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Use correct size for address space in BasicAA.

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The tests just hit this with a different sized
address space since I haven't figured out how
to use this to break it.

I thought I committed this a long time ago,
and I'm not sure why missing this hasn't caused
any problems.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194903 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2013-11-16 00:36:43 +00:00
parent 1dc2723996
commit 74c996cbd1
3 changed files with 44 additions and 4 deletions
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5
lib/Analysis/BasicAliasAnalysis.cpp
View File

@ -326,6 +326,7 @@ DecomposeGEPExpression(const Value *V, int64_t &BaseOffs,
continue;
}
unsigned AS = GEPOp->getPointerAddressSpace();
// Walk the indices of the GEP, accumulating them into BaseOff/VarIndices.
gep_type_iterator GTI = gep_type_begin(GEPOp);
for (User::const_op_iterator I = GEPOp->op_begin()+1,
@ -354,7 +355,7 @@ DecomposeGEPExpression(const Value *V, int64_t &BaseOffs,
// If the integer type is smaller than the pointer size, it is implicitly
// sign extended to pointer size.
unsigned Width = Index->getType()->getIntegerBitWidth();
if (TD->getPointerSizeInBits() > Width)
if (TD->getPointerSizeInBits(AS) > Width)
Extension = EK_SignExt;
// Use GetLinearExpression to decompose the index into a C1*V+C2 form.
@ -382,7 +383,7 @@ DecomposeGEPExpression(const Value *V, int64_t &BaseOffs,
// Make sure that we have a scale that makes sense for this target's
// pointer size.
if (unsigned ShiftBits = 64-TD->getPointerSizeInBits()) {
if (unsigned ShiftBits = 64 - TD->getPointerSizeInBits(AS)) {
Scale <<= ShiftBits;
Scale = (int64_t)Scale >> ShiftBits;
}

29
test/Analysis/BasicAA/gep-alias.ll
View File

@ -1,6 +1,6 @@
; RUN: opt < %s -basicaa -gvn -instcombine -S 2>&1 | FileCheck %s
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-f80:128:128"
target datalayout = "e-p:32:32:32-p1:16:16:16-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-f80:128:128"
; Make sure that basicaa thinks R and r are must aliases.
define i32 @test1(i8 * %P) {
@ -86,6 +86,33 @@ define i32 @test5(i32* %p, i64 %i) {
; CHECK: ret i32 0
}
define i32 @test5_as1_smaller_size(i32 addrspace(1)* %p, i8 %i) {
%pi = getelementptr i32 addrspace(1)* %p, i8 %i
%i.next = add i8 %i, 1
%pi.next = getelementptr i32 addrspace(1)* %p, i8 %i.next
%x = load i32 addrspace(1)* %pi
store i32 42, i32 addrspace(1)* %pi.next
%y = load i32 addrspace(1)* %pi
%z = sub i32 %x, %y
ret i32 %z
; CHECK-LABEL: @test5_as1_smaller_size(
; CHECK: sext
; CHECK: ret i32 0
}
define i32 @test5_as1_same_size(i32 addrspace(1)* %p, i16 %i) {
%pi = getelementptr i32 addrspace(1)* %p, i16 %i
%i.next = add i16 %i, 1
%pi.next = getelementptr i32 addrspace(1)* %p, i16 %i.next
%x = load i32 addrspace(1)* %pi
store i32 42, i32 addrspace(1)* %pi.next
%y = load i32 addrspace(1)* %pi
%z = sub i32 %x, %y
ret i32 %z
; CHECK-LABEL: @test5_as1_same_size(
; CHECK: ret i32 0
}
; P[i] != p[(i*4)|1]
define i32 @test6(i32* %p, i64 %i1) {
%i = shl i64 %i1, 2

14
test/Analysis/BasicAA/global-size.ll
View File

@ -2,7 +2,7 @@
; the global.
; RUN: opt < %s -basicaa -gvn -S | FileCheck %s
target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
target datalayout = "E-p:64:64:64-p1:16:16:16-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
@B = global i16 8
@ -16,6 +16,18 @@ define i16 @test1(i32* %P) {
; CHECK: ret i16 0
}
@B_as1 = addrspace(1) global i16 8
define i16 @test1_as1(i32 addrspace(1)* %P) {
; CHECK-LABEL: @test1_as1(
; CHECK: ret i16 0
%X = load i16 addrspace(1)* @B_as1
store i32 7, i32 addrspace(1)* %P
%Y = load i16 addrspace(1)* @B_as1
%Z = sub i16 %Y, %X
ret i16 %Z
}
; Cannot know anything about the size of this global.
; rdar://8813415
@window = external global [0 x i8]