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https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-22 10:29:35 +00:00
Teach the constant folder about union types.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97142 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -357,6 +357,22 @@ static Constant *getFoldedSizeOf(const Type *Ty, const Type *DestTy,
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}
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}
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if (const UnionType *UTy = dyn_cast<UnionType>(Ty)) {
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unsigned NumElems = UTy->getNumElements();
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// Check for a union with all members having the same size.
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Constant *MemberSize =
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getFoldedSizeOf(UTy->getElementType(0), DestTy, true);
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bool AllSame = true;
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for (unsigned i = 1; i != NumElems; ++i)
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if (MemberSize !=
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getFoldedSizeOf(UTy->getElementType(i), DestTy, true)) {
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AllSame = false;
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break;
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}
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if (AllSame)
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return MemberSize;
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}
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// Pointer size doesn't depend on the pointee type, so canonicalize them
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// to an arbitrary pointee.
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if (const PointerType *PTy = dyn_cast<PointerType>(Ty))
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@ -422,6 +438,24 @@ static Constant *getFoldedAlignOf(const Type *Ty, const Type *DestTy,
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return MemberAlign;
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}
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if (const UnionType *UTy = dyn_cast<UnionType>(Ty)) {
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// Union alignment is the maximum alignment of any member.
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// Without target data, we can't compare much, but we can check to see
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// if all the members have the same alignment.
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unsigned NumElems = UTy->getNumElements();
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// Check for a union with all members having the same alignment.
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Constant *MemberAlign =
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getFoldedAlignOf(UTy->getElementType(0), DestTy, true);
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bool AllSame = true;
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for (unsigned i = 1; i != NumElems; ++i)
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if (MemberAlign != getFoldedAlignOf(UTy->getElementType(i), DestTy, true)) {
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AllSame = false;
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break;
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}
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if (AllSame)
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return MemberAlign;
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}
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// Pointer alignment doesn't depend on the pointee type, so canonicalize them
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// to an arbitrary pointee.
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if (const PointerType *PTy = dyn_cast<PointerType>(Ty))
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@ -69,6 +69,8 @@
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; PLAIN: @g = constant i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
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; PLAIN: @h = constant i64 ptrtoint (i1** getelementptr (i1** null, i32 1) to i64)
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; PLAIN: @i = constant i64 ptrtoint (i1** getelementptr (%2* null, i64 0, i32 1) to i64)
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; PLAIN: @j = constant i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
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; PLAIN: @k = constant i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64)
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; OPT: @a = constant i64 mul (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2310)
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; OPT: @b = constant i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
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; OPT: @c = constant i64 mul (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2)
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@ -78,6 +80,8 @@
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; OPT: @g = constant i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
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; OPT: @h = constant i64 ptrtoint (i1** getelementptr (i1** null, i32 1) to i64)
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; OPT: @i = constant i64 ptrtoint (i1** getelementptr (%2* null, i64 0, i32 1) to i64)
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; OPT: @j = constant i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
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; OPT: @k = constant i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64)
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; TO: @a = constant i64 18480
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; TO: @b = constant i64 8
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; TO: @c = constant i64 16
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@ -87,6 +91,8 @@
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; TO: @g = constant i64 8
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; TO: @h = constant i64 8
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; TO: @i = constant i64 8
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; TO: @j = constant i64 8
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; TO: @k = constant i64 8
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@a = constant i64 mul (i64 3, i64 mul (i64 ptrtoint ({[7 x double], [7 x double]}* getelementptr ({[7 x double], [7 x double]}* null, i64 11) to i64), i64 5))
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@b = constant i64 ptrtoint ([13 x double]* getelementptr ({i1, [13 x double]}* null, i64 0, i32 1) to i64)
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@ -97,6 +103,8 @@
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@g = constant i64 ptrtoint ({double, double}* getelementptr ({i1, {double, double}}* null, i64 0, i32 1) to i64)
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@h = constant i64 ptrtoint (double** getelementptr (double** null, i64 1) to i64)
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@i = constant i64 ptrtoint (double** getelementptr ({i1, double*}* null, i64 0, i32 1) to i64)
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@j = constant i64 ptrtoint (union {double, double}* getelementptr ({i1, union {double, double}}* null, i64 0, i32 1) to i64)
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@k = constant i64 ptrtoint (union {double, double}* getelementptr (union {double, double}* null, i64 1) to i64)
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; The target-dependent folder should cast GEP indices to integer-sized pointers.
