mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-25 14:30:32 +00:00
1afcace3a3
patch brings numerous advantages to LLVM. One way to look at it is through diffstat: 109 files changed, 3005 insertions(+), 5906 deletions(-) Removing almost 3K lines of code is a good thing. Other advantages include: 1. Value::getType() is a simple load that can be CSE'd, not a mutating union-find operation. 2. Types a uniqued and never move once created, defining away PATypeHolder. 3. Structs can be "named" now, and their name is part of the identity that uniques them. This means that the compiler doesn't merge them structurally which makes the IR much less confusing. 4. Now that there is no way to get a cycle in a type graph without a named struct type, "upreferences" go away. 5. Type refinement is completely gone, which should make LTO much MUCH faster in some common cases with C++ code. 6. Types are now generally immutable, so we can use "Type *" instead "const Type *" everywhere. Downsides of this patch are that it removes some functions from the C API, so people using those will have to upgrade to (not yet added) new API. "LLVM 3.0" is the right time to do this. There are still some cleanups pending after this, this patch is large enough as-is. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134829 91177308-0d34-0410-b5e6-96231b3b80d8
108 lines
3.4 KiB
LLVM
108 lines
3.4 KiB
LLVM
; RUN: opt < %s -scalarrepl -S | FileCheck %s
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; PR3290
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target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64"
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;; Store of integer to whole alloca struct.
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define i32 @test1(i64 %V) nounwind {
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; CHECK: test1
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; CHECK-NOT: alloca
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%X = alloca {{i32, i32}}
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%Y = bitcast {{i32,i32}}* %X to i64*
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store i64 %V, i64* %Y
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%A = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 0
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%B = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 1
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%a = load i32* %A
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%b = load i32* %B
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%c = add i32 %a, %b
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ret i32 %c
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}
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;; Store of integer to whole struct/array alloca.
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define float @test2(i128 %V) nounwind {
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; CHECK: test2
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; CHECK-NOT: alloca
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%X = alloca {[4 x float]}
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%Y = bitcast {[4 x float]}* %X to i128*
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store i128 %V, i128* %Y
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%A = getelementptr {[4 x float]}* %X, i32 0, i32 0, i32 0
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%B = getelementptr {[4 x float]}* %X, i32 0, i32 0, i32 3
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%a = load float* %A
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%b = load float* %B
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%c = fadd float %a, %b
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ret float %c
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}
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;; Load of whole alloca struct as integer
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define i64 @test3(i32 %a, i32 %b) nounwind {
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; CHECK: test3
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; CHECK-NOT: alloca
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%X = alloca {{i32, i32}}
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%A = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 0
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%B = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 1
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store i32 %a, i32* %A
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store i32 %b, i32* %B
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%Y = bitcast {{i32,i32}}* %X to i64*
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%Z = load i64* %Y
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ret i64 %Z
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}
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;; load of integer from whole struct/array alloca.
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define i128 @test4(float %a, float %b) nounwind {
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; CHECK: test4
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; CHECK-NOT: alloca
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%X = alloca {[4 x float]}
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%A = getelementptr {[4 x float]}* %X, i32 0, i32 0, i32 0
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%B = getelementptr {[4 x float]}* %X, i32 0, i32 0, i32 3
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store float %a, float* %A
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store float %b, float* %B
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%Y = bitcast {[4 x float]}* %X to i128*
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%V = load i128* %Y
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ret i128 %V
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}
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;; If the elements of a struct or array alloca contain padding, SROA can still
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;; split up the alloca as long as there is no padding between the elements.
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%padded = type { i16, i8 }
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define void @test5([4 x %padded]* %p, [4 x %padded]* %q) {
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entry:
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; CHECK: test5
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; CHECK-NOT: i128
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%var = alloca [4 x %padded], align 4
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%vari8 = bitcast [4 x %padded]* %var to i8*
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%pi8 = bitcast [4 x %padded]* %p to i8*
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %vari8, i8* %pi8, i32 16, i32 4, i1 false)
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%qi8 = bitcast [4 x %padded]* %q to i8*
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %qi8, i8* %vari8, i32 16, i32 4, i1 false)
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ret void
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}
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;; Check that an array alloca can be split up when it is also accessed with
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;; a load or store as a homogeneous structure with the same element type and
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;; number of elements as the array.
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%homogeneous = type { <8 x i16>, <8 x i16>, <8 x i16> }
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%wrapped_array = type { [3 x <8 x i16>] }
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define void @test6(i8* %p, %wrapped_array* %arr) {
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entry:
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; CHECK: test6
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; CHECK: store <8 x i16>
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; CHECK: store <8 x i16>
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; CHECK: store <8 x i16>
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%var = alloca %wrapped_array, align 16
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%res = call %homogeneous @test6callee(i8* %p)
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%varcast = bitcast %wrapped_array* %var to %homogeneous*
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store %homogeneous %res, %homogeneous* %varcast
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%tmp1 = bitcast %wrapped_array* %arr to i8*
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%tmp2 = bitcast %wrapped_array* %var to i8*
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %tmp1, i8* %tmp2, i32 48, i32 16, i1 false)
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ret void
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}
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declare %homogeneous @test6callee(i8* nocapture) nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
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