mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-14 11:32:34 +00:00
7c2ef822f7
Summary:
RET, and RET_MM have been replaced by a pseudo named PseudoReturn.
In addition a version with a 64-bit GPR named PseudoReturn64 has been
added.
Instruction selection for a return matches RetRA, which is expanded post
register allocation to PseudoReturn/PseudoReturn64. During MipsAsmPrinter,
this PseudoReturn/PseudoReturn64 are emitted as:
- (JALR64 $zero, $rs) on MIPS64r6
- (JALR $zero, $rs) on MIPS32r6
- (JR_MM $rs) on microMIPS
- (JR $rs) otherwise
On MIPS32r6/MIPS64r6, 'jr $rs' is an alias for 'jalr $zero, $rs'. To aid
development and review (specifically, to ensure all cases of jr are
updated), these aliases are temporarily named 'r6.jr' instead of 'jr'.
A follow up patch will change them back to the correct mnemonic.
Added (JALR $zero, $rs) to MipsNaClELFStreamer's definition of an indirect
jump, and removed it from its definition of a call.
Note: I haven't accounted for MIPS64 in MipsNaClELFStreamer since it's
doesn't appear to account for any MIPS64-specifics.
The return instruction created as part of eh_return expansion is now expanded
using expandRetRA() so we use the right return instruction on MIPS32r6/MIPS64r6
('jalr $zero, $rs').
Also, fixed a misuse of isABI_N64() to detect 64-bit wide registers in
expandEhReturn().
Reviewers: jkolek, vmedic, mseaborn, zoran.jovanovic, dsanders
Reviewed By: dsanders
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D4268
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212604 91177308-0d34-0410-b5e6-96231b3b80d8
90 lines
3.2 KiB
LLVM
90 lines
3.2 KiB
LLVM
; RUN: llc -march=mipsel -mcpu=mips32 -asm-show-inst < %s | FileCheck %s -check-prefix=CHECK -check-prefix=NOT-R6
|
|
; RUN: llc -march=mipsel -mcpu=mips32r2 -asm-show-inst < %s | FileCheck %s -check-prefix=CHECK -check-prefix=NOT-R6
|
|
; RUN: llc -march=mipsel -mcpu=mips32r6 -asm-show-inst < %s | FileCheck %s -check-prefix=CHECK -check-prefix=R6
|
|
|
|
declare void @llvm.eh.return.i32(i32, i8*)
|
|
declare void @foo(...)
|
|
|
|
define i8* @f1(i32 %offset, i8* %handler) {
|
|
entry:
|
|
call void (...)* @foo()
|
|
call void @llvm.eh.return.i32(i32 %offset, i8* %handler)
|
|
unreachable
|
|
|
|
; CHECK: f1:
|
|
; CHECK: addiu $sp, $sp, -[[spoffset:[0-9]+]]
|
|
|
|
; check that $a0-$a3 are saved on stack.
|
|
; CHECK: sw $4, [[offset0:[0-9]+]]($sp)
|
|
; CHECK: sw $5, [[offset1:[0-9]+]]($sp)
|
|
; CHECK: sw $6, [[offset2:[0-9]+]]($sp)
|
|
; CHECK: sw $7, [[offset3:[0-9]+]]($sp)
|
|
|
|
; check that .cfi_offset directives are emitted for $a0-$a3.
|
|
; CHECK: .cfi_offset 4,
|
|
; CHECK: .cfi_offset 5,
|
|
; CHECK: .cfi_offset 6,
|
|
; CHECK: .cfi_offset 7,
|
|
|
|
; check that stack adjustment and handler are put in $v1 and $v0.
|
|
; CHECK: move $[[R0:[a-z0-9]+]], $5
|
|
; CHECK: move $[[R1:[a-z0-9]+]], $4
|
|
; CHECK: move $3, $[[R1]]
|
|
; CHECK: move $2, $[[R0]]
|
|
|
|
; check that $a0-$a3 are restored from stack.
|
|
; CHECK: lw $4, [[offset0]]($sp)
|
|
; CHECK: lw $5, [[offset1]]($sp)
|
|
; CHECK: lw $6, [[offset2]]($sp)
|
|
; CHECK: lw $7, [[offset3]]($sp)
|
|
|
|
; check that stack is adjusted by $v1 and that code returns to address in $v0
|
|
; also check that $25 contains handler value
|
|
; CHECK: addiu $sp, $sp, [[spoffset]]
|
|
; CHECK: move $25, $2
|
|
; CHECK: move $ra, $2
|
|
; NOT-R6: jr $ra # <MCInst #{{[0-9]+}} JR
|
|
; R6: jr $ra # <MCInst #{{[0-9]+}} JALR
|
|
; CHECK: addu $sp, $sp, $3
|
|
}
|
|
|
|
define i8* @f2(i32 %offset, i8* %handler) {
|
|
entry:
|
|
call void @llvm.eh.return.i32(i32 %offset, i8* %handler)
|
|
unreachable
|
|
|
|
; CHECK: f2:
|
|
; CHECK: addiu $sp, $sp, -[[spoffset:[0-9]+]]
|
|
|
|
; check that $a0-$a3 are saved on stack.
|
|
; CHECK: sw $4, [[offset0:[0-9]+]]($sp)
|
|
; CHECK: sw $5, [[offset1:[0-9]+]]($sp)
|
|
; CHECK: sw $6, [[offset2:[0-9]+]]($sp)
|
|
; CHECK: sw $7, [[offset3:[0-9]+]]($sp)
|
|
|
|
; check that .cfi_offset directives are emitted for $a0-$a3.
|
|
; CHECK: .cfi_offset 4,
|
|
; CHECK: .cfi_offset 5,
|
|
; CHECK: .cfi_offset 6,
|
|
; CHECK: .cfi_offset 7,
|
|
|
|
; check that stack adjustment and handler are put in $v1 and $v0.
|
|
; CHECK: move $3, $4
|
|
; CHECK: move $2, $5
|
|
|
|
; check that $a0-$a3 are restored from stack.
|
|
; CHECK: lw $4, [[offset0]]($sp)
|
|
; CHECK: lw $5, [[offset1]]($sp)
|
|
; CHECK: lw $6, [[offset2]]($sp)
|
|
; CHECK: lw $7, [[offset3]]($sp)
|
|
|
|
; check that stack is adjusted by $v1 and that code returns to address in $v0
|
|
; also check that $25 contains handler value
|
|
; CHECK: addiu $sp, $sp, [[spoffset]]
|
|
; CHECK: move $25, $2
|
|
; CHECK: move $ra, $2
|
|
; NOT-R6: jr $ra # <MCInst #{{[0-9]+}} JR
|
|
; R6: jr $ra # <MCInst #{{[0-9]+}} JALR
|
|
; CHECK: addu $sp, $sp, $3
|
|
}
|