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@ -244,15 +252,23 @@ define i1* @hoo1() nounwind {
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; PLAIN: ret i64 %t
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; PLAIN: }
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; PLAIN: define i64 @fg() nounwind {
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; PLAIN: %t = bitcast i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
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; PLAIN: %t = bitcast i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64) to i64
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; PLAIN: ret i64 %t
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; PLAIN: }
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; PLAIN: define i64 @fh() nounwind {
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; PLAIN: %t = bitcast i64 ptrtoint (i1** getelementptr (i1** null, i32 1) to i64)
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; PLAIN: %t = bitcast i64 ptrtoint (i1** getelementptr (i1** null, i32 1) to i64) to i64
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; PLAIN: ret i64 %t
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; PLAIN: }
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; PLAIN: define i64 @fi() nounwind {
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; PLAIN: %t = bitcast i64 ptrtoint (i1** getelementptr (%2* null, i64 0, i32 1) to i64)
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; PLAIN: %t = bitcast i64 ptrtoint (i1** getelementptr (%2* null, i64 0, i32 1) to i64) to i64
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; PLAIN: ret i64 %t
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; PLAIN: }
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; PLAIN: define i64 @fj() nounwind {
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; PLAIN: %t = bitcast i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64) to i64
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; PLAIN: ret i64 %t
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; PLAIN: }
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; PLAIN: define i64 @fk() nounwind {
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; PLAIN: %t = bitcast i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64) to i64
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; PLAIN: ret i64 %t
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; PLAIN: }
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; OPT: define i64 @fa() nounwind {
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@ -282,6 +298,12 @@ define i1* @hoo1() nounwind {
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; OPT: define i64 @fi() nounwind {
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; OPT: ret i64 ptrtoint (i1** getelementptr (%2* null, i64 0, i32 1) to i64)
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; OPT: }
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; OPT: define i64 @fj() nounwind {
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; OPT: ret i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
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; OPT: }
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; OPT: define i64 @fk() nounwind {
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; OPT: ret i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64)
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; OPT: }
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; TO: define i64 @fa() nounwind {
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; TO: ret i64 18480
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; TO: }
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@ -309,6 +331,12 @@ define i1* @hoo1() nounwind {
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; TO: define i64 @fi() nounwind {
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; TO: ret i64 8
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; TO: }
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; TO: define i64 @fj() nounwind {
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; TO: ret i64 8
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; TO: }
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; TO: define i64 @fk() nounwind {
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; TO: ret i64 8
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; TO: }
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; SCEV: Classifying expressions for: @fa
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; SCEV: %t = bitcast i64 mul (i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64), i64 2310) to i64
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; SCEV: --> (2310 * sizeof(double))
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@ -328,14 +356,20 @@ define i1* @hoo1() nounwind {
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; SCEV: %t = bitcast i64 1 to i64
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; SCEV: --> 1
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; SCEV: Classifying expressions for: @fg
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; SCEV: %t = bitcast i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64)
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; SCEV: %t = bitcast i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64) to i64
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; SCEV: --> alignof(double)
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; SCEV: Classifying expressions for: @fh
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; SCEV: %t = bitcast i64 ptrtoint (i1** getelementptr (i1** null, i32 1) to i64)
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; SCEV: %t = bitcast i64 ptrtoint (i1** getelementptr (i1** null, i32 1) to i64) to i64
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; SCEV: --> sizeof(i1*)
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; SCEV: Classifying expressions for: @fi
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; SCEV: %t = bitcast i64 ptrtoint (i1** getelementptr (%2* null, i64 0, i32 1) to i64)
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; SCEV: %t = bitcast i64 ptrtoint (i1** getelementptr (%2* null, i64 0, i32 1) to i64) to i64
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; SCEV: --> alignof(i1*)
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; SCEV: Classifying expressions for: @fj
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; SCEV: %t = bitcast i64 ptrtoint (double* getelementptr (%0* null, i64 0, i32 1) to i64) to i64
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; SCEV: --> alignof(double)
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; SCEV: Classifying expressions for: @fk
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; SCEV: %t = bitcast i64 ptrtoint (double* getelementptr (double* null, i32 1) to i64) to i64
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; SCEV: --> sizeof(double)
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define i64 @fa() nounwind {
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%t = bitcast i64 mul (i64 3, i64 mul (i64 ptrtoint ({[7 x double], [7 x double]}* getelementptr ({[7 x double], [7 x double]}* null, i64 11) to i64), i64 5)) to i64
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@ -373,6 +407,14 @@ define i64 @fi() nounwind {
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%t = bitcast i64 ptrtoint (double** getelementptr ({i1, double*}* null, i64 0, i32 1) to i64) to i64
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ret i64 %t
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}
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define i64 @fj() nounwind {
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%t = bitcast i64 ptrtoint (union {double, double}* getelementptr ({i1, union {double, double}}* null, i64 0, i32 1) to i64) to i64
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ret i64 %t
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}
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define i64 @fk() nounwind {
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%t = bitcast i64 ptrtoint (union {double, double}* getelementptr (union {double, double}* null, i64 1) to i64) to i64
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ret i64 %t
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}
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; PLAIN: define i64* @fM() nounwind {
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; PLAIN: %t = bitcast i64* getelementptr (i64* null, i32 1) to i64*
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