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-rw-r--r--lib/Target/Mips/Mips16InstrInfo.cpp15
-rw-r--r--lib/Target/Mips/Mips16InstrInfo.h4
-rw-r--r--lib/Target/Mips/Mips16InstrInfo.td18
-rw-r--r--test/CodeGen/Mips/seleq.ll95
4 files changed, 129 insertions, 3 deletions
diff --git a/lib/Target/Mips/Mips16InstrInfo.cpp b/lib/Target/Mips/Mips16InstrInfo.cpp
index 0612335..721af26 100644
--- a/lib/Target/Mips/Mips16InstrInfo.cpp
+++ b/lib/Target/Mips/Mips16InstrInfo.cpp
@@ -21,6 +21,7 @@
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/RegisterScavenging.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/TargetRegistry.h"
@@ -135,6 +136,9 @@ bool Mips16InstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const {
switch(MI->getDesc().getOpcode()) {
default:
return false;
+ case Mips::BtnezT8CmpX16:
+ ExpandFEXT_T8I816_ins(MBB, MI, Mips::BtnezX16, Mips::CmpRxRy16);
+ break;
case Mips::RetRA16:
ExpandRetRA16(MBB, MI, Mips::JrcRa16);
break;
@@ -399,6 +403,17 @@ void Mips16InstrInfo::ExpandRetRA16(MachineBasicBlock &MBB,
BuildMI(MBB, I, I->getDebugLoc(), get(Opc));
}
+
+void Mips16InstrInfo::ExpandFEXT_T8I816_ins(
+ MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+ unsigned BtOpc, unsigned CmpOpc) const {
+ unsigned regX = I->getOperand(0).getReg();
+ unsigned regY = I->getOperand(1).getReg();
+ MachineBasicBlock *target = I->getOperand(2).getMBB();
+ BuildMI(MBB, I, I->getDebugLoc(), get(CmpOpc)).addReg(regX).addReg(regY);
+ BuildMI(MBB, I, I->getDebugLoc(), get(BtOpc)).addMBB(target);
+
+}
const MCInstrDesc &Mips16InstrInfo::AddiuSpImm(int64_t Imm) const {
if (validSpImm8(Imm))
return get(Mips::AddiuSpImm16);
diff --git a/lib/Target/Mips/Mips16InstrInfo.h b/lib/Target/Mips/Mips16InstrInfo.h
index d197e7c..2e2ba9b 100644
--- a/lib/Target/Mips/Mips16InstrInfo.h
+++ b/lib/Target/Mips/Mips16InstrInfo.h
@@ -115,7 +115,9 @@ private:
MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const;
-
+ void ExpandFEXT_T8I816_ins(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator I,
+ unsigned BtOpc, unsigned CmpOpc) const;
};
}
diff --git a/lib/Target/Mips/Mips16InstrInfo.td b/lib/Target/Mips/Mips16InstrInfo.td
index ea4bbe8..2ab7b47 100644
--- a/lib/Target/Mips/Mips16InstrInfo.td
+++ b/lib/Target/Mips/Mips16InstrInfo.td
@@ -516,7 +516,9 @@ def BnezRxImmX16: FEXT_RI16_B_ins<0b00101, "bnez", IIAlu>, cbranch16;
// Purpose: Branch on T Equal to Zero (Extended)
// To test special register T then do a PC-relative conditional branch.
//
-def BteqzX16: FEXT_I816_ins<0b000, "bteqz", IIAlu>, cbranch16;
+def BteqzX16: FEXT_I816_ins<0b000, "bteqz", IIAlu>, cbranch16 {
+ let Uses = [T8];
+}
def BteqzT8CmpX16: FEXT_T8I816_ins<"bteqz", "cmp">, cbranch16;
@@ -537,7 +539,9 @@ def BteqzT8SltiuX16: FEXT_T8I8I16_ins<"bteqz", "sltiu">,
// Purpose: Branch on T Not Equal to Zero (Extended)
// To test special register T then do a PC-relative conditional branch.
//
-def BtnezX16: FEXT_I816_ins<0b001, "btnez", IIAlu> ,cbranch16;
+def BtnezX16: FEXT_I816_ins<0b001, "btnez", IIAlu> ,cbranch16 {
+ let Uses = [T8];
+}
def BtnezT8CmpX16: FEXT_T8I816_ins<"btnez", "cmp">, cbranch16;
@@ -553,6 +557,16 @@ def BtnezT8SltiuX16: FEXT_T8I8I16_ins<"btnez", "sltiu">,
cbranch16;
//
+// Format: CMP rx, ry MIPS16e
+// Purpose: Compare
+// To compare the contents of two GPRs.
