|
|
}
|
|
|
|
|
2007-02-01 06:27:07 +08:00
|
|
|
declare i32 @puts(i8*)
|