mirror of
https://github.com/RPCS3/llvm.git
synced 2026-07-19 23:23:38 -04:00
[Mips] Emit proper ABI for _mcount calls
When -pg option is present than a call to _mcount is inserted into every function. However since the proper ABI was not followed then the generated gmon.out did not give proper results. By inserting needed instructions before every _mcount we can fix this. Differential Revision: https://reviews.llvm.org/D68390 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@374055 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mirko Brkusanin
@@ -124,6 +124,33 @@ bool MipsSEDAGToDAGISel::replaceUsesWithZeroReg(MachineRegisterInfo *MRI,
|
||||
return true;
|
||||
}
|
||||
|
||||
void MipsSEDAGToDAGISel::emitMCountABI(MachineInstr &MI, MachineBasicBlock &MBB,
|
||||
MachineFunction &MF) {
|
||||
MachineInstrBuilder MIB(MF, &MI);
|
||||
if (!Subtarget->isABI_O32()) { // N32, N64
|
||||
// Save current return address.
|
||||
BuildMI(MBB, &MI, MI.getDebugLoc(), TII->get(Mips::OR))
|
||||
.addDef(Mips::AT_64)
|
||||
.addUse(Mips::RA_64)
|
||||
.addUse(Mips::ZERO_64);
|
||||
// Stops instruction above from being removed later on.
|
||||
MIB.addUse(Mips::AT_64, RegState::Implicit);
|
||||
} else { // O32
|
||||
// Save current return address.
|
||||
BuildMI(MBB, &MI, MI.getDebugLoc(), TII->get(Mips::OR))
|
||||
.addDef(Mips::AT)
|
||||
.addUse(Mips::RA)
|
||||
.addUse(Mips::ZERO);
|
||||
// _mcount pops 2 words from stack.
|
||||
BuildMI(MBB, &MI, MI.getDebugLoc(), TII->get(Mips::ADDiu))
|
||||
.addDef(Mips::SP)
|
||||
.addUse(Mips::SP)
|
||||
.addImm(-8);
|
||||
// Stops first instruction above from being removed later on.
|
||||
MIB.addUse(Mips::AT, RegState::Implicit);
|
||||
}
|
||||
}
|
||||
|
||||
void MipsSEDAGToDAGISel::processFunctionAfterISel(MachineFunction &MF) {
|
||||
MF.getInfo<MipsFunctionInfo>()->initGlobalBaseReg();
|
||||
|
||||
@@ -150,6 +177,24 @@ void MipsSEDAGToDAGISel::processFunctionAfterISel(MachineFunction &MF) {
|
||||
if (Subtarget->isABI_FPXX() && !Subtarget->hasMTHC1())
|
||||
MI.addOperand(MachineOperand::CreateReg(Mips::SP, false, true));
|
||||
break;
|
||||
case Mips::JAL:
|
||||
case Mips::JAL_MM:
|
||||
if (MI.getOperand(0).isGlobal() &&
|
||||
MI.getOperand(0).getGlobal()->getGlobalIdentifier() == "_mcount")
|
||||
emitMCountABI(MI, MBB, MF);
|
||||
break;
|
||||
case Mips::JALRPseudo:
|
||||
case Mips::JALR64Pseudo:
|
||||
case Mips::JALR16_MM:
|
||||
if (MI.getOperand(2).isMCSymbol() &&
|
||||
MI.getOperand(2).getMCSymbol()->getName() == "_mcount")
|
||||
emitMCountABI(MI, MBB, MF);
|
||||
break;
|
||||
case Mips::JALR:
|
||||
if (MI.getOperand(3).isMCSymbol() &&
|
||||
MI.getOperand(3).getMCSymbol()->getName() == "_mcount")
|
||||
emitMCountABI(MI, MBB, MF);
|
||||
break;
|
||||
default:
|
||||
replaceUsesWithZeroReg(MRI, MI);
|
||||
}
|
||||
|
||||
@@ -128,6 +128,10 @@ private:
|
||||
|
||||
bool trySelect(SDNode *Node) override;
|
||||
|
||||
// Emits proper ABI for _mcount profiling calls.
