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Fix assert with copy from global through addrspacecast

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196638 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2013-12-07 02:58:45 +00:00
parent 47172e86cc
commit eb2934e782
2 changed files with 41 additions and 3 deletions
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6
lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
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@ -263,9 +263,9 @@ Instruction *InstCombiner::visitAllocaInst(AllocaInst &AI) {
for (unsigned i = 0, e = ToDelete.size(); i != e; ++i)
EraseInstFromFunction(*ToDelete[i]);
Constant *TheSrc = cast<Constant>(Copy->getSource());
Instruction *NewI
= ReplaceInstUsesWith(AI, ConstantExpr::getBitCast(TheSrc,
AI.getType()));
Constant *Cast
= ConstantExpr::getPointerBitCastOrAddrSpaceCast(TheSrc, AI.getType());
Instruction *NewI = ReplaceInstUsesWith(AI, Cast);
EraseInstFromFunction(*Copy);
++NumGlobalCopies;
return NewI;

38
test/Transforms/InstCombine/addrspacecast.ll
View File

@ -2,6 +2,12 @@
target datalayout = "e-p:64:64:64-p1:32:32:32-p2:16:16:16-n8:16:32:64"
declare void @llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1) nounwind
declare void @llvm.memcpy.p0i8.p1i8.i32(i8*, i8 addrspace(1)*, i32, i32, i1) nounwind
declare void @llvm.memcpy.p0i8.p2i8.i32(i8*, i8 addrspace(2)*, i32, i32, i1) nounwind
define i32* @combine_redundant_addrspacecast(i32 addrspace(1)* %x) nounwind {
; CHECK-LABEL: @combine_redundant_addrspacecast(
; CHECK: addrspacecast i32 addrspace(1)* %x to i32*
@ -29,3 +35,35 @@ define float* @combine_redundant_addrspacecast_types(i32 addrspace(1)* %x) nounw
ret float* %z
}
@const_array = addrspace(2) constant [60 x i8] [i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22,
i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22,
i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22,
i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22,
i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22, i8 2, i8 9, i8 4, i8 22 ]
declare void @foo(i8*) nounwind
; A copy from a constant addrspacecast'ed global
; CHECK-LABEL: @memcpy_addrspacecast(
; CHECK-NOT: call void @llvm.memcpy
define i32 @memcpy_addrspacecast() nounwind {
entry:
%alloca = alloca i8, i32 48
call void @llvm.memcpy.p0i8.p1i8.i32(i8* %alloca, i8 addrspace(1)* addrspacecast (i8 addrspace(2)* getelementptr inbounds ([60 x i8] addrspace(2)* @const_array, i16 0, i16 4) to i8 addrspace(1)*), i32 48, i32 4, i1 false) nounwind
br label %loop.body
loop.body:
%i = phi i32 [ 0, %entry ], [ %i.inc, %loop.body ]
%sum = phi i32 [ 0, %entry ], [ %sum.inc, %loop.body]
%ptr = getelementptr i8* %alloca, i32 %i
%load = load i8* %ptr
%ext = zext i8 %load to i32
%sum.inc = add i32 %sum, %ext
%i.inc = add i32 %i, 1
%cmp = icmp ne i32 %i, 48
br i1 %cmp, label %loop.body, label %end
end:
ret i32 %sum.inc
}