mirror of
https://github.com/RPCS3/llvm-mirror.git
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8a152514d8
Summary: In our CHERI fork we use BUNDLE instructions to ensure that a three-instruction sequence to generate a program-counter-relative value is emitted without reordering or insertions (since that would break the 32-bit offset computation). Currently MipsAsmPrinter asserts when it encounters a pseudo instruction. To handle BUNDLE we can simply skip the instruction which will then make EmitInstruction() process the contents of the bundle in order. Reviewers: atanasyan Reviewed By: atanasyan Subscribers: merge_guards_bot, sdardis, hiraditya, jrtc27, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D70945
154 lines
5.0 KiB
YAML
154 lines
5.0 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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## Check that the delay-slot filler does not attempt to split BUNDLE instructions
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# RUN: llc %s -start-before=mips-delay-slot-filler -stop-after=mips-delay-slot-filler \
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# RUN: -verify-machineinstrs -o - | FileCheck %s
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## Check that we can emit assembly for input with BUNDLE instructions:
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# RUN: llc %s -start-before=mips-delay-slot-filler -verify-machineinstrs -o - | FileCheck %s -check-prefix ASM
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# ASM: # %bb.0:
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# ASM-NEXT: daddiu $sp, $sp, -16
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# ASM-NEXT: sd $ra, 8($sp)
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## BUNDLE should be emitted in order:
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# ASM-NEXT: daddiu $sp, $sp, -16
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# ASM-NEXT: daddiu $sp, $sp, 16
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# ASM-NEXT: beqz $4, .LBB0_2
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# ASM-NEXT: nop
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--- |
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target datalayout = "E-m:e-i8:8:32-i16:16:32-i64:64-n32:64-S128"
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target triple = "mips64-unknown-freebsd"
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declare i8* @func_a(i64 zeroext)
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declare i8* @func_b(i64 zeroext)
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; Function Attrs: nounwind
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define i8* @test(i64 zeroext %nbytes) local_unnamed_addr #0 {
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entry:
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%cmp = icmp eq i64 %nbytes, 0
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br i1 %cmp, label %if.else, label %if.then
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if.then: ; preds = %entry
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%call = tail call i8* @func_a(i64 zeroext %nbytes)
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br label %return
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if.else: ; preds = %entry
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%call1 = tail call i8* @func_b(i64 zeroext 0)
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br label %return
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return: ; preds = %if.else, %if.then
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%retval.0 = phi i8* [ %call, %if.then ], [ %call1, %if.else ]
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ret i8* %retval.0
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}
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; Function Attrs: nounwind
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declare void @llvm.stackprotector(i8*, i8**) #0
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attributes #0 = { nounwind }
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...
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---
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name: test
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alignment: 8
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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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failedISel: false
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tracksRegLiveness: true
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hasWinCFI: false
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registers: []
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liveins:
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- { reg: '$a0_64', virtual-reg: '' }
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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: 16
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offsetAdjustment: 0
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maxAlignment: 8
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adjustsStack: true
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hasCalls: true
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stackProtector: ''
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maxCallFrameSize: 0
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cvBytesOfCalleeSavedRegisters: 0
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hasOpaqueSPAdjustment: false
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hasVAStart: false
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hasMustTailInVarArgFunc: false
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localFrameSize: 0
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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: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
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stack-id: default, callee-saved-register: '$ra_64', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
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callSites: []
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constants: []
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machineFunctionInfo: {}
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body: |
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; CHECK-LABEL: name: test
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; CHECK: bb.0.entry:
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; CHECK: successors: %bb.2(0x30000000), %bb.1(0x50000000)
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; CHECK: $sp_64 = DADDiu $sp_64, -16
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; CHECK: CFI_INSTRUCTION def_cfa_offset 16
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; CHECK: SD killed $ra_64, $sp_64, 8 :: (store 8 into %stack.0)
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; CHECK: CFI_INSTRUCTION offset $ra_64, -8
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; CHECK: BUNDLE {
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; CHECK: $sp_64 = DADDiu $sp_64, -16
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; CHECK: $sp_64 = DADDiu $sp_64, 16
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; CHECK: }
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; CHECK: BEQ64 renamable $a0_64, $zero_64, %bb.2, implicit-def $at {
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; CHECK: NOP
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; CHECK: }
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; CHECK: bb.1.if.then:
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; CHECK: successors: %bb.3(0x80000000)
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; CHECK: JAL @func_a, csr_n64, implicit-def dead $ra, implicit $a0_64, implicit-def $sp, implicit-def $v0_64 {
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; CHECK: NOP
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; CHECK: }
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; CHECK: J %bb.3, implicit-def dead $at {
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; CHECK: NOP
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; CHECK: }
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; CHECK: bb.2.if.else:
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; CHECK: successors: %bb.3(0x80000000)
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; CHECK: JAL @func_b, csr_n64, implicit-def dead $ra, implicit $a0_64, implicit-def $sp, implicit-def $v0_64 {
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; CHECK: $a0_64 = DADDiu $zero_64, 0
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; CHECK: }
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; CHECK: bb.3.return:
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; CHECK: $ra_64 = LD $sp_64, 8 :: (load 8 from %stack.0)
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; CHECK: PseudoReturn64 undef $ra_64, implicit $v0_64 {
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; CHECK: $sp_64 = DADDiu $sp_64, 16
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; CHECK: }
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bb.0.entry:
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successors: %bb.2(0x30000000), %bb.1(0x50000000)
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liveins: $a0_64, $ra_64
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$sp_64 = DADDiu $sp_64, -16
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CFI_INSTRUCTION def_cfa_offset 16
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SD killed $ra_64, $sp_64, 8 :: (store 8 into %stack.0)
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CFI_INSTRUCTION offset $ra_64, -8
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; This BUNDLE instruction must not be split by the delay slot filler:
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BUNDLE {
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$sp_64 = DADDiu $sp_64, -16
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$sp_64 = DADDiu $sp_64, 16
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}
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BEQ64 renamable $a0_64, $zero_64, %bb.2, implicit-def $at
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bb.1.if.then:
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successors: %bb.3(0x80000000)
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liveins: $a0_64
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JAL @func_a, csr_n64, implicit-def dead $ra, implicit $a0_64, implicit-def $sp, implicit-def $v0_64
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J %bb.3, implicit-def dead $at
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bb.2.if.else:
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successors: %bb.3(0x80000000)
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$a0_64 = DADDiu $zero_64, 0
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JAL @func_b, csr_n64, implicit-def dead $ra, implicit $a0_64, implicit-def $sp, implicit-def $v0_64
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bb.3.return:
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liveins: $v0_64
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$ra_64 = LD $sp_64, 8 :: (load 8 from %stack.0)
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$sp_64 = DADDiu $sp_64, 16
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PseudoReturn64 undef $ra_64, implicit $v0_64
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...
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