mirror of
https://github.com/c64scene-ar/llvm-6502.git
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2d21b25393
This patch changes GlobalAlias to point to an arbitrary ConstantExpr and it is
up to MC (or the system assembler) to decide if that expression is valid or not.
This reduces our ability to diagnose invalid uses and how early we can spot
them, but it also lets us do things like
@test5 = alias inttoptr(i32 sub (i32 ptrtoint (i32* @test2 to i32),
i32 ptrtoint (i32* @bar to i32)) to i32*)
An important implication of this patch is that the notion of aliased global
doesn't exist any more. The alias has to encode the information needed to
access it in its metadata (linkage, visibility, type, etc).
Another consequence to notice is that getSection has to return a "const char *".
It could return a NullTerminatedStringRef if there was such a thing, but when
that was proposed the decision was to just uses "const char*" for that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210062 91177308-0d34-0410-b5e6-96231b3b80d8
230 lines
8.2 KiB
LLVM
230 lines
8.2 KiB
LLVM
; RUN: opt -S -instcombine -o - %s | FileCheck %s
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target datalayout = "e-p:32:32:32-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v16:16:16-v24:32:32-v32:32:32-v64:64:64-v128:128:128-a0:0:64"
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; Cases that should be bitcast
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; Test cast between scalars with same bit sizes
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@alias_i32_to_f32 = alias bitcast (i32 (i32)* @func_i32 to float (float)*)
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; Test cast between vectors with same number of elements and bit sizes
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@alias_v2i32_to_v2f32 = alias bitcast (<2 x i32> (<2 x i32>)* @func_v2i32 to <2 x float> (<2 x float>)*)
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; Test cast from vector to scalar with same number of bits
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@alias_v2f32_to_i64 = alias bitcast (i64 (i64)* @func_i64 to <2 x float> (<2 x float>)*)
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; Test cast from scalar to vector with same number of bits
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@alias_i64_to_v2f32 = alias bitcast (<2 x float> (<2 x float>)* @func_v2f32 to i64 (i64)*)
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; Test cast between vectors of pointers
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@alias_v2i32p_to_v2i64p = alias bitcast (<2 x i32*> (<2 x i32*>)* @func_v2i32p to <2 x i64*> (<2 x i64*>)*)
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; Cases that should be invalid and unchanged
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; Test cast between scalars with different bit sizes
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@alias_i64_to_f32 = alias bitcast (i64 (i64)* @func_i64 to float (float)*)
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; Test cast between vectors with different bit sizes but the
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; same number of elements
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@alias_v2i64_to_v2f32 = alias bitcast (<2 x i64> (<2 x i64>)* @func_v2i64 to <2 x float> (<2 x float>)*)
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; Test cast between vectors with same number of bits and different
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; numbers of elements
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@alias_v2i32_to_v4f32 = alias bitcast (<2 x i32> (<2 x i32>)* @func_v2i32 to <4 x float> (<4 x float>)*)
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; Test cast between scalar and vector with different number of bits
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@alias_i64_to_v4f32 = alias bitcast (<4 x float> (<4 x float>)* @func_v4f32 to i64 (i64)*)
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; Test cast between vector and scalar with different number of bits
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@alias_v4f32_to_i64 = alias bitcast (i64 (i64)* @func_i64 to <4 x float> (<4 x float>)*)
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; Test cast from scalar to vector of pointers with same number of bits
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; We don't know the pointer size at this point, so this can't be done
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@alias_i64_to_v2i32p = alias bitcast (<2 x i32*> (<2 x i32*>)* @func_v2i32p to i64 (i64)*)
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; Test cast between vector of pointers and scalar with different number of bits
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@alias_v4i32p_to_i64 = alias bitcast (i64 (i64)* @func_i64 to <4 x i32*> (<4 x i32*>)*)
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define internal <2 x i32> @func_v2i32(<2 x i32> %v) noinline nounwind {
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entry:
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ret <2 x i32> %v
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}
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define internal <2 x float> @func_v2f32(<2 x float> %v) noinline nounwind {
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entry:
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ret <2 x float> %v
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}
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define internal <4 x float> @func_v4f32(<4 x float> %v) noinline nounwind {
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entry:
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ret <4 x float> %v
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}
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define internal i32 @func_i32(i32 %v) noinline nounwind {
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entry:
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ret i32 %v
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}
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define internal i64 @func_i64(i64 %v) noinline nounwind {
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entry:
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ret i64 %v
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}
