mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-29 10:32:47 +00:00
6ea2b9608a
Also avoid locals evicting locals just because they want a cheaper register. Problem: MI Sched knows exactly how many registers we have and assumes they can be colored. In cases where we have large blocks, usually from unrolled loops, greedy coloring fails. This is a source of "regressions" from the MI Scheduler on x86. I noticed this issue on x86 where we have long chains of two-address defs in the same live range. It's easy to see this in matrix multiplication benchmarks like IRSmk and even the unit test misched-matmul.ll. A fundamental difference between the LLVM register allocator and conventional graph coloring is that in our model a live range can't discover its neighbors, it can only verify its neighbors. That's why we initially went for greedy coloring and added eviction to deal with the hard cases. However, for singly defined and two-address live ranges, we can optimally color without visiting neighbors simply by processing the live ranges in instruction order. Other beneficial side effects: It is much easier to understand and debug regalloc for large blocks when the live ranges are allocated in order. Yes, global allocation is still very confusing, but it's nice to be able to comprehend what happened locally. Heuristics could be added to bias register assignment based on instruction locality (think late register pairing, banks...). Intuituvely this will make some test cases that are on the threshold of register pressure more stable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187139 91177308-0d34-0410-b5e6-96231b3b80d8
226 lines
12 KiB
LLVM
226 lines
12 KiB
LLVM
; RUN: llc < %s -mcpu=cortex-a15 -verify-machineinstrs | FileCheck %s
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; Check a spill right after a function call with large struct byval is correctly
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; generated.
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; PR16393
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; CHECK: set_stored_macroblock_parameters
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; CHECK: str r{{.*}}, [sp, [[SLOT:#[0-9]+]]] @ 4-byte Spill
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; CHECK: bl RestoreMVBlock8x8
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; CHECK: bl RestoreMVBlock8x8
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; CHECK: bl RestoreMVBlock8x8
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; CHECK: ldr r{{.*}}, [sp, [[SLOT]]] @ 4-byte Reload
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target triple = "armv7l-unknown-linux-gnueabihf"
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%structA = type { double, [16 x [16 x i16]], [16 x [16 x i16]], [16 x [16 x i16]], i32****, i32***, i32, i16, [4 x i32], [4 x i32], i8**, [16 x i8], [16 x i8], i32, i64, i32, i16******, i16******, [2 x [4 x [4 x i8]]], i32, i32, i32, i32, i32, i32, i32, i32, i32 }
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%structB = type { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, float, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i8**, i8**, i32, i32***, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, [9 x [16 x [16 x i16]]], [5 x [16 x [16 x i16]]], [9 x [8 x [8 x i16]]], [2 x [4 x [16 x [16 x i16]]]], [16 x [16 x i16]], [16 x [16 x i32]], i32****, i32***, i32***, i32***, i32****, i32****, %structC*, %structD*, %structK*, i32*, i32*, i32, i32, i32, i32, [4 x [4 x i32]], i32, i32, i32, i32, i32, double, i32, i32, i32, i32, i16******, i16******, i16******, i16******, [15 x i16], i32, i32, i32, i32, i32, i32, i32, i32, [6 x [32 x i32]], i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, [1 x i32], i32, i32, [2 x i32], i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, %structL*, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, double**, double***, i32***, double**, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, [3 x [2 x i32]], [2 x i32], i32, i32, i16, i32, i32, i32, i32, i32 }
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%structC = type { i32, i32, [100 x %structD*], i32, float, float, float }
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%structD = type { i32, i32, i32, i32, i32, i32, %structE*, %structH*, %structJ*, i32, i32*, i32*, i32*, i32, i32*, i32*, i32*, i32 (i32)*, [3 x [2 x i32]] }
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%structE = type { %structF*, %structG, %structG }
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%structF = type { i32, i32, i8, i32, i32, i8, i8, i32, i32, i8*, i32 }
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%structG = type { i32, i32, i32, i32, i32, i8*, i32*, i32, i32 }
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%structH = type { [3 x [11 x %structI]], [2 x [9 x %structI]], [2 x [10 x %structI]], [2 x [6 x %structI]], [4 x %structI], [4 x %structI], [3 x %structI] }
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%structI = type { i16, i8, i32 }
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%structJ = type { [2 x %structI], [4 x %structI], [3 x [4 x %structI]], [10 x [4 x %structI]], [10 x [15 x %structI]], [10 x [15 x %structI]], [10 x [5 x %structI]], [10 x [5 x %structI]], [10 x [15 x %structI]], [10 x [15 x %structI]] }
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%structK = type { i32, i32, i32, [2 x i32], i32, [8 x i32], %structK*, %structK*, i32, [2 x [4 x [4 x [2 x i32]]]], [16 x i8], [16 x i8], i32, i64, [4 x i32], [4 x i32], i64, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i16, double, i32, i32, i32, i32, i32, i32, i32, i32, i32 }
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%structL = type { i32, i32, i32, i32, i32, %structL* }
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%structM = type { i32, i32, i32, i32, i32, i32, [6 x [33 x i64]], [6 x [33 x i64]], [6 x [33 x i64]], [6 x [33 x i64]], i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i16**, i16****, i16****, i16*****, i16***, i8*, i8***, i64***, i64***, i16****, i8**, i8**, %structM*, %structM*, %structM*, i32, i32, i32, i32, i32, i32, i32 }
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%structN = type { i32, [16 x [16 x i32]], [16 x [16 x i32]], [16 x [16 x i32]], [3 x [16 x [16 x i32]]], [4 x i16], [4 x i8], [4 x i8], [4 x i8], [16 x [16 x i16]], [16 x [16 x i16]], [16 x [16 x i32]] }
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@cofAC = external global i32****, align 4
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@cofDC = external global i32***, align 4
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@rdopt = external global %structA*, align 4
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@img = external global %structB*
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@enc_picture = external global %structM*
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@si_frame_indicator = external global i32, align 4
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@sp2_frame_indicator = external global i32, align 4
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@lrec = external global i32**, align 4
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@tr8x8 = external global %structN, align 4
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@best_mode = external global i16, align 2
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@best_c_imode = external global i32, align 4
