b21663cb5b
This fixes an expensive chesk failure after 8476a5d480304. The issue was essentially that getRegClassConstraintEffectForVReg was not doing anything useful, sometimes. If the register passed to it is not present in the instruction, it is a no-op and returns the original classe. The Edit->getReg() register may not be the register as it appears in either the use or def instruction. It may be some split register, so take the register directly from the instruction being rematerialized. Also directly query the constraint from the def instruction, with a hardcoded operand index. This isn't ideal, but all the other rematerialize code makes the same assumption. So far I've been unable to reproduce this with a standalone MIR test. In the original case, stop-before=greedy and running the one pass is not working.
260 lines
11 KiB
LLVM
260 lines
11 KiB
LLVM
; RUN: llc -o - %s | FileCheck %s
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; Make sure RegAllocGreedy/SplitKit do not produce invalid liveness information
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; and crash when splitting a liverange twice and rematerializing each time.
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; (Sorry for the testcase; this was ran through bugpoint and then manually
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; reduced for several hours but is still big...)
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target triple = "thumbv7-apple-ios"
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%struct.ham = type { %struct.wombat.0 }
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%struct.wombat.0 = type { %struct.barney }
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%struct.barney = type { %struct.snork.1 }
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%struct.snork.1 = type { %struct.wobble.2 }
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%struct.wobble.2 = type { %struct.blam }
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%struct.blam = type { i32, i32, ptr }
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%struct.ham.3 = type { %struct.pluto }
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%struct.pluto = type { ptr, %struct.snork.5, %struct.wibble }
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%struct.zot = type { ptr }
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%struct.blam.4 = type <{ %struct.zot, ptr, ptr, i8, [3 x i8] }>
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%struct.snork.5 = type { %struct.quux }
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%struct.quux = type { %struct.zot }
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%struct.wibble = type { %struct.widget }
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%struct.widget = type { i32 }
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%struct.bar = type { %struct.spam }
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%struct.spam = type { ptr, %struct.wobble, %struct.zot.7 }
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%struct.wobble = type { %struct.wibble.6 }
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%struct.wibble.6 = type { %struct.zot }
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%struct.zot.7 = type { %struct.ham.8 }
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%struct.ham.8 = type { i32 }
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%struct.hoge = type { %struct.ham, %struct.foo }
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%struct.foo = type { float, float }
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%struct.wombat = type { %struct.ham, float }
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%struct.snork = type { %struct.ham.9, [11 x i8] }
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%struct.ham.9 = type { i8 }
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@global = external global i8
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@global.1 = private constant [20 x i8] c"aaaaaaaaaaaaaaaaaa0\00"
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@global.2 = external constant [27 x i8]
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@global.3 = external global %struct.ham
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@global.4 = external constant [47 x i8]
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@global.5 = external constant [61 x i8]
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@global.6 = external constant [40 x i8]
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@global.7 = external constant [24 x i8]
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@global.8 = external constant [20 x i8]
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@global.9 = external global %struct.ham
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@global.10 = external global %struct.ham
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@global.11 = external global %struct.ham
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@global.12 = external global %struct.ham
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@global.13 = external global %struct.ham
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@global.14 = external global %struct.ham
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@global.15 = external global %struct.ham
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@global.16 = external global %struct.ham
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@global.17 = external global %struct.ham
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@global.18 = external constant [35 x i8]
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@global.19 = external global %struct.ham
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@global.20 = external constant [53 x i8]
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@global.21 = external global %struct.ham
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@global.22 = external global %struct.ham
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@global.23 = external global %struct.ham
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@global.24 = external constant [32 x i8]
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@global.25 = external global %struct.ham
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@global.26 = external constant [47 x i8]
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@global.27 = external global %struct.ham
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@global.28 = external constant [45 x i8]
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@global.29 = external global %struct.ham
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@global.30 = external global %struct.ham
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@global.31 = external constant [24 x i8]
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@global.32 = external global %struct.ham
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@global.33 = external global %struct.ham
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@global.34 = external global %struct.ham
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@global.35 = external global %struct.ham
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@global.36 = external constant [27 x i8]
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@global.37 = external global %struct.ham
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@global.38 = external constant [10 x i8]
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@global.39 = external global %struct.ham
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@global.40 = external global %struct.ham
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@global.41 = external global %struct.ham
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@global.42 = external global %struct.ham
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@global.43 = external global %struct.ham
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@global.44 = external constant [41 x i8]
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@global.45 = external global %struct.ham
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@global.46 = external global %struct.ham
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@global.47 = external global %struct.ham
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@global.48 = external global %struct.ham
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@global.49 = external constant [52 x i8]
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@global.50 = external constant [47 x i8]
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@global.51 = external global %struct.ham
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@global.52 = external global %struct.ham
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@global.53 = external global %struct.ham
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@global.54 = external global %struct.ham
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@global.55 = external global %struct.ham.3
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@global.56 = external global %struct.bar
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@global.57 = external global i8
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declare ptr @bar(ptr returned)
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declare i32 @__cxa_atexit(ptr, ptr, ptr)
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declare ptr @wobble(ptr returned, ptr )
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declare i32 @quux(...)
