[llvm-commits] [llvm] r41786 - in /llvm/trunk: lib/CodeGen/SelectionDAG/LegalizeDAG.cpp test/CodeGen/PowerPC/2007-09-08-unaligned.ll
Dale Johannesen
dalej at apple.com
Sat Sep 8 12:29:24 PDT 2007
Author: johannes
Date: Sat Sep 8 14:29:23 2007
New Revision: 41786
URL: http://llvm.org/viewvc/llvm-project?rev=41786&view=rev
Log:
Implement misaligned FP loads and stores.
Added:
llvm/trunk/test/CodeGen/PowerPC/2007-09-08-unaligned.ll
Modified:
llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
Modified: llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp?rev=41786&r1=41785&r2=41786&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp Sat Sep 8 14:29:23 2007
@@ -557,17 +557,32 @@
static
SDOperand ExpandUnalignedStore(StoreSDNode *ST, SelectionDAG &DAG,
TargetLowering &TLI) {
- assert(MVT::isInteger(ST->getStoredVT()) &&
- "Non integer unaligned stores not implemented.");
- int SVOffset = ST->getSrcValueOffset();
SDOperand Chain = ST->getChain();
SDOperand Ptr = ST->getBasePtr();
SDOperand Val = ST->getValue();
MVT::ValueType VT = Val.getValueType();
+ int Alignment = ST->getAlignment();
+ int SVOffset = ST->getSrcValueOffset();
+ if (MVT::isFloatingPoint(ST->getStoredVT())) {
+ // Expand to a bitconvert of the value to the integer type of the
+ // same size, then a (misaligned) int store.
+ MVT::ValueType intVT;
+ if (VT==MVT::f64)
+ intVT = MVT::i64;
+ else if (VT==MVT::f32)
+ intVT = MVT::i32;
+ else
+ assert(0 && "Unaligned load of unsupported floating point type");
+
+ SDOperand Result = DAG.getNode(ISD::BIT_CONVERT, intVT, Val);
+ return DAG.getStore(Chain, Result, Ptr, ST->getSrcValue(),
+ SVOffset, ST->isVolatile(), Alignment);
+ }
+ assert(MVT::isInteger(ST->getStoredVT()) &&
+ "Unaligned store of unknown type.");
// Get the half-size VT
MVT::ValueType NewStoredVT = ST->getStoredVT() - 1;
int NumBits = MVT::getSizeInBits(NewStoredVT);
- int Alignment = ST->getAlignment();
int IncrementSize = NumBits / 8;
// Divide the stored value in two parts.
@@ -593,13 +608,35 @@
static
SDOperand ExpandUnalignedLoad(LoadSDNode *LD, SelectionDAG &DAG,
TargetLowering &TLI) {
- assert(MVT::isInteger(LD->getLoadedVT()) &&
- "Non integer unaligned loads not implemented.");
int SVOffset = LD->getSrcValueOffset();
SDOperand Chain = LD->getChain();
SDOperand Ptr = LD->getBasePtr();
MVT::ValueType VT = LD->getValueType(0);
- MVT::ValueType NewLoadedVT = LD->getLoadedVT() - 1;
+ MVT::ValueType LoadedVT = LD->getLoadedVT();
+ if (MVT::isFloatingPoint(VT)) {
+ // Expand to a (misaligned) integer load of the same size,
+ // then bitconvert to floating point.
