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InferAddressSpaces: Don't replace volatile users 

llvm-svn: 293582
This commit is contained in:
Matt Arsenault 2017-01-31 01:30:16 +00:00
parent 8335dd314f
commit d89a6e11a7
2 changed files with 87 additions and 2 deletions
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7
llvm/lib/Transforms/Scalar/InferAddressSpaces.cpp
View File

@ -570,8 +570,11 @@ bool InferAddressSpaces::rewriteWithNewAddressSpaces(
<< "\n with\n " << *NewV << '\n');
for (Use *U : Uses) {
if (isa<LoadInst>(U->getUser()) ||
(isa<StoreInst>(U->getUser()) &&
LoadInst *LI = dyn_cast<LoadInst>(U->getUser());
StoreInst *SI = dyn_cast<StoreInst>(U->getUser());
if ((LI && !LI->isVolatile()) ||
(SI && !SI->isVolatile() &&
U->getOperandNo() == StoreInst::getPointerOperandIndex())) {
// If V is used as the pointer operand of a load/store, sets the pointer
// operand to NewV. This replacement does not change the element type,

82
llvm/test/Transforms/InferAddressSpaces/AMDGPU/volatile.ll Normal file
View File

@ -0,0 +1,82 @@
; RUN: opt -S -mtriple=amdgcn-amd-amdhsa -infer-address-spaces %s | FileCheck %s
; Check that volatile users of addrspacecast are not replaced.
; CHECK-LABEL: @volatile_load_flat_from_global(
; CHECK: load volatile i32, i32 addrspace(4)*
; CHECK: store i32 %val, i32 addrspace(1)*
define void @volatile_load_flat_from_global(i32 addrspace(1)* nocapture %input, i32 addrspace(1)* nocapture %output) #0 {
%tmp0 = addrspacecast i32 addrspace(1)* %input to i32 addrspace(4)*
%tmp1 = addrspacecast i32 addrspace(1)* %output to i32 addrspace(4)*
%val = load volatile i32, i32 addrspace(4)* %tmp0, align 4
store i32 %val, i32 addrspace(4)* %tmp1, align 4
ret void
}
; CHECK-LABEL: @volatile_load_flat_from_constant(
; CHECK: load volatile i32, i32 addrspace(4)*
; CHECK: store i32 %val, i32 addrspace(1)*
define void @volatile_load_flat_from_constant(i32 addrspace(2)* nocapture %input, i32 addrspace(1)* nocapture %output) #0 {
%tmp0 = addrspacecast i32 addrspace(2)* %input to i32 addrspace(4)*
%tmp1 = addrspacecast i32 addrspace(1)* %output to i32 addrspace(4)*
%val = load volatile i32, i32 addrspace(4)* %tmp0, align 4
store i32 %val, i32 addrspace(4)* %tmp1, align 4
ret void
}
; CHECK-LABEL: @volatile_load_flat_from_group(
; CHECK: load volatile i32, i32 addrspace(4)*
; CHECK: store i32 %val, i32 addrspace(3)*
define void @volatile_load_flat_from_group(i32 addrspace(3)* nocapture %input, i32 addrspace(3)* nocapture %output) #0 {
%tmp0 = addrspacecast i32 addrspace(3)* %input to i32 addrspace(4)*
%tmp1 = addrspacecast i32 addrspace(3)* %output to i32 addrspace(4)*
%val = load volatile i32, i32 addrspace(4)* %tmp0, align 4
store i32 %val, i32 addrspace(4)* %tmp1, align 4
ret void
}
; CHECK-LABEL: @volatile_load_flat_from_private(
; CHECK: load volatile i32, i32 addrspace(4)*
; CHECK: store i32 %val, i32*
define void @volatile_load_flat_from_private(i32* nocapture %input, i32* nocapture %output) #0 {
%tmp0 = addrspacecast i32* %input to i32 addrspace(4)*
%tmp1 = addrspacecast i32* %output to i32 addrspace(4)*
%val = load volatile i32, i32 addrspace(4)* %tmp0, align 4
store i32 %val, i32 addrspace(4)* %tmp1, align 4
ret void
}
; CHECK-LABEL: @volatile_store_flat_to_global(
; CHECK: load i32, i32 addrspace(1)*
; CHECK: store volatile i32 %val, i32 addrspace(4)*
define void @volatile_store_flat_to_global(i32 addrspace(1)* nocapture %input, i32 addrspace(1)* nocapture %output) #0 {
%tmp0 = addrspacecast i32 addrspace(1)* %input to i32 addrspace(4)*
%tmp1 = addrspacecast i32 addrspace(1)* %output to i32 addrspace(4)*
%val = load i32, i32 addrspace(4)* %tmp0, align 4
store volatile i32 %val, i32 addrspace(4)* %tmp1, align 4
ret void
}
; CHECK-LABEL: @volatile_store_flat_to_group(
; CHECK: load i32, i32 addrspace(3)*
; CHECK: store volatile i32 %val, i32 addrspace(4)*
define void @volatile_store_flat_to_group(i32 addrspace(3)* nocapture %input, i32 addrspace(3)* nocapture %output) #0 {
%tmp0 = addrspacecast i32 addrspace(3)* %input to i32 addrspace(4)*
%tmp1 = addrspacecast i32 addrspace(3)* %output to i32 addrspace(4)*
%val = load i32, i32 addrspace(4)* %tmp0, align 4
store volatile i32 %val, i32 addrspace(4)* %tmp1, align 4
ret void
}
; CHECK-LABEL: @volatile_store_flat_to_private(
; CHECK: load i32, i32*
; CHECK: store volatile i32 %val, i32 addrspace(4)*
define void @volatile_store_flat_to_private(i32* nocapture %input, i32* nocapture %output) #0 {
%tmp0 = addrspacecast i32* %input to i32 addrspace(4)*
%tmp1 = addrspacecast i32* %output to i32 addrspace(4)*
%val = load i32, i32 addrspace(4)* %tmp0, align 4
store volatile i32 %val, i32 addrspace(4)* %tmp1, align 4
ret void
}
attributes #0 = { nounwind }