|
||||
void emitMCountABI(MachineInstr &MI, MachineBasicBlock &MBB,
|
||||
MachineFunction &MF);
|
||||
|
||||
void processFunctionAfterISel(MachineFunction &MF) override;
|
||||
|
||||
bool SelectInlineAsmMemoryOperand(const SDValue &Op,
|
||||
|
||||
@@ -0,0 +1,117 @@
|
||||
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
||||
|
||||
; RUN: llc -march=mips < %s | FileCheck %s -check-prefix=MIPS32
|
||||
; RUN: llc -march=mips -relocation-model=pic < %s | FileCheck %s -check-prefix=MIPS32-PIC
|
||||
; RUN: llc -march=mips64 < %s | FileCheck %s -check-prefix=MIPS64
|
||||
; RUN: llc -march=mips64 -relocation-model=pic < %s | FileCheck %s -check-prefix=MIPS64-PIC
|
||||
; RUN: llc -march=mips -mattr=+micromips < %s | FileCheck %s -check-prefix=MIPS32-MM
|
||||
; RUN: llc -march=mips -relocation-model=pic -mattr=+micromips < %s | FileCheck %s -check-prefix=MIPS32-MM-PIC
|
||||
|
||||
; Test that checks ABI for _mcount calls.
|
||||
|
||||
; Function Attrs: noinline nounwind optnone
|
||||
define void @foo() #0 {
|
||||
; MIPS32-LABEL: foo:
|
||||
; MIPS32: # %bb.0: # %entry
|
||||
; MIPS32-NEXT: addiu $sp, $sp, -24
|
||||
; MIPS32-NEXT: .cfi_def_cfa_offset 24
|
||||
; MIPS32-NEXT: sw $ra, 20($sp) # 4-byte Folded Spill
|
||||
; MIPS32-NEXT: .cfi_offset 31, -4
|
||||
; MIPS32-NEXT: move $1, $ra
|
||||
; MIPS32-NEXT: jal _mcount
|
||||
; MIPS32-NEXT: addiu $sp, $sp, -8
|
||||
; MIPS32-NEXT: lw $ra, 20($sp) # 4-byte Folded Reload
|
||||
; MIPS32-NEXT: jr $ra
|
||||
; MIPS32-NEXT: addiu $sp, $sp, 24
|
||||
;
|
||||
; MIPS32-PIC-LABEL: foo:
|
||||
; MIPS32-PIC: # %bb.0: # %entry
|
||||
; MIPS32-PIC-NEXT: lui $2, %hi(_gp_disp)
|
||||
; MIPS32-PIC-NEXT: addiu $2, $2, %lo(_gp_disp)
|
||||
; MIPS32-PIC-NEXT: addiu $sp, $sp, -24
|
||||
; MIPS32-PIC-NEXT: .cfi_def_cfa_offset 24
|
||||
; MIPS32-PIC-NEXT: sw $ra, 20($sp) # 4-byte Folded Spill
|
||||
; MIPS32-PIC-NEXT: .cfi_offset 31, -4
|
||||
; MIPS32-PIC-NEXT: addu $gp, $2, $25
|
||||
; MIPS32-PIC-NEXT: lw $25, %call16(_mcount)($gp)
|
||||
; MIPS32-PIC-NEXT: move $1, $ra
|
||||
; MIPS32-PIC-NEXT: .reloc ($tmp0), R_MIPS_JALR, _mcount
|
||||
; MIPS32-PIC-NEXT: $tmp0:
|
||||
; MIPS32-PIC-NEXT: jalr $25
|
||||
; MIPS32-PIC-NEXT: addiu $sp, $sp, -8
|
||||
; MIPS32-PIC-NEXT: lw $ra, 20($sp) # 4-byte Folded Reload
|
||||
; MIPS32-PIC-NEXT: jr $ra
|
||||
; MIPS32-PIC-NEXT: addiu $sp, $sp, 24
|
||||
;
|
||||
; MIPS64-LABEL: foo:
|
||||
; MIPS64: # %bb.0: # %entry
|
||||
; MIPS64-NEXT: daddiu $sp, $sp, -16
|
||||
; MIPS64-NEXT: .cfi_def_cfa_offset 16
|
||||
; MIPS64-NEXT: sd $ra, 8($sp) # 8-byte Folded Spill
|
||||
; MIPS64-NEXT: .cfi_offset 31, -8
|
||||
; MIPS64-NEXT: or $1, $ra, $zero
|
||||
; MIPS64-NEXT: jal _mcount
|
||||
; MIPS64-NEXT: nop
|
||||
; MIPS64-NEXT: ld $ra, 8($sp) # 8-byte Folded Reload