+ MVT::ValueType intVT;
+ if (LoadedVT==MVT::f64)
+ intVT = MVT::i64;
+ else if (LoadedVT==MVT::f32)
+ intVT = MVT::i32;
+ else
+ assert(0 && "Unaligned load of unsupported floating point type");
+
+ SDOperand newLoad = DAG.getLoad(intVT, Chain, Ptr, LD->getSrcValue(),
+ SVOffset, LD->isVolatile(),
+ LD->getAlignment());
+ SDOperand Result = DAG.getNode(ISD::BIT_CONVERT, LoadedVT, newLoad);
+ if (LoadedVT != VT)
+ Result = DAG.getNode(ISD::FP_EXTEND, VT, Result);
+
+ SDOperand Ops[] = { Result, Chain };
+ return DAG.getNode(ISD::MERGE_VALUES, DAG.getVTList(VT, MVT::Other),
+ Ops, 2);
+ }
+ assert(MVT::isInteger(LoadedVT) && "Unaligned load of unsupported type.");
+ MVT::ValueType NewLoadedVT = LoadedVT - 1;
int NumBits = MVT::getSizeInBits(NewLoadedVT);
int Alignment = LD->getAlignment();
int IncrementSize = NumBits / 8;
@@ -1640,8 +1677,8 @@
TLI);
Tmp3 = Result.getOperand(0);
Tmp4 = Result.getOperand(1);
- LegalizeOp(Tmp3);
- LegalizeOp(Tmp4);
+ Tmp3 = LegalizeOp(Tmp3);
+ Tmp4 = LegalizeOp(Tmp4);
}
}
break;
@@ -1709,8 +1746,8 @@
TLI);
Tmp1 = Result.getOperand(0);
Tmp2 = Result.getOperand(1);
- LegalizeOp(Tmp1);
- LegalizeOp(Tmp2);
+ Tmp1 = LegalizeOp(Tmp1);
+ Tmp2 = LegalizeOp(Tmp2);
}
}
}
Added: llvm/trunk/test/CodeGen/PowerPC/2007-09-08-unaligned.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/2007-09-08-unaligned.ll?rev=41786&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/PowerPC/2007-09-08-unaligned.ll (added)
+++ llvm/trunk/test/CodeGen/PowerPC/2007-09-08-unaligned.ll Sat Sep 8 14:29:23 2007
@@ -0,0 +1,53 @@
+; RUN: llvm-as < %s | llc | grep stfd | count 3
+; RUN: llvm-as < %s | llc | grep stfs | count 1
+; RUN: llvm-as < %s | llc | grep lfd | count 2
+; RUN: llvm-as < %s | llc | grep lfs | count 2
+; ModuleID = 'foo.c'
+target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f128:64:128"
+target triple = "powerpc-apple-darwin8"
+ %struct.anon = type <{ i8, float }>
+ at s = global %struct.anon <{ i8 3, float 0x4014666660000000 }> ; <%struct.anon*> [#uses=1]
+ at u = global <{ i8, double }> <{ i8 3, double 5.100000e+00 }> ; <<{ i8, double }>*> [#uses=1]
+ at t = weak global %struct.anon zeroinitializer ; <%struct.anon*> [#uses=2]
+ at v = weak global <{ i8, double }> zeroinitializer ; <<{ i8, double }>*> [#uses=2]
+ at .str = internal constant [8 x i8] c"%f %lf\0A\00" ; <[8 x i8]*> [#uses=1]
+
+define i32 @foo() {
+entry:
+ %retval = alloca i32, align 4 ; <i32*> [#uses=1]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ %tmp = getelementptr %struct.anon* @s, i32 0, i32 1 ; <float*> [#uses=1]
+ %tmp1 = load float* %tmp, align 1 ; <float> [#uses=1]
+ %tmp2 = getelementptr %struct.anon* @t, i32 0, i32 1 ; <float*> [#uses=1]
+ store float %tmp1, float* %tmp2, align 1
+ %tmp3 = getelementptr <{ i8, double }>* @u, i32 0, i32 1 ; <double*> [#uses=1]
+ %tmp4 = load double* %tmp3, align 1 ; <double> [#uses=1]
+ %tmp5 = getelementptr <{ i8, double }>* @v, i32 0, i32 1 ; <double*> [#uses=1]
+ store double %tmp4, double* %tmp5, align 1
+ br label %return
+
+return: ; preds = %entry
+ %retval6 = load i32* %retval ; <i32> [#uses=1]
+ ret i32 %retval6
+}
+
+define i32 @main() {
+entry:
+ %retval = alloca i32, align 4 ; <i32*> [#uses=1]
+ %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
+ %tmp = call i32 @foo( ) ; <i32> [#uses=0]
+ %tmp1 = getelementptr %struct.anon* @t, i32 0, i32 1 ; <float*> [#uses=1]
+ %tmp2 = load float* %tmp1, align 1 ; <float> [#uses=1]
+ %tmp23 = fpext float %tmp2 to double ; <double> [#uses=1]
+ %tmp4 = getelementptr <{ i8, double }>* @v, i32 0, i32 1 ; <double*> [#uses=1]
+ %tmp5 = load double* %tmp4, align 1 ; <double> [#uses=1]
+ %tmp6 = getelementptr [8 x i8]* @.str, i32 0, i32 0 ; <i8*> [#uses=1]
+ %tmp7 = call i32 (i8*, ...)* @printf( i8* %tmp6, double %tmp23, double %tmp5 ) ; <i32> [#uses=0]
+ br label %return
+
+return: ; preds = %entry
+ %retval8 = load i32* %retval ; <i32> [#uses=1]
+ ret i32 %retval8
+}
+
+declare i32 @printf(i8*, ...)
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