[llvm-commits] [llvm] r80001 - in /llvm/trunk: lib/Target/MSP430/MSP430ISelLowering.cpp lib/Target/MSP430/MSP430RegisterInfo.cpp test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll
Anton Korobeynikov
asl at math.spbu.ru
Tue Aug 25 10:00:24 PDT 2009
Author: asl
Date: Tue Aug 25 12:00:23 2009
New Revision: 80001
URL: http://llvm.org/viewvc/llvm-project?rev=80001&view=rev
Log:
Provide dynamic_stackalloc lowering for MSP430.
This fixes PR4769
Added:
llvm/trunk/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll
Modified:
llvm/trunk/lib/Target/MSP430/MSP430ISelLowering.cpp
llvm/trunk/lib/Target/MSP430/MSP430RegisterInfo.cpp
Modified: llvm/trunk/lib/Target/MSP430/MSP430ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/MSP430/MSP430ISelLowering.cpp?rev=80001&r1=80000&r2=80001&view=diff
==============================================================================
--- llvm/trunk/lib/Target/MSP430/MSP430ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/MSP430/MSP430ISelLowering.cpp Tue Aug 25 12:00:23 2009
@@ -95,6 +95,8 @@
setOperationAction(ISD::SELECT_CC, MVT::i8, Custom);
setOperationAction(ISD::SELECT_CC, MVT::i16, Custom);
setOperationAction(ISD::SIGN_EXTEND, MVT::i16, Custom);
+ setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i8, Expand);
+ setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i16, Expand);
setOperationAction(ISD::CTTZ, MVT::i8, Expand);
setOperationAction(ISD::CTTZ, MVT::i16, Expand);
Modified: llvm/trunk/lib/Target/MSP430/MSP430RegisterInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/MSP430/MSP430RegisterInfo.cpp?rev=80001&r1=80000&r2=80001&view=diff
==============================================================================
--- llvm/trunk/lib/Target/MSP430/MSP430RegisterInfo.cpp (original)
+++ llvm/trunk/lib/Target/MSP430/MSP430RegisterInfo.cpp Tue Aug 25 12:00:23 2009
@@ -328,7 +328,16 @@
// mergeSPUpdatesUp(MBB, MBBI, StackPtr, &NumBytes);
if (MFI->hasVarSizedObjects()) {
- llvm_unreachable("Not implemented yet!");
+ BuildMI(MBB, MBBI, DL,
+ TII.get(MSP430::MOV16rr), MSP430::SPW).addReg(MSP430::FPW);
+ if (CSSize) {
+ MachineInstr *MI =
+ BuildMI(MBB, MBBI, DL,
+ TII.get(MSP430::SUB16ri), MSP430::SPW)
+ .addReg(MSP430::SPW).addImm(CSSize);
+ // The SRW implicit def is dead.
+ MI->getOperand(3).setIsDead();
+ }
} else {
// adjust stack pointer back: SPW += numbytes
if (NumBytes) {
Added: llvm/trunk/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll?rev=80001&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll (added)
+++ llvm/trunk/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll Tue Aug 25 12:00:23 2009
@@ -0,0 +1,30 @@
+; RUN: llvm-as < %s | llc
+; PR4769
+target datalayout = "e-p:16:8:8-i8:8:8-i16:8:8-i32:8:8"
+target triple = "msp430-generic-generic"
+
+define i16 @foo() nounwind readnone {
+entry:
+ %result = alloca i16, align 1 ; <i16*> [#uses=2]
+ volatile store i16 0, i16* %result
+ %tmp = volatile load i16* %result ; <i16> [#uses=1]
+ ret i16 %tmp
+}
+
+define i16 @main() nounwind {
+entry:
+ br label %while.cond
+
+while.cond: ; preds = %while.cond, %entry
+ %call = call i16 @bar() nounwind ; <i16> [#uses=1]
+ %tobool = icmp eq i16 %call, 0 ; <i1> [#uses=1]
+ br i1 %tobool, label %while.end, label %while.cond
+
+while.end: ; preds = %while.cond
+ %result.i = alloca i16, align 1 ; <i16*> [#uses=2]
+ volatile store i16 0, i16* %result.i
+ %tmp.i = volatile load i16* %result.i ; <i16> [#uses=0]
+ ret i16 0
+}
+
+declare i16 @bar()
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