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define internal <2 x i64> @func_v2i64(<2 x i64> %v) noinline nounwind {
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entry:
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ret <2 x i64> %v
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}
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define internal <2 x i32*> @func_v2i32p(<2 x i32*> %v) noinline nounwind {
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entry:
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ret <2 x i32*> %v
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}
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; Valid cases, only bitcast for argument / return type and call underlying function
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; Sizes match, should only bitcast
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define void @bitcast_alias_scalar(float* noalias %source, float* noalias %dest) nounwind {
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entry:
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; CHECK-LABEL: @bitcast_alias_scalar
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; CHECK: bitcast float %tmp to i32
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; CHECK-NOT: fptoui
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; CHECK-NOT: uitofp
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; CHECK: bitcast i32 %call to float
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%tmp = load float* %source, align 8
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%call = call float @alias_i32_to_f32(float %tmp) nounwind
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store float %call, float* %dest, align 8
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ret void
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}
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; Sizes match, should only bitcast
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define void @bitcast_alias_vector(<2 x float>* noalias %source, <2 x float>* noalias %dest) nounwind {
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entry:
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; CHECK-LABEL: @bitcast_alias_vector
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; CHECK: bitcast <2 x float> %tmp to <2 x i32>
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; CHECK-NOT: fptoui
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; CHECK-NOT: uitofp
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; CHECK: bitcast <2 x i32> %call to <2 x float>
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%tmp = load <2 x float>* %source, align 8
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%call = call <2 x float> @alias_v2i32_to_v2f32(<2 x float> %tmp) nounwind
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store <2 x float> %call, <2 x float>* %dest, align 8
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ret void
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}
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; Sizes match, should only bitcast
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define void @bitcast_alias_vector_scalar_same_size(<2 x float>* noalias %source, <2 x float>* noalias %dest) nounwind {
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entry:
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; CHECK-LABEL: @bitcast_alias_vector_scalar_same_size
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; CHECK: bitcast <2 x float> %tmp to i64
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; CHECK: %call = call i64 @func_i64
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; CHECK: bitcast i64 %call to <2 x float>
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%tmp = load <2 x float>* %source, align 8
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%call = call <2 x float> @alias_v2f32_to_i64(<2 x float> %tmp) nounwind
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store <2 x float> %call, <2 x float>* %dest, align 8
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ret void
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}
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define void @bitcast_alias_scalar_vector_same_size(i64* noalias %source, i64* noalias %dest) nounwind {
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entry:
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; CHECK-LABEL: @bitcast_alias_scalar_vector_same_size
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; CHECK: bitcast i64 %tmp to <2 x float>
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; CHECK: call <2 x float> @func_v2f32
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; CHECK: bitcast <2 x float> %call to i64
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%tmp = load i64* %source, align 8
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%call = call i64 @alias_i64_to_v2f32(i64 %tmp) nounwind
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store i64 %call, i64* %dest, align 8
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ret void
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}
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define void @bitcast_alias_vector_ptrs_same_size(<2 x i64*>* noalias %source, <2 x i64*>* noalias %dest) nounwind {
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entry:
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; CHECK-LABEL: @bitcast_alias_vector_ptrs_same_size
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; CHECK: bitcast <2 x i64*> %tmp to <2 x i32*>
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; CHECK: call <2 x i32*> @func_v2i32p
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; CHECK: bitcast <2 x i32*> %call to <2 x i64*>
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%tmp = load <2 x i64*>* %source, align 8
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%call = call <2 x i64*> @alias_v2i32p_to_v2i64p(<2 x i64*> %tmp) nounwind
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store <2 x i64*> %call, <2 x i64*>* %dest, align 8
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ret void
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}
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; Invalid cases:
