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Make nocapture analysis work with addrspacecast

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llvm-svn: 199246
This commit is contained in:
Matt Arsenault 2014-01-14 19:11:52 +00:00
parent 16efb0d1a0
commit 50ba8b89a7
3 changed files with 18 additions and 0 deletions
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1
lib/Analysis/CaptureTracking.cpp
View File

@ -145,6 +145,7 @@ void llvm::PointerMayBeCaptured(const Value *V, CaptureTracker *Tracker) {
case Instruction::GetElementPtr:
case Instruction::PHI:
case Instruction::Select:
case Instruction::AddrSpaceCast:
// The original value is not captured via this if the new value isn't.
Count = 0;
for (Instruction::use_iterator UI = I->use_begin(), UE = I->use_end();

2
lib/Transforms/IPO/FunctionAttrs.cpp
View File

@ -437,6 +437,7 @@ determinePointerReadAttrs(Argument *A,
case Instruction::GetElementPtr:
case Instruction::PHI:
case Instruction::Select:
case Instruction::AddrSpaceCast:
// The original value is not read/written via this if the new value isn't.
for (Instruction::use_iterator UI = I->use_begin(), UE = I->use_end();
UI != UE; ++UI) {
@ -723,6 +724,7 @@ bool FunctionAttrs::IsFunctionMallocLike(Function *F,
// Extend the analysis by looking upwards.
case Instruction::BitCast:
case Instruction::GetElementPtr:
case Instruction::AddrSpaceCast:
FlowsToReturn.insert(RVI->getOperand(0));
continue;
case Instruction::Select: {

15
test/Transforms/FunctionAttrs/nocapture.ll
View File

@ -91,6 +91,21 @@ l:
ret i32 %val
}
; CHECK: define i32 @nc1_addrspace(i32* %q, i32 addrspace(1)* nocapture %p, i1 %b)
define i32 @nc1_addrspace(i32* %q, i32 addrspace(1)* %p, i1 %b) {
e:
br label %l
l:
%x = phi i32 addrspace(1)* [ %p, %e ]
%y = phi i32* [ %q, %e ]
%tmp = addrspacecast i32 addrspace(1)* %x to i32* ; <i32*> [#uses=2]
%tmp2 = select i1 %b, i32* %tmp, i32* %y
%val = load i32* %tmp2 ; <i32> [#uses=1]
store i32 0, i32* %tmp
store i32* %y, i32** @g
ret i32 %val
}
; CHECK: define void @nc2(i32* nocapture %p, i32* %q)
define void @nc2(i32* %p, i32* %q) {
%1 = call i32 @nc1(i32* %q, i32* %p, i1 0) ; <i32> [#uses=0]