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@best_i16offset = external global i32, align 4
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@bi_pred_me = external global i16, align 2
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@b8mode = external global [4 x i32], align 4
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@b8pdir = external global [4 x i32], align 4
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@b4_intra_pred_modes = external global [16 x i8], align 1
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@b8_intra_pred_modes8x8 = external global [16 x i8], align 1
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@b4_ipredmode = external global [16 x i8], align 1
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@b8_ipredmode8x8 = external global [4 x [4 x i8]], align 1
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@rec_mbY = external global [16 x [16 x i16]], align 2
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@lrec_rec = external global [16 x [16 x i32]], align 4
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@rec_mbU = external global [16 x [16 x i16]], align 2
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@rec_mbV = external global [16 x [16 x i16]], align 2
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@lrec_rec_U = external global [16 x [16 x i32]], align 4
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@lrec_uv = external global i32***, align 4
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@lrec_rec_V = external global [16 x [16 x i32]], align 4
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@cbp = external global i32, align 4
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@cbp_blk = external global i64, align 8
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@luma_transform_size_8x8_flag = external global i32, align 4
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@frefframe = external global [4 x [4 x i8]], align 1
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@brefframe = external global [4 x [4 x i8]], align 1
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; Function Attrs: nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) #0
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; Function Attrs: nounwind
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declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) #0
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; Function Attrs: nounwind
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declare void @SetMotionVectorsMB(%structK* nocapture, i32) #1
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; Function Attrs: nounwind
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define void @set_stored_macroblock_parameters() #1 {
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entry:
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%0 = load %structB** @img, align 4, !tbaa !0
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%1 = load i32* undef, align 4, !tbaa !3
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%mb_data = getelementptr inbounds %structB* %0, i32 0, i32 61
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%2 = load %structK** %mb_data, align 4, !tbaa !0
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br label %for.body
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for.body: ; preds = %for.body, %entry
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br i1 undef, label %for.end, label %for.body
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for.end: ; preds = %for.body
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br i1 undef, label %for.body20, label %if.end
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for.body20: ; preds = %for.end
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unreachable
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if.end: ; preds = %for.end
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br i1 undef, label %if.end40, label %for.cond31.preheader
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for.cond31.preheader: ; preds = %if.end
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unreachable
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if.end40: ; preds = %if.end
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br i1 undef, label %if.end43, label %if.then42
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if.then42: ; preds = %if.end40
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br label %if.end43
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if.end43: ; preds = %if.then42, %if.end40
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br i1 undef, label %if.end164, label %for.cond47.preheader
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for.cond47.preheader: ; preds = %if.end43
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br i1 undef, label %for.body119, label %if.end164
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for.body119: ; preds = %for.body119, %for.cond47.preheader
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br i1 undef, label %for.body119, label %if.end164
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if.end164: ; preds = %for.body119, %for.cond47.preheader, %if.end43
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store i32*** null, i32**** @cofDC, align 4, !tbaa !0
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%mb_type = getelementptr inbounds %structK* %2, i32 %1, i32 8
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br i1 undef, label %if.end230, label %if.then169
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if.then169: ; preds = %if.end164
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br i1 undef, label %for.cond185.preheader, label %for.cond210.preheader
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for.cond185.preheader: ; preds = %if.then169
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unreachable
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for.cond210.preheader: ; preds = %if.then169
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unreachable
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if.end230: ; preds = %if.end164
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tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* undef, i8* bitcast ([4 x i32]* @b8mode to i8*), i32 16, i32 4, i1 false)
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%b8pdir = getelementptr inbounds %structK* %2, i32 %1, i32 15
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%3 = bitcast [4 x i32]* %b8pdir to i8*
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tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %3, i8* bitcast ([4 x i32]* @b8pdir to i8*), i32 16, i32 4, i1 false)
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br i1 undef, label %if.end236, label %if.then233
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if.then233: ; preds = %if.end230
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unreachable
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if.end236: ; preds = %if.end230
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%cmp242 = icmp ne i16 undef, 8
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%4 = load i32* @luma_transform_size_8x8_flag, align 4, !tbaa !3
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%tobool245 = icmp ne i32 %4, 0
