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llvm-mirror/test/CodeGen/SPARC/sjlj.ll
Chris Dewhurst 7a66203c71 [Sparc] Implement __builtin_setjmp, __builtin_longjmp back-end.
This code implements builtin_setjmp and builtin_longjmp exception handling intrinsics for 32-bit Sparc back-ends.

The code started as a mash-up of the PowerPC and X86 versions, although there are sufficient differences to both that had to be made for Sparc handling.

Note: I have manual tests running. I'll work on a unit test and add that to the rest of this diff in the next day.

Also, this implementation is only for 32-bit Sparc. I haven't focussed on a 64-bit version, although I have left the code in a prepared state for implementing this, including detecting pointer size and comments indicating where I suspect there may be differences.

Differential Revision: http://reviews.llvm.org/D19798

llvm-svn: 268483
2016-05-04 09:33:30 +00:00

89 lines
2.8 KiB
LLVM
Executable File

; RUN: llc < %s -march=sparc | FileCheck %s
; RUN: llc < %s -march=sparc -mcpu=leon2 | FileCheck %s
; RUN: llc < %s -march=sparc -mcpu=leon3 | FileCheck %s
; RUN: llc < %s -march=sparc -mcpu=leon4 | FileCheck %s
%struct.__jmp_buf_tag = type { [64 x i64], i32, %struct.__sigset_t, [8 x i8] }
%struct.__sigset_t = type { [16 x i64] }
@env_sigill = internal global [1 x %struct.__jmp_buf_tag] zeroinitializer, align 16
define void @foo() #0 {
entry:
call void @llvm.eh.sjlj.longjmp(i8* bitcast ([1 x %struct.__jmp_buf_tag]* @env_sigill to i8*))
unreachable
; CHECK: @foo
; CHECK: ta 3
; CHECK: ld [%i0], %fp
; CHECK: ld [%i0+4], %i1
; CHECK: ld [%i0+8], %sp
; CHECK: jmp %i1
; CHECK: ld [%i0+12], %i7
return: ; No predecessors!
ret void
}
declare void @llvm.eh.sjlj.longjmp(i8*) #1
define signext i32 @main() #0 {
entry:
%retval = alloca i32, align 4
store i32 0, i32* %retval
%0 = call i8* @llvm.frameaddress(i32 0)
store i8* %0, i8** bitcast ([1 x %struct.__jmp_buf_tag]* @env_sigill to i8**)
%1 = call i8* @llvm.stacksave()
store i8* %1, i8** getelementptr (i8*, i8** bitcast ([1 x %struct.__jmp_buf_tag]* @env_sigill to i8**), i32 2)
%2 = call i32 @llvm.eh.sjlj.setjmp(i8* bitcast ([1 x %struct.__jmp_buf_tag]* @env_sigill to i8*))
%tobool = icmp ne i32 %2, 0
br i1 %tobool, label %if.then, label %if.else
if.then: ; preds = %entry
store i32 1, i32* %retval
br label %return
if.else: ; preds = %entry
call void @foo()
br label %if.end
if.end: ; preds = %if.else
store i32 0, i32* %retval
br label %return
return: ; preds = %if.end, %if.then
%3 = load i32, i32* %retval
ret i32 %3
; CHECK: @main
; CHECK: st %fp, [%i0]
; CHECK: sethi %hi(.LBB1_2), %i1
; CHECK: or %i1, %lo(.LBB1_2), %i1
; CHECK: st %i1, [%i0+4]
; CHECK: st %sp, [%i0+8]
; CHECK: bn .LBB1_2
; CHECK: st %i7, [%i0+12]
; CHECK: ba .LBB1_1
; CHECK: nop
; CHECK:.LBB1_1: ! %entry
; CHECK: ba .LBB1_3
; CHECK: mov %g0, %i0
; CHECK:.LBB1_2: ! Block address taken
; CHECK: mov 1, %i0
; CHECK:.LBB1_3: ! %entry
; CHECK: cmp %i0, 0
; CHECK: be .LBB1_5
; CHECK: nop
}
declare i8* @llvm.frameaddress(i32) #2
declare i8* @llvm.stacksave() #3
declare i32 @llvm.eh.sjlj.setjmp(i8*) #3
attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { noreturn nounwind }
attributes #2 = { nounwind readnone }
attributes #3 = { nounwind }