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define void @bitcast_alias_mismatch_scalar_size(float* noalias %source, float* noalias %dest) nounwind {
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entry:
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; CHECK-LABEL: @bitcast_alias_mismatch_scalar_size
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; CHECK-NOT: fptoui
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; CHECK: @alias_i64_to_f32
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; CHECK-NOT: uitofp
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%tmp = load float* %source, align 8
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%call = call float @alias_i64_to_f32(float %tmp) nounwind
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store float %call, float* %dest, align 8
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ret void
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}
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define void @bitcast_alias_mismatch_vector_element_and_bit_size(<2 x float>* noalias %source, <2 x float>* noalias %dest) nounwind {
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entry:
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; CHECK-LABEL: @bitcast_alias_mismatch_vector_element_and_bit_size
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; CHECK-NOT: fptoui <2 x float> %tmp to <2 x i64>
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; CHECK: @alias_v2i64_to_v2f32
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; CHECK-NOT: uitofp <2 x i64> %call to <2 x float>
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%tmp = load <2 x float>* %source, align 8
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%call = call <2 x float> @alias_v2i64_to_v2f32(<2 x float> %tmp) nounwind
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store <2 x float> %call, <2 x float>* %dest, align 8
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ret void
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}
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define void @bitcast_alias_vector_mismatched_number_elements(<4 x float>* noalias %source, <4 x float>* noalias %dest) nounwind {
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entry:
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; CHECK-LABEL: @bitcast_alias_vector_mismatched_number_elements
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; CHECK: %call = call <4 x float> @alias_v2i32_to_v4f32
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%tmp = load <4 x float>* %source, align 8
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%call = call <4 x float> @alias_v2i32_to_v4f32(<4 x float> %tmp) nounwind
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store <4 x float> %call, <4 x float>* %dest, align 8
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ret void
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}
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define void @bitcast_alias_vector_scalar_mismatched_bit_size(<4 x float>* noalias %source, <4 x float>* noalias %dest) nounwind {
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entry:
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; CHECK-LABEL: @bitcast_alias_vector_scalar_mismatched_bit_size
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; CHECK: %call = call <4 x float> @alias_v4f32_to_i64
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%tmp = load <4 x float>* %source, align 8
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%call = call <4 x float> @alias_v4f32_to_i64(<4 x float> %tmp) nounwind
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store <4 x float> %call, <4 x float>* %dest, align 8
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ret void
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}
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define void @bitcast_alias_vector_ptrs_scalar_mismatched_bit_size(<4 x i32*>* noalias %source, <4 x i32*>* noalias %dest) nounwind {
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entry:
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; CHECK-LABEL: @bitcast_alias_vector_ptrs_scalar_mismatched_bit_size
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; CHECK: @alias_v4i32p_to_i64
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%tmp = load <4 x i32*>* %source, align 8
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%call = call <4 x i32*> @alias_v4i32p_to_i64(<4 x i32*> %tmp) nounwind
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store <4 x i32*> %call, <4 x i32*>* %dest, align 8
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ret void
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}
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define void @bitcast_alias_scalar_vector_ptrs_same_size(i64* noalias %source, i64* noalias %dest) nounwind {
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entry:
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; CHECK-LABEL: @bitcast_alias_scalar_vector_ptrs_same_size
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; CHECK: @alias_i64_to_v2i32p
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%tmp = load i64* %source, align 8
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%call = call i64 @alias_i64_to_v2i32p(i64 %tmp) nounwind
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store i64 %call, i64* %dest, align 8
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ret void
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}
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define void @bitcast_alias_scalar_vector_mismatched_bit_size(i64* noalias %source, i64* noalias %dest) nounwind {
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entry:
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; CHECK-LABEL: @bitcast_alias_scalar_vector_mismatched_bit_size
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; CHECK: call i64 @alias_i64_to_v4f32
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%tmp = load i64* %source, align 8
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%call = call i64 @alias_i64_to_v4f32(i64 %tmp) nounwind
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store i64 %call, i64* %dest, align 8
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ret void
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}
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