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declare ptr @_Znwm(i32)
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declare i32 @wobble.58(ptr, [1 x i32], ptr , ptr )
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declare i32 @widget(ptr, [1 x i32], ptr , ptr )
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; Just check we didn't crash and did output something...
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; CHECK-LABEL: func:
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; CHECK: trap
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define internal void @func() section "__TEXT,__StaticInit,regular,pure_instructions" personality ptr @quux {
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%tmp = tail call i32 @__cxa_atexit(ptr @bar, ptr @global.3, ptr @global) #0
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%tmp2 = invoke ptr @wobble(ptr undef, ptr @global.9)
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to label %bb14 unwind label %bbunwind
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bb14:
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%tmp15 = getelementptr i8, ptr undef, i32 12
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store i8 0, ptr %tmp15
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%tmp16 = icmp eq i8 undef, 0
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br i1 %tmp16, label %bb28, label %bb18
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bb18:
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br i1 undef, label %bb21, label %bb29
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bb21:
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%tmp22 = call ptr @_Znwm(i32 16)
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store i32 17, ptr @global.10
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%tmp23 = call ptr @_Znwm(i32 32)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 undef, ptr align 1 @global.2, i32 26, i1 false)
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store i32 33, ptr @global.11
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store i32 23, ptr getelementptr (%struct.ham, ptr @global.11, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 1)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 undef, ptr align 1 @global.7, i32 23, i1 false)
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%tmp24 = call i32 @__cxa_atexit(ptr @bar, ptr @global.11, ptr @global) #0
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store i32 49, ptr @global.12
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store i32 37, ptr getelementptr (%struct.ham, ptr @global.13, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 1)
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call void @llvm.memset.p0.i32(ptr align 4 @global.14, i8 0, i32 12, i1 false)
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%tmp25 = call ptr @_Znwm(i32 48)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 %tmp25, ptr align 1 @global.6, i32 39, i1 false)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 undef, ptr align 1 @global.4, i32 46, i1 false)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 undef, ptr align 1 @global.5, i32 60, i1 false)
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%tmp26 = call ptr @_Znwm(i32 48)
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store i32 65, ptr @global.15
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%tmp27 = icmp eq i8 undef, 0
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br i1 %tmp27, label %bb30, label %bb33
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bb28:
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call void @llvm.trap()
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unreachable
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bb29:
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call void @llvm.trap()
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unreachable
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bb30:
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%tmp31 = icmp eq i32 undef, 37
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br i1 %tmp31, label %bb32, label %bb30
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bb32:
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store i8 1, ptr @global.57
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br label %bb33
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bb33:
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%tmp34 = call ptr @_Znwm(i32 32)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 undef, ptr align 1 @global.1, i32 19, i1 false)
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store i32 17, ptr @global.16
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store i32 65, ptr @global.17
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 undef, ptr align 1 @global.18, i32 34, i1 false)
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store i32 65, ptr @global.19
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 undef, ptr align 1 @global.20, i32 52, i1 false)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 undef, ptr align 1 @global.8, i32 19, i1 false)
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store i32 37, ptr getelementptr (%struct.ham, ptr @global.21, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 1)
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%tmp35 = call ptr @_Znwm(i32 32)
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store i8 16, ptr @global.22
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%tmp36 = call ptr @_Znwm(i32 32)
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store i32 31, ptr getelementptr (%struct.ham, ptr @global.23, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 1)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 %tmp36, ptr align 1 @global.24, i32 31, i1 false)
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%tmp37 = getelementptr i8, ptr %tmp36, i32 31
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store i8 0, ptr %tmp37
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 undef, ptr align 1 @global.26, i32 46, i1 false)
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%tmp38 = call i32 @__cxa_atexit(ptr @bar, ptr @global.25, ptr @global) #0
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%tmp39 = call ptr @_Znwm(i32 48)
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store i32 44, ptr getelementptr (%struct.ham, ptr @global.27, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 1)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 %tmp39, ptr align 1 @global.28, i32 44, i1 false)
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%tmp40 = getelementptr i8, ptr %tmp39, i32 44
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store i8 0, ptr %tmp40
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call void @llvm.memset.p0.i32(ptr align 4 @global.29, i8 0, i32 12, i1 false)