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%or.cond812 = or i1 %cmp242, %tobool245
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br i1 %or.cond812, label %if.end249, label %land.lhs.true246
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land.lhs.true246: ; preds = %if.end236
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br i1 undef, label %if.end249, label %if.then248
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if.then248: ; preds = %land.lhs.true246
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tail call void asm sideeffect "", "~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11}"() nounwind
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tail call void @RestoreMVBlock8x8(i32 1, i32 0, %structN* byval @tr8x8, i32 0) #0
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tail call void @RestoreMVBlock8x8(i32 1, i32 2, %structN* byval @tr8x8, i32 0) #0
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tail call void @RestoreMVBlock8x8(i32 1, i32 3, %structN* byval @tr8x8, i32 0) #0
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br label %if.end249
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if.end249: ; preds = %if.then248, %land.lhs.true246, %if.end236
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%5 = load i32* @luma_transform_size_8x8_flag, align 4, !tbaa !3
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%6 = load %structA** @rdopt, align 4, !tbaa !0
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%luma_transform_size_8x8_flag264 = getelementptr inbounds %structA* %6, i32 0, i32 21
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store i32 %5, i32* %luma_transform_size_8x8_flag264, align 4, !tbaa !3
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%7 = load i32* undef, align 4, !tbaa !3
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%add281 = add nsw i32 %7, 0
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br label %for.body285
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for.body285: ; preds = %for.inc503, %if.end249
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%8 = phi %structB* [ undef, %if.end249 ], [ %.pre1155, %for.inc503 ]
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%i.21103 = phi i32 [ 0, %if.end249 ], [ %inc504, %for.inc503 ]
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%block_x286 = getelementptr inbounds %structB* %8, i32 0, i32 37
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%9 = load i32* %block_x286, align 4, !tbaa !3
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%add287 = add nsw i32 %9, %i.21103
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%shr289 = ashr i32 %i.21103, 1
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%add290 = add nsw i32 %shr289, 0
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%arrayidx292 = getelementptr inbounds %structK* %2, i32 %1, i32 15, i32 %add290
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%10 = load %structM** @enc_picture, align 4, !tbaa !0
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%ref_idx = getelementptr inbounds %structM* %10, i32 0, i32 35
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%11 = load i8**** %ref_idx, align 4, !tbaa !0
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%12 = load i8*** %11, align 4, !tbaa !0
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%arrayidx313 = getelementptr inbounds i8** %12, i32 %add281
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%13 = load i8** %arrayidx313, align 4, !tbaa !0
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%arrayidx314 = getelementptr inbounds i8* %13, i32 %add287
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store i8 -1, i8* %arrayidx314, align 1, !tbaa !1
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%14 = load %structB** @img, align 4, !tbaa !0
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%MbaffFrameFlag327 = getelementptr inbounds %structB* %14, i32 0, i32 100
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%15 = load i32* %MbaffFrameFlag327, align 4, !tbaa !3
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%tobool328 = icmp eq i32 %15, 0
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br i1 %tobool328, label %if.end454, label %if.then329
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if.then329: ; preds = %for.body285
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%16 = load %structA** @rdopt, align 4, !tbaa !0
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br label %if.end454
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if.end454: ; preds = %if.then329, %for.body285
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%17 = load i32* %arrayidx292, align 4, !tbaa !3
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%cmp457 = icmp eq i32 %17, 0
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br i1 %cmp457, label %if.then475, label %lor.lhs.false459
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lor.lhs.false459: ; preds = %if.end454
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%18 = load i32* %mb_type, align 4, !tbaa !3
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switch i32 %18, label %for.inc503 [
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i32 9, label %if.then475
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i32 10, label %if.then475
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i32 13, label %if.then475
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i32 14, label %if.then475
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]
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if.then475: ; preds = %lor.lhs.false459, %lor.lhs.false459, %lor.lhs.false459, %lor.lhs.false459, %if.end454
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store i16 0, i16* undef, align 2, !tbaa !4
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br label %for.inc503
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for.inc503: ; preds = %if.then475, %lor.lhs.false459
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%inc504 = add nsw i32 %i.21103, 1
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%.pre1155 = load %structB** @img, align 4, !tbaa !0
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br label %for.body285
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}
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; Function Attrs: nounwind
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declare void @update_offset_params(i32, i32) #1
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; Function Attrs: nounwind
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declare void @RestoreMVBlock8x8(i32, i32, %structN* byval nocapture, i32) #1
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attributes #0 = { nounwind }
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attributes #1 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
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!0 = metadata !{metadata !"any pointer", metadata !1}
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!1 = metadata !{metadata !"omnipotent char", metadata !2}
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!2 = metadata !{metadata !"Simple C/C++ TBAA"}
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!3 = metadata !{metadata !"int", metadata !1}
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!4 = metadata !{metadata !"short", metadata !1}
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