// FIXME: Handle more intrinsics.
switch (I.getIntrinsicID()) {
default: return false;
+ case Intrinsic::frameaddress: {
+ MachineFrameInfo *MFI = FuncInfo.MF->getFrameInfo();
+ MFI->setFrameAddressIsTaken(true);
+
+ unsigned LdrOpc;
+ const TargetRegisterClass *RC;
+ if (isThumb2) {
+ LdrOpc = ARM::t2LDRi12;
+ RC = (const TargetRegisterClass*)&ARM::tGPRRegClass;
+ } else {
+ LdrOpc = ARM::LDRi12;
+ RC = (const TargetRegisterClass*)&ARM::GPRRegClass;
+ }
+
+ const ARMBaseRegisterInfo *RegInfo =
+ static_cast<const ARMBaseRegisterInfo*>(TM.getRegisterInfo());
+ unsigned FramePtr = RegInfo->getFrameRegister(*(FuncInfo.MF));
+ unsigned SrcReg = FramePtr;
+
+ // Recursively load frame address
+ // ldr r0 [fp]
+ // ldr r0 [r0]
+ // ldr r0 [r0]
+ // ...
+ unsigned DestReg;
+ unsigned Depth = cast<ConstantInt>(I.getOperand(0))->getZExtValue();
+ while (Depth--) {
+ DestReg = createResultReg(RC);
+ AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
+ TII.get(LdrOpc), DestReg)
+ .addReg(SrcReg).addImm(0));
+ SrcReg = DestReg;
+ }
+ UpdateValueMap(&I, DestReg);
+ return true;
+ }
case Intrinsic::memcpy:
case Intrinsic::memmove: {
const MemTransferInst &MTI = cast<MemTransferInst>(I);
--- /dev/null
+; RUN: llc < %s -O0 -fast-isel-abort -mtriple=armv7-apple-darwin | FileCheck %s --check-prefix=DARWIN-ARM
+; RUN: llc < %s -O0 -fast-isel-abort -mtriple=armv7-linux-gnueabi | FileCheck %s --check-prefix=LINUX-ARM
+; RUN: llc < %s -O0 -fast-isel-abort -mtriple=thumbv7-apple-darwin | FileCheck %s --check-prefix=DARWIN-THUMB2
+; RUN: llc < %s -O0 -fast-isel-abort -mtriple=thumbv7-linux-gnueabi | FileCheck %s --check-prefix=LINUX-THUMB2
+
+define i8* @frameaddr_index0() nounwind {
+entry:
+; DARWIN-ARM: frameaddr_index0:
+; DARWIN-ARM: push {r7}
+; DARWIN-ARM: mov r7, sp
+; DARWIN-ARM: mov r0, r7
+
+; DARWIN-THUMB2: frameaddr_index0:
+; DARWIN-THUMB2: str r7, [sp, #-4]!
+; DARWIN-THUMB2: mov r7, sp
+; DARWIN-THUMB2: mov r0, r7
+
+; LINUX-ARM: frameaddr_index0:
+; LINUX-ARM: push {r11}
+; LINUX-ARM: mov r11, sp
+; LINUX-ARM: mov r0, r11
+
+; LINUX-THUMB2: frameaddr_index0:
+; LINUX-THUMB2: str r7, [sp, #-4]!
+; LINUX-THUMB2: mov r7, sp
+; LINUX-THUMB2: mov r0, r7
+
+ %0 = call i8* @llvm.frameaddress(i32 0)
+ ret i8* %0
+}
+
+define i8* @frameaddr_index1() nounwind {
+entry:
+; DARWIN-ARM: frameaddr_index1:
+; DARWIN-ARM: push {r7}
+; DARWIN-ARM: mov r7, sp
+; DARWIN-ARM: mov r0, r7
+; DARWIN-ARM: ldr r0, [r0]
+
+; DARWIN-THUMB2: frameaddr_index1:
+; DARWIN-THUMB2: str r7, [sp, #-4]!
+; DARWIN-THUMB2: mov r7, sp
+; DARWIN-THUMB2: mov r0, r7
+; DARWIN-THUMB2: ldr r0, [r0]
+
+; LINUX-ARM: frameaddr_index1:
+; LINUX-ARM: push {r11}
+; LINUX-ARM: mov r11, sp
+; LINUX-ARM: mov r0, r11
+; LINUX-ARM: ldr r0, [r0]
+
+; LINUX-THUMB2: frameaddr_index1:
+; LINUX-THUMB2: str r7, [sp, #-4]!
+; LINUX-THUMB2: mov r7, sp
+; LINUX-THUMB2: mov r0, r7
+; LINUX-THUMB2: ldr r0, [r0]
+
+ %0 = call i8* @llvm.frameaddress(i32 1)
+ ret i8* %0
+}
+
+define i8* @frameaddr_index3() nounwind {
+entry:
+; DARWIN-ARM: frameaddr_index3:
+; DARWIN-ARM: push {r7}
+; DARWIN-ARM: mov r7, sp
+; DARWIN-ARM: mov r0, r7
+; DARWIN-ARM: ldr r0, [r0]
+; DARWIN-ARM: ldr r0, [r0]
+; DARWIN-ARM: ldr r0, [r0]
+
+; DARWIN-THUMB2: frameaddr_index3:
+; DARWIN-THUMB2: str r7, [sp, #-4]!
+; DARWIN-THUMB2: mov r7, sp
+; DARWIN-THUMB2: mov r0, r7
+; DARWIN-THUMB2: ldr r0, [r0]
+; DARWIN-THUMB2: ldr r0, [r0]
+; DARWIN-THUMB2: ldr r0, [r0]
+
+; LINUX-ARM: frameaddr_index3:
+; LINUX-ARM: push {r11}
+; LINUX-ARM: mov r11, sp
+; LINUX-ARM: mov r0, r11
+; LINUX-ARM: ldr r0, [r0]
+; LINUX-ARM: ldr r0, [r0]
+; LINUX-ARM: ldr r0, [r0]
+
+; LINUX-THUMB2: frameaddr_index3:
+; LINUX-THUMB2: str r7, [sp, #-4]!
+; LINUX-THUMB2: mov r7, sp
+; LINUX-THUMB2: mov r0, r7
+; LINUX-THUMB2: ldr r0, [r0]
+; LINUX-THUMB2: ldr r0, [r0]
+; LINUX-THUMB2: ldr r0, [r0]
+
+ %0 = call i8* @llvm.frameaddress(i32 3)
+ ret i8* %0
+}
+
+declare i8* @llvm.frameaddress(i32) nounwind readnone