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Fix a bug in ComputeLinearIndex computation handling multi-level

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aggregate types. Don't increment the current index after reaching
the end of a struct, as it will already be pointing at
one-past-the end. This fixes PR3288.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61828 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-01-06 22:53:52 +00:00
parent 5d31598954
commit 2c91d102ec
2 changed files with 70 additions and 1 deletions
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4
lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
View File

@ -63,7 +63,7 @@ LimitFPPrecision("limit-float-precision",
cl::init(0));
/// ComputeLinearIndex - Given an LLVM IR aggregate type and a sequence
/// insertvalue or extractvalue indices that identify a member, return
/// of insertvalue or extractvalue indices that identify a member, return
/// the linearized index of the start of the member.
///
static unsigned ComputeLinearIndex(const TargetLowering &TLI, const Type *Ty,
@ -84,6 +84,7 @@ static unsigned ComputeLinearIndex(const TargetLowering &TLI, const Type *Ty,
return ComputeLinearIndex(TLI, *EI, Indices+1, IndicesEnd, CurIndex);
CurIndex = ComputeLinearIndex(TLI, *EI, 0, 0, CurIndex);
}
return CurIndex;
}
// Given an array type, recursively traverse the elements.
else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
@ -93,6 +94,7 @@ static unsigned ComputeLinearIndex(const TargetLowering &TLI, const Type *Ty,
return ComputeLinearIndex(TLI, EltTy, Indices+1, IndicesEnd, CurIndex);
CurIndex = ComputeLinearIndex(TLI, EltTy, 0, 0, CurIndex);
}
return CurIndex;
}
// We haven't found the type we're looking for, so keep searching.
return CurIndex + 1;

67
test/CodeGen/Generic/pr3288.ll Normal file
View File

@ -0,0 +1,67 @@
; RUN: llvm-as < %s | llc
; PR3288
define void @a() {
%i = insertvalue [2 x [2 x i32]] undef, [2 x i32] undef, 1
ret void
}
define void @b() {
%i = insertvalue {{i32,float},{i16,double}} undef, {i16,double} undef, 1
ret void
}
define void @c() {
%i = insertvalue [2 x [2 x i32]] zeroinitializer, [2 x i32] zeroinitializer, 1
ret void
}
define void @d() {
%i = insertvalue {{i32,float},{i16,double}} zeroinitializer, {i16,double} zeroinitializer, 1
ret void
}
define void @e() {
%i = insertvalue [2 x [2 x i32]] undef, [2 x i32] undef, 0
ret void
}
define void @f() {
%i = insertvalue {{i32,float},{i16,double}} undef, {i32,float} undef, 0
ret void
}
define void @g() {
%i = insertvalue [2 x [2 x i32]] zeroinitializer, [2 x i32] zeroinitializer, 0
ret void
}
define void @h() {
%i = insertvalue {{i32,float},{i16,double}} zeroinitializer, {i32,float} zeroinitializer, 0
ret void
}
define void @ax() {
%i = insertvalue [2 x [2 x i32]] undef, i32 undef, 1, 1
ret void
}
define void @bx() {
%i = insertvalue {{i32,float},{i16,double}} undef, double undef, 1, 1
ret void
}
define void @cx() {
%i = insertvalue [2 x [2 x i32]] zeroinitializer, i32 zeroinitializer, 1, 1
ret void
}
define void @dx() {
%i = insertvalue {{i32,float},{i16,double}} zeroinitializer, double zeroinitializer, 1, 1
ret void
}
define void @ex() {
%i = insertvalue [2 x [2 x i32]] undef, i32 undef, 0, 1
ret void
}
define void @fx() {
%i = insertvalue {{i32,float},{i16,double}} undef, float undef, 0, 1
ret void
}
define void @gx() {
%i = insertvalue [2 x [2 x i32]] zeroinitializer, i32 zeroinitializer, 0, 1
ret void
}
define void @hx() {
%i = insertvalue {{i32,float},{i16,double}} zeroinitializer, float zeroinitializer, 0, 1
ret void
}