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Add Thumb2 pc relative add.

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llvm-svn: 74141
This commit is contained in:
Evan Cheng 2009-06-24 23:47:58 +00:00
parent a21f94d6ba
commit e8c58ee743
4 changed files with 98 additions and 1 deletions
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2
lib/Target/ARM/ARMInstrThumb.td
View File

@ -128,7 +128,7 @@ PseudoInst<(outs), (ins i32imm:$amt),
}
let isNotDuplicable = 1 in
def tPICADD : TIt<(outs tGPR:$dst), (ins tGPR:$lhs, pclabel:$cp),
def tPICADD : T1It<(outs tGPR:$dst), (ins tGPR:$lhs, pclabel:$cp),
"$cp:\n\tadd $dst, pc",
[(set tGPR:$dst, (ARMpic_add tGPR:$lhs, imm:$cp))]>;

33
lib/Target/ARM/ARMInstrThumb2.td
View File

@ -314,6 +314,33 @@ multiclass T2I_cmp_is<string opc, PatFrag opnode> {
}
}
//===----------------------------------------------------------------------===//
// Miscellaneous Instructions.
//
let isNotDuplicable = 1 in
def t2PICADD : T2I<(outs tGPR:$dst), (ins tGPR:$lhs, pclabel:$cp),
"$cp:\n\tadd $dst, pc",
[(set tGPR:$dst, (ARMpic_add tGPR:$lhs, imm:$cp))]>;
// LEApcrel - Load a pc-relative address into a register without offending the
// assembler.
def t2LEApcrel : T2I<(outs GPR:$dst), (ins i32imm:$label, pred:$p),
!strconcat(!strconcat(".set PCRELV${:uid}, ($label-(",
"${:private}PCRELL${:uid}+8))\n"),
!strconcat("${:private}PCRELL${:uid}:\n\t",
"add$p $dst, pc, #PCRELV${:uid}")),
[]>;
def t2LEApcrelJT : T2I<(outs GPR:$dst),
(ins i32imm:$label, i32imm:$id, pred:$p),
!strconcat(!strconcat(".set PCRELV${:uid}, (${label}_${id:no_hash}-(",
"${:private}PCRELL${:uid}+8))\n"),
!strconcat("${:private}PCRELL${:uid}:\n\t",
"add$p $dst, pc, #PCRELV${:uid}")),
[]>;
//===----------------------------------------------------------------------===//
// Arithmetic Instructions.
//
@ -493,6 +520,12 @@ def : Thumb2Pat<(ARMcmpNZ GPR:$src, t2_so_imm_neg:$imm),
// Non-Instruction Patterns
//
// ConstantPool, GlobalAddress, and JumpTable
def : Thumb2Pat<(ARMWrapper tglobaladdr :$dst), (t2LEApcrel tglobaladdr :$dst)>;
def : Thumb2Pat<(ARMWrapper tconstpool :$dst), (t2LEApcrel tconstpool :$dst)>;
def : Thumb2Pat<(ARMWrapperJT tjumptable:$dst, imm:$id),
(t2LEApcrelJT tjumptable:$dst, imm:$id)>;
// Large immediate handling.
def : Thumb2Pat<(i32 imm:$src),

9
test/CodeGen/Thumb2/load-global.ll Normal file
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@ -0,0 +1,9 @@
; RUN: llvm-as < %s | llc -mtriple=thumbv7-apple-darwin
; RUN: llvm-as < %s | llc -mtriple=thumbv7-apple-darwin -relocation-model=pic | grep add | grep pc
@G = external global i32
define i32 @test1() {
%tmp = load i32* @G
ret i32 %tmp
}

55
test/CodeGen/Thumb2/pic-jtbl.ll Normal file
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@ -0,0 +1,55 @@
; RUN: llvm-as < %s | llc -mtriple=thumbv7-apple-darwin -relocation-model=pic \
; RUN: -o %t -f
; RUN: grep add %t | grep pc
;; NOT YET: grep "add pc"
define void @bar(i32 %n.u) {
entry:
switch i32 %n.u, label %bb12 [i32 1, label %bb i32 2, label %bb6 i32 4, label %bb7 i32 5, label %bb8 i32 6, label %bb10 i32 7, label %bb1 i32 8, label %bb3 i32 9, label %bb4 i32 10, label %bb9 i32 11, label %bb2 i32 12, label %bb5 i32 13, label %bb11 ]
bb:
tail call void(...)* @foo1()
ret void
bb1:
tail call void(...)* @foo2()
ret void
bb2:
tail call void(...)* @foo6()
ret void
bb3:
tail call void(...)* @foo3()
ret void
bb4:
tail call void(...)* @foo4()
ret void
bb5:
tail call void(...)* @foo5()
ret void
bb6:
tail call void(...)* @foo1()
ret void
bb7:
tail call void(...)* @foo2()
ret void
bb8:
tail call void(...)* @foo6()
ret void
bb9:
tail call void(...)* @foo3()
ret void
bb10:
tail call void(...)* @foo4()
ret void
bb11:
tail call void(...)* @foo5()
ret void
bb12:
tail call void(...)* @foo6()
ret void
}
declare void @foo1(...)
declare void @foo2(...)
declare void @foo6(...)
declare void @foo3(...)
declare void @foo4(...)
declare void @foo5(...)