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Make sure sin, cos, sqrt calls are marked readonly 

before producing FSIN, FCOS, FSQRT.  If they aren't
so marked we have to assume they might set errno.

llvm-svn: 82781
This commit is contained in:
Dale Johannesen 2009-09-25 18:00:35 +00:00
parent 0a4c44bdf4
commit a318d91a1e
1 changed files with 6 additions and 3 deletions
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9
llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
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@ -4561,7 +4561,8 @@ void SelectionDAGLowering::visitCall(CallInst &I) {
} else if (Name == "sin" || Name == "sinf" || Name == "sinl") {
if (I.getNumOperands() == 2 && // Basic sanity checks.
I.getOperand(1)->getType()->isFloatingPoint() &&
I.getType() == I.getOperand(1)->getType()) {
I.getType() == I.getOperand(1)->getType() &&
I.onlyReadsMemory()) {
SDValue Tmp = getValue(I.getOperand(1));
setValue(&I, DAG.getNode(ISD::FSIN, getCurDebugLoc(),
Tmp.getValueType(), Tmp));
@ -4570,7 +4571,8 @@ void SelectionDAGLowering::visitCall(CallInst &I) {
} else if (Name == "cos" || Name == "cosf" || Name == "cosl") {
if (I.getNumOperands() == 2 && // Basic sanity checks.
I.getOperand(1)->getType()->isFloatingPoint() &&
I.getType() == I.getOperand(1)->getType()) {
I.getType() == I.getOperand(1)->getType() &&
I.onlyReadsMemory()) {
SDValue Tmp = getValue(I.getOperand(1));
setValue(&I, DAG.getNode(ISD::FCOS, getCurDebugLoc(),
Tmp.getValueType(), Tmp));
@ -4579,7 +4581,8 @@ void SelectionDAGLowering::visitCall(CallInst &I) {
} else if (Name == "sqrt" || Name == "sqrtf" || Name == "sqrtl") {
if (I.getNumOperands() == 2 && // Basic sanity checks.
I.getOperand(1)->getType()->isFloatingPoint() &&
I.getType() == I.getOperand(1)->getType()) {
I.getType() == I.getOperand(1)->getType() &&
I.onlyReadsMemory()) {
SDValue Tmp = getValue(I.getOperand(1));
setValue(&I, DAG.getNode(ISD::FSQRT, getCurDebugLoc(),
Tmp.getValueType(), Tmp));