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%tmp41 = call ptr @_Znwm(i32 32)
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store i32 23, ptr getelementptr (%struct.ham, ptr @global.30, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 1)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 %tmp41, ptr align 1 @global.31, i32 23, i1 false)
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%tmp42 = getelementptr i8, ptr %tmp41, i32 23
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store i8 0, ptr %tmp42
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call void @llvm.memset.p0.i32(ptr align 4 @global.32, i8 0, i32 12, i1 false)
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store i8 16, ptr @global.32
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%tmp43 = call i32 @__cxa_atexit(ptr @bar, ptr @global.33, ptr @global) #0
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%tmp44 = call ptr @_Znwm(i32 16)
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call void @llvm.memset.p0.i32(ptr align 4 @global.34, i8 0, i32 12, i1 false)
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call void @llvm.memset.p0.i32(ptr align 4 @global.9, i8 0, i32 12, i1 false)
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%tmp45 = call ptr @_Znwm(i32 32)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 %tmp45, ptr align 1 @global.36, i32 26, i1 false)
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call void @llvm.memset.p0.i32(ptr align 4 @global.37, i8 0, i32 12, i1 false)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 getelementptr (%struct.snork, ptr @global.37, i32 0, i32 1, i32 0), ptr align 1 @global.38, i32 9, i1 false)
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store i32 17, ptr @global.39
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%tmp46 = call i32 @__cxa_atexit(ptr @bar, ptr @global.40, ptr @global) #0
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%tmp47 = call ptr @_Znwm(i32 32)
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%tmp48 = getelementptr i8, ptr %tmp47, i32 21
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store i8 0, ptr %tmp48
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store i32 33, ptr @global.41
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store i32 15, ptr getelementptr (%struct.ham, ptr @global.42, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 1)
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%tmp49 = call i32 @__cxa_atexit(ptr @bar, ptr @global.43, ptr @global) #0
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 undef, ptr align 1 @global.44, i32 40, i1 false)
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%tmp50 = call i32 @__cxa_atexit(ptr @bar, ptr @global.45, ptr @global) #0
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%tmp51 = call i32 @__cxa_atexit(ptr @bar, ptr @global.46, ptr @global) #0
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%tmp52 = call ptr @_Znwm(i32 32)
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store ptr %tmp52, ptr getelementptr (%struct.ham, ptr @global.47, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 2)
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 undef, ptr align 1 @global.49, i32 51, i1 false)
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%tmp53 = call i32 @__cxa_atexit(ptr @bar, ptr @global.48, ptr @global) #0
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call void @llvm.memcpy.p0.p0.i32(ptr align 1 undef, ptr align 1 @global.50, i32 46, i1 false)
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store i32 33, ptr @global.51
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store i32 37, ptr getelementptr (%struct.ham, ptr @global.52, i32 0, i32 0, i32 0, i32 0, i32 0, i32 0, i32 1)
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%tmp54 = invoke ptr @wobble(ptr undef, ptr @global.54)
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to label %bb58 unwind label %bbunwind
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bb58:
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%tmp59 = invoke i32 @wobble.58(ptr @global.55, [1 x i32] [i32 ptrtoint (ptr getelementptr (%struct.ham.3, ptr @global.55, i32 0, i32 0, i32 1, i32 0, i32 0) to i32)], ptr undef, ptr undef)
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to label %bb71 unwind label %bbunwind
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bb71:
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%tmp72 = invoke i32 @widget(ptr @global.56, [1 x i32] [i32 ptrtoint (ptr getelementptr (%struct.bar, ptr @global.56, i32 0, i32 0, i32 1, i32 0, i32 0) to i32)], ptr undef, ptr undef)
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to label %bb73 unwind label %bbunwind
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bb73:
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ret void
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bbunwind:
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%tmp75 = landingpad { ptr, i32 }
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cleanup
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resume { ptr, i32 } undef
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}
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; CHECK-LABEL: func_reduced_remat_regclass_error:
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define void @func_reduced_remat_regclass_error(ptr %global.10, ptr %global.15) {
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bb14:
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store i32 999, ptr %global.10, align 4
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call void @llvm.memset.p0.i32(ptr null, i8 0, i32 12, i1 false)
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call void @llvm.memcpy.p0.p0.i32(ptr null, ptr null, i32 60, i1 false)
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%tmp34 = call ptr @_Znwm()
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store i32 999, ptr %global.15, align 4
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call void @llvm.memcpy.p0.p0.i32(ptr %global.10, ptr null, i32 52, i1 false)
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call void @llvm.memset.p0.i32(ptr null, i8 0, i32 12, i1 false)
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call void @llvm.memset.p0.i32(ptr null, i8 0, i32 12, i1 false)
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ret void
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}
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declare void @llvm.trap()
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declare void @llvm.memcpy.p0.p0.i32(ptr , ptr , i32, i1)
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declare void @llvm.memset.p0.i32(ptr , i8, i32, i1)
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attributes #0 = { nounwind }
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