2018-02-28 03:26:02 +08:00
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# RUN: llc -mtriple=arm-none-eabi -run-pass=arm-cp-islands %s -o - | FileCheck %s
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#
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# This checks alignment of a block when a CPE is placed before/after a
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# block (as e.g. opposed to splitting up a block), and also make sure
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# we don't decrease alignment.
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#
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--- |
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; ModuleID = '<stdin>'
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source_filename = "<stdin>"
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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "arm-arm--eabi"
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declare i32 @llvm.arm.space(i32, i32) #0
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define dso_local i32 @CP() #1 {
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entry:
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%res = alloca half, align 2
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store half 0xH706B, half* %res, align 2
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%0 = load half, half* %res, align 2
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%tobool = fcmp une half %0, 0xH0000
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br i1 %tobool, label %LA, label %END
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LA: ; preds = %entry
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%1 = call i32 @llvm.arm.space(i32 1000, i32 undef)
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br label %END
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END: ; preds = %LA, %entry
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%2 = call i32 @llvm.arm.space(i32 100, i32 undef)
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ret i32 42
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}
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; Function Attrs: nounwind
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declare void @llvm.stackprotector(i8*, i8**) #2
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attributes #0 = { nounwind "target-features"="+v8.2a,+fullfp16" }
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attributes #1 = { "target-features"="+v8.2a,+fullfp16" }
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attributes #2 = { nounwind }
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...
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---
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name: CP
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[Alignment] Use llvm::Align in MachineFunction and TargetLowering - fixes mir parsing
Summary:
This catches malformed mir files which specify alignment as log2 instead of pow2.
See https://reviews.llvm.org/D65945 for reference,
This is patch is part of a series to introduce an Alignment type.
See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html
See this patch for the introduction of the type: https://reviews.llvm.org/D64790
Reviewers: courbet
Subscribers: MatzeB, qcolombet, dschuff, arsenm, sdardis, nemanjai, jvesely, nhaehnle, hiraditya, kbarton, asb, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, jrtc27, MaskRay, zzheng, edward-jones, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, jsji, Petar.Avramovic, asbirlea, s.egerton, pzheng, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D67433
llvm-svn: 371608
2019-09-11 19:16:48 +08:00
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alignment: 4
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2018-02-28 03:26:02 +08:00
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exposesReturnsTwice: false
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legalized: false
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regBankSelected: false
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selected: false
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tracksRegLiveness: true
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registers:
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liveins:
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frameInfo:
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isFrameAddressTaken: false
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isReturnAddressTaken: false
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hasStackMap: false
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hasPatchPoint: false
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stackSize: 4
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offsetAdjustment: 0
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maxAlignment: 2
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adjustsStack: false
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hasCalls: false
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stackProtector: ''
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maxCallFrameSize: 0
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hasOpaqueSPAdjustment: false
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hasVAStart: false
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hasMustTailInVarArgFunc: false
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savePoint: ''
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restorePoint: ''
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fixedStack:
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stack:
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- { id: 0, name: res, type: default, offset: -2, size: 2, alignment: 2,
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2019-06-17 17:13:29 +08:00
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stack-id: default, callee-saved-register: '', callee-saved-restored: true,
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2018-04-26 02:58:06 +08:00
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local-offset: -2, debug-info-variable: '', debug-info-expression: '',
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debug-info-location: '' }
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2018-02-28 03:26:02 +08:00
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constants:
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- id: 0
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value: half 0xH706B
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alignment: 2
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isTargetSpecific: false
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[LLVM][Alignment] Make functions using log of alignment explicit
Summary:
This patch renames functions that takes or returns alignment as log2, this patch will help with the transition to llvm::Align.
The renaming makes it explicit that we deal with log(alignment) instead of a power of two alignment.
A few renames uncovered dubious assignments:
- `MirParser`/`MirPrinter` was expecting powers of two but `MachineFunction` and `MachineBasicBlock` were using deal with log2(align). This patch fixes it and updates the documentation.
- `MachineBlockPlacement` exposes two flags (`align-all-blocks` and `align-all-nofallthru-blocks`) supposedly interpreted as power of two alignments, internally these values are interpreted as log2(align). This patch updates the documentation,
- `MachineFunctionexposes` exposes `align-all-functions` also interpreted as power of two alignment, internally this value is interpreted as log2(align). This patch updates the documentation,
Reviewers: lattner, thegameg, courbet
Subscribers: dschuff, arsenm, jyknight, dylanmckay, sdardis, nemanjai, jvesely, nhaehnle, javed.absar, hiraditya, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, jrtc27, MaskRay, zzheng, edward-jones, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, dexonsmith, PkmX, jocewei, jsji, Jim, s.egerton, llvm-commits, courbet
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D65945
llvm-svn: 371045
2019-09-05 18:00:22 +08:00
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#CHECK: bb.{{.*}} (align 2):
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2018-02-28 03:26:02 +08:00
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#CHECK: successors:
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#CHECK: CONSTPOOL_ENTRY 1, %const{{.*}}, 2
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#
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# We don't want to decrease alignment if the block already has been
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2019-01-31 07:09:28 +08:00
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# aligned; this can e.g. be an existing CPE that has been carefully
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# aligned. Here BB.1.LA has already an 8-byte alignment, and we are
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2018-02-28 03:26:02 +08:00
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# checking we don't set it to 4:
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#
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2019-01-31 07:09:28 +08:00
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#CHECK: bb.{{.*}}.LA (align 8):
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2018-02-28 03:26:02 +08:00
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body: |
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bb.0.entry:
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successors: %bb.1(0x50000000), %bb.2(0x30000000)
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$sp = frame-setup SUBri $sp, 4, 14, $noreg, $noreg
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frame-setup CFI_INSTRUCTION def_cfa_offset 4
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2021-05-20 10:25:51 +08:00
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renamable $s0 = VLDRH %const.0, 0, 14, $noreg :: (load (s16) from constant-pool)
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2018-02-28 03:26:02 +08:00
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VCMPZH renamable $s0, 14, $noreg, implicit-def $fpscr_nzcv
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2021-05-20 10:25:51 +08:00
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VSTRH killed renamable $s0, $sp, 1, 14, $noreg :: (store (s16) into %ir.res)
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2018-02-28 03:26:02 +08:00
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FMSTAT 14, $noreg, implicit-def $cpsr, implicit killed $fpscr_nzcv
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Bcc %bb.2, 0, killed $cpsr
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2019-01-31 07:09:28 +08:00
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bb.1.LA (align 8):
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2018-02-28 03:26:02 +08:00
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successors: %bb.2(0x80000000)
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dead renamable $r0 = SPACE 1000, undef renamable $r0
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bb.2.END:
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dead renamable $r0 = SPACE 100, undef renamable $r0
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$r0 = MOVi 42, 14, $noreg, $noreg
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$sp = ADDri $sp, 4, 14, $noreg, $noreg
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BX_RET 14, $noreg, implicit killed $r0
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...
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