|
||||
; MIPS64-NEXT: jr $ra
|
||||
; MIPS64-NEXT: daddiu $sp, $sp, 16
|
||||
;
|
||||
; MIPS64-PIC-LABEL: foo:
|
||||
; MIPS64-PIC: # %bb.0: # %entry
|
||||
; MIPS64-PIC-NEXT: daddiu $sp, $sp, -16
|
||||
; MIPS64-PIC-NEXT: .cfi_def_cfa_offset 16
|
||||
; MIPS64-PIC-NEXT: sd $ra, 8($sp) # 8-byte Folded Spill
|
||||
; MIPS64-PIC-NEXT: sd $gp, 0($sp) # 8-byte Folded Spill
|
||||
; MIPS64-PIC-NEXT: .cfi_offset 31, -8
|
||||
; MIPS64-PIC-NEXT: .cfi_offset 28, -16
|
||||
; MIPS64-PIC-NEXT: lui $1, %hi(%neg(%gp_rel(foo)))
|
||||
; MIPS64-PIC-NEXT: daddu $1, $1, $25
|
||||
; MIPS64-PIC-NEXT: daddiu $gp, $1, %lo(%neg(%gp_rel(foo)))
|
||||
; MIPS64-PIC-NEXT: ld $25, %call16(_mcount)($gp)
|
||||
; MIPS64-PIC-NEXT: or $1, $ra, $zero
|
||||
; MIPS64-PIC-NEXT: .reloc .Ltmp0, R_MIPS_JALR, _mcount
|
||||
; MIPS64-PIC-NEXT: .Ltmp0:
|
||||
; MIPS64-PIC-NEXT: jalr $25
|
||||
; MIPS64-PIC-NEXT: nop
|
||||
; MIPS64-PIC-NEXT: ld $gp, 0($sp) # 8-byte Folded Reload
|
||||
; MIPS64-PIC-NEXT: ld $ra, 8($sp) # 8-byte Folded Reload
|
||||
; MIPS64-PIC-NEXT: jr $ra
|
||||
; MIPS64-PIC-NEXT: daddiu $sp, $sp, 16
|
||||
;
|
||||
; MIPS32-MM-LABEL: foo:
|
||||
; MIPS32-MM: # %bb.0: # %entry
|
||||
; MIPS32-MM-NEXT: addiu $sp, $sp, -24
|
||||
; MIPS32-MM-NEXT: .cfi_def_cfa_offset 24
|
||||
; MIPS32-MM-NEXT: sw $ra, 20($sp) # 4-byte Folded Spill
|
||||
; MIPS32-MM-NEXT: .cfi_offset 31, -4
|
||||
; MIPS32-MM-NEXT: move $1, $ra
|
||||
; MIPS32-MM-NEXT: jal _mcount
|
||||
; MIPS32-MM-NEXT: addiu $sp, $sp, -8
|
||||
; MIPS32-MM-NEXT: lw $ra, 20($sp) # 4-byte Folded Reload
|
||||
; MIPS32-MM-NEXT: jr $ra
|
||||
; MIPS32-MM-NEXT: addiu $sp, $sp, 24
|
||||
;
|
||||
; MIPS32-MM-PIC-LABEL: foo:
|
||||
; MIPS32-MM-PIC: # %bb.0: # %entry
|
||||
; MIPS32-MM-PIC-NEXT: lui $2, %hi(_gp_disp)
|
||||
; MIPS32-MM-PIC-NEXT: addiu $2, $2, %lo(_gp_disp)
|
||||
; MIPS32-MM-PIC-NEXT: addiu $sp, $sp, -24
|
||||
; MIPS32-MM-PIC-NEXT: .cfi_def_cfa_offset 24
|
||||
; MIPS32-MM-PIC-NEXT: sw $ra, 20($sp) # 4-byte Folded Spill
|
||||
; MIPS32-MM-PIC-NEXT: .cfi_offset 31, -4
|
||||
; MIPS32-MM-PIC-NEXT: addu $2, $2, $25
|
||||
; MIPS32-MM-PIC-NEXT: lw $25, %call16(_mcount)($2)
|
||||
; MIPS32-MM-PIC-NEXT: move $gp, $2
|
||||
; MIPS32-MM-PIC-NEXT: move $1, $ra
|
||||
; MIPS32-MM-PIC-NEXT: .reloc ($tmp0), R_MICROMIPS_JALR, _mcount
|
||||
; MIPS32-MM-PIC-NEXT: $tmp0:
|
||||
; MIPS32-MM-PIC-NEXT: jalr $25
|
||||
; MIPS32-MM-PIC-NEXT: addiu $sp, $sp, -8
|
||||
; MIPS32-MM-PIC-NEXT: lw $ra, 20($sp) # 4-byte Folded Reload
|
||||
; MIPS32-MM-PIC-NEXT: jr $ra
|
||||
; MIPS32-MM-PIC-NEXT: addiu $sp, $sp, 24
|
||||
entry:
|
||||
ret void
|
||||
}
|
||||
|
||||
attributes #0 = { "instrument-function-entry-inlined"="_mcount" }
|
||||
Reference in New Issue
Block a user