allocatable registers are not supported.
Warning: So far it only works with the stack pointer on selected
-architectures (ARM, ARM64, x86_64 and AArch64). Significant amount of
+architectures (ARM, ARM64, AArch64, PowerPC and x86_64). Significant amount of
work is needed to support other registers and even more so, allocatable
registers.
#include "PPCTargetMachine.h"
#include "PPCTargetObjectFile.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringSwitch.h"
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
return FrameAddr;
}
+// FIXME? Maybe this could be a TableGen attribute on some registers and
+// this table could be generated automatically from RegInfo.
+unsigned PPCTargetLowering::getRegisterByName(const char* RegName,
+ EVT VT) const {
+ bool isPPC64 = PPCSubTarget.isPPC64();
+ bool isDarwinABI = PPCSubTarget.isDarwinABI();
+
+ if ((isPPC64 && VT != MVT::i64 && VT != MVT::i32) ||
+ (!isPPC64 && VT != MVT::i32))
+ report_fatal_error("Invalid register global variable type");
+
+ bool is64Bit = isPPC64 && VT == MVT::i64;
+ unsigned Reg = StringSwitch<unsigned>(RegName)
+ .Case("r1", is64Bit ? PPC::X1 : PPC::R1)
+ .Case("r2", isDarwinABI ? 0 : (is64Bit ? PPC::X2 : PPC::R2))
+ .Case("r13", (!isPPC64 && isDarwinABI) ? 0 :
+ (is64Bit ? PPC::X13 : PPC::R13))
+ .Default(0);
+
+ if (Reg)
+ return Reg;
+ report_fatal_error("Invalid register name global variable");
+}
+
bool
PPCTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
// The PowerPC target isn't yet aware of offsets.
SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
+ unsigned getRegisterByName(const char* RegName, EVT VT) const override;
+
void computeMaskedBitsForTargetNode(const SDValue Op,
APInt &KnownZero,
APInt &KnownOne,
--- /dev/null
+; RUN: not llc < %s -mtriple=powerpc-apple-darwin 2>&1 | FileCheck %s
+; RUN: not llc < %s -mtriple=powerpc-unknown-linux-gnu 2>&1 | FileCheck %s
+; RUN: not llc < %s -mtriple=powerpc64-unknown-linux-gnu 2>&1 | FileCheck %s
+
+define i32 @get_reg() nounwind {
+entry:
+; FIXME: Include an allocatable-specific error message
+; CHECK: Invalid register name global variable
+ %reg = call i32 @llvm.read_register.i32(metadata !0)
+ ret i32 %reg
+}
+
+declare i32 @llvm.read_register.i32(metadata) nounwind
+
+!0 = metadata !{metadata !"r0\00"}
--- /dev/null
+; RUN: llc < %s -mtriple=powerpc64-apple-darwin 2>&1 | FileCheck %s --check-prefix=CHECK-DARWIN
+; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu 2>&1 | FileCheck %s
+
+define i64 @get_reg() nounwind {
+entry:
+ %reg = call i64 @llvm.read_register.i64(metadata !0)
+ ret i64 %reg
+
+; CHECK-LABEL: @get_reg
+; CHECK: mr 3, 1
+
+; CHECK-DARWIN-LABEL: @get_reg
+; CHECK-DARWIN: mr r3, r1
+}
+
+declare i64 @llvm.read_register.i64(metadata) nounwind
+
+!0 = metadata !{metadata !"r1\00"}
--- /dev/null
+; RUN: llc < %s -mtriple=powerpc-apple-darwin 2>&1 | FileCheck %s --check-prefix=CHECK-DARWIN
+; RUN: llc < %s -mtriple=powerpc64-apple-darwin 2>&1 | FileCheck %s --check-prefix=CHECK-DARWIN
+; RUN: llc < %s -mtriple=powerpc-unknown-linux-gnu 2>&1 | FileCheck %s
+; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu 2>&1 | FileCheck %s
+
+define i32 @get_reg() nounwind {
+entry:
+ %reg = call i32 @llvm.read_register.i32(metadata !0)
+ ret i32 %reg
+
+; CHECK-LABEL: @get_reg
+; CHECK: mr 3, 1
+
+; CHECK-DARWIN-LABEL: @get_reg
+; CHECK-DARWIN: mr r3, r1
+}
+
+declare i32 @llvm.read_register.i32(metadata) nounwind
+
+!0 = metadata !{metadata !"r1\00"}
--- /dev/null
+; RUN: llc < %s -mtriple=powerpc64-apple-darwin 2>&1 | FileCheck %s --check-prefix=CHECK-DARWIN
+; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu 2>&1 | FileCheck %s
+
+define i64 @get_reg() nounwind {
+entry:
+ %reg = call i64 @llvm.read_register.i64(metadata !0)
+ ret i64 %reg
+
+; CHECK-LABEL: @get_reg
+; CHECK: mr 3, 13
+
+; CHECK-DARWIN-LABEL: @get_reg
+; CHECK-DARWIN: mr r3, r13
+}
+
+declare i64 @llvm.read_register.i64(metadata) nounwind
+
+!0 = metadata !{metadata !"r13\00"}
--- /dev/null
+; RUN: not llc < %s -mtriple=powerpc-apple-darwin 2>&1 | FileCheck %s --check-prefix=CHECK-DARWIN
+; RUN: llc < %s -mtriple=powerpc-unknown-linux-gnu 2>&1 | FileCheck %s
+; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu 2>&1 | FileCheck %s
+
+define i32 @get_reg() nounwind {
+entry:
+; FIXME: Include an allocatable-specific error message
+; CHECK-DARWIN: Invalid register name global variable
+ %reg = call i32 @llvm.read_register.i32(metadata !0)
+ ret i32 %reg
+
+; CHECK-LABEL: @get_reg
+; CHECK: mr 3, 13
+}
+
+declare i32 @llvm.read_register.i32(metadata) nounwind
+
+!0 = metadata !{metadata !"r13\00"}
--- /dev/null
+; RUN: not llc < %s -mtriple=powerpc64-apple-darwin 2>&1 | FileCheck %s --check-prefix=CHECK-DARWIN
+; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu 2>&1 | FileCheck %s
+
+define i64 @get_reg() nounwind {
+entry:
+; FIXME: Include an allocatable-specific error message
+; CHECK-DARWIN: Invalid register name global variable
+ %reg = call i64 @llvm.read_register.i64(metadata !0)
+ ret i64 %reg
+
+; CHECK-LABEL: @get_reg
+; CHECK: mr 3, 2
+}
+
+declare i64 @llvm.read_register.i64(metadata) nounwind
+
+!0 = metadata !{metadata !"r2\00"}
--- /dev/null
+; RUN: not llc < %s -mtriple=powerpc-apple-darwin 2>&1 | FileCheck %s --check-prefix=CHECK-DARWIN
+; RUN: llc < %s -mtriple=powerpc-unknown-linux-gnu 2>&1 | FileCheck %s
+; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu 2>&1 | FileCheck %s
+
+define i32 @get_reg() nounwind {
+entry:
+; FIXME: Include an allocatable-specific error message
+; CHECK-DARWIN: Invalid register name global variable
+ %reg = call i32 @llvm.read_register.i32(metadata !0)
+ ret i32 %reg
+
+; CHECK-LABEL: @get_reg
+; CHECK: mr 3, 2
+}
+
+declare i32 @llvm.read_register.i32(metadata) nounwind
+
+!0 = metadata !{metadata !"r2\00"}