+//
+def CmpRxRy16: FRR16_ins<0b01010, "cmp", IIAlu> {
+ let Defs = [T8];
+}
+
+
+//
// Format: DIV rx, ry MIPS16e
// Purpose: Divide Word
// To divide 32-bit signed integers.
diff --git a/test/CodeGen/Mips/seleq.ll b/test/CodeGen/Mips/seleq.ll
new file mode 100644
index 0000000..190baad
--- /dev/null
+++ b/test/CodeGen/Mips/seleq.ll
@@ -0,0 +1,95 @@
+; RUN: llc -march=mipsel -mcpu=mips16 -relocation-model=pic < %s | FileCheck %s -check-prefix=16
+
+@t = global i32 10, align 4
+@f = global i32 199, align 4
+@a = global i32 1, align 4
+@b = global i32 10, align 4
+@c = global i32 1, align 4
+@z1 = common global i32 0, align 4
+@z2 = common global i32 0, align 4
+@z3 = common global i32 0, align 4
+@z4 = common global i32 0, align 4
+
+define void @calc_seleq() nounwind "target-cpu"="mips32" "target-features"="+o32,+mips32" {
+entry:
+ %0 = load i32* @a, align 4
+ %1 = load i32* @b, align 4
+ %cmp = icmp eq i32 %0, %1
+ br i1 %cmp, label %cond.true, label %cond.false
+
+cond.true: ; preds = %entry
+ %2 = load i32* @f, align 4
+ br label %cond.end
+
+cond.false: ; preds = %entry
+ %3 = load i32* @t, align 4
+ br label %cond.end
+
+cond.end: ; preds = %cond.false, %cond.true
+ %cond = phi i32 [ %2, %cond.true ], [ %3, %cond.false ]
+ store i32 %cond, i32* @z1, align 4
+ %4 = load i32* @b, align 4
+ %5 = load i32* @a, align 4
+ %cmp1 = icmp eq i32 %4, %5
+ br i1 %cmp1, label %cond.true2, label %cond.false3
+
+cond.true2: ; preds = %cond.end
+ %6 = load i32* @f, align 4
+ br label %cond.end4
+
+cond.false3: ; preds = %cond.end
+ %7 = load i32* @t, align 4
+ br label %cond.end4
+
+cond.end4: ; preds = %cond.false3, %cond.true2
+ %cond5 = phi i32 [ %6, %cond.true2 ], [ %7, %cond.false3 ]
+ store i32 %cond5, i32* @z2, align 4
+ %8 = load i32* @c, align 4
+ %9 = load i32* @a, align 4
+ %cmp6 = icmp eq i32 %8, %9
+ br i1 %cmp6, label %cond.true7, label %cond.false8
+
+cond.true7: ; preds = %cond.end4
+ %10 = load i32* @t, align 4
+ br label %cond.end9
+
+cond.false8: ; preds = %cond.end4
+ %11 = load i32* @f, align 4
+ br label %cond.end9
+
+cond.end9: ; preds = %cond.false8, %cond.true7
+ %cond10 = phi i32 [ %10, %cond.true7 ], [ %11, %cond.false8 ]
+ store i32 %cond10, i32* @z3, align 4
+ %12 = load i32* @a, align 4
+ %13 = load i32* @c, align 4
+ %cmp11 = icmp eq i32 %12, %13
+ br i1 %cmp11, label %cond.true12, label %cond.false13
+
+cond.true12: ; preds = %cond.end9
+ %14 = load i32* @t, align 4
+ br label %cond.end14
+
+cond.false13: ; preds = %cond.end9
+ %15 = load i32* @f, align 4
+ br label %cond.end14
+
+cond.end14: ; preds = %cond.false13, %cond.true12
+ %cond15 = phi i32 [ %14, %cond.true12 ], [ %15, %cond.false13 ]
+ store i32 %cond15, i32* @z4, align 4
+ ret void
+}
+
+attributes #0 = { nounwind "target-cpu"="mips32" "target-features"="+o32,+mips32" }
+
+; 16: cmp ${{[0-9]+}}, ${{[0-9]+}}
+; 16: btnez $BB{{[0-9]+}}_{{[0-9]}}
+
+; 16: cmp ${{[0-9]+}}, ${{[0-9]+}}
+; 16: btnez $BB{{[0-9]+}}_{{[0-9]}}
+
+; 16: cmp ${{[0-9]+}}, ${{[0-9]+}}
+; 16: btnez $BB{{[0-9]+}}_{{[0-9]}}
+
+; 16: cmp ${{[0-9]+}}, ${{[0-9]+}}
+; 16: btnez $BB{{[0-9]+}}_{{[0-9]}}
+
generated by cgit v1.1 at 2024-12-25 14:19:29 +0000