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[AArch64] Remove check for Darwin that was needed to decide if x18 should

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be reserved.

The decision to reserve x18 is going to be made solely by the front-end,
so it isn't necessary to check if the OS is Darwin in the backend.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243308 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2015-07-27 19:18:47 +00:00
parent eb30d38ac8
commit 6e208e96cc
3 changed files with 10 additions and 12 deletions
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16
lib/Target/AArch64/AArch64RegisterInfo.cpp
View File

@ -100,7 +100,7 @@ AArch64RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
Reserved.set(AArch64::W29);
}
if (TT.isOSDarwin() || MF.getSubtarget<AArch64Subtarget>().isX18Reserved()) {
if (MF.getSubtarget<AArch64Subtarget>().isX18Reserved()) {
Reserved.set(AArch64::X18); // Platform register
Reserved.set(AArch64::W18);
}
@ -127,8 +127,7 @@ bool AArch64RegisterInfo::isReservedReg(const MachineFunction &MF,
return true;
case AArch64::X18:
case AArch64::W18:
return TT.isOSDarwin() ||
MF.getSubtarget<AArch64Subtarget>().isX18Reserved();
return MF.getSubtarget<AArch64Subtarget>().isX18Reserved();
case AArch64::FP:
case AArch64::W29:
return TFI->hasFP(MF) || TT.isOSDarwin();
@ -398,12 +397,11 @@ unsigned AArch64RegisterInfo::getRegPressureLimit(const TargetRegisterClass *RC,
case AArch64::GPR64RegClassID:
case AArch64::GPR32commonRegClassID:
case AArch64::GPR64commonRegClassID:
return 32 - 1 // XZR/SP
- (TFI->hasFP(MF) || TT.isOSDarwin()) // FP
- (TT.isOSDarwin() ||
MF.getSubtarget<AArch64Subtarget>()
.isX18Reserved()) // X18 reserved as platform register
- hasBasePointer(MF); // X19
return 32 - 1 // XZR/SP
- (TFI->hasFP(MF) || TT.isOSDarwin()) // FP
- MF.getSubtarget<AArch64Subtarget>()
.isX18Reserved() // X18 reserved as platform register
- hasBasePointer(MF); // X19
case AArch64::FPR8RegClassID:
case AArch64::FPR16RegClassID:
case AArch64::FPR32RegClassID:

2
test/CodeGen/AArch64/arm64-platform-reg.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -mtriple=arm64-apple-ios -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE-X18
; RUN: llc -mtriple=arm64-apple-ios -mattr=+reserve-x18 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE-X18
; RUN: llc -mtriple=arm64-freebsd-gnu -mattr=+reserve-x18 -o - %s | FileCheck %s --check-prefix=CHECK-RESERVE-X18
; RUN: llc -mtriple=arm64-linux-gnu -o - %s | FileCheck %s

4
test/CodeGen/AArch64/arm64-stackmap.ll
View File

@ -1,5 +1,5 @@
; RUN: llc -mtriple=arm64-apple-darwin < %s | FileCheck %s
; RUN: llc -mtriple=arm64-apple-darwin -fast-isel -fast-isel-abort=1 < %s | FileCheck %s
; RUN: llc -mtriple=arm64-apple-darwin -mattr=+reserve-x18 < %s | FileCheck %s
; RUN: llc -mtriple=arm64-apple-darwin -mattr=+reserve-x18 -fast-isel -fast-isel-abort=1 < %s | FileCheck %s
;
; Note: Print verbose stackmaps using -debug-only=stackmaps.