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b7b3e8e261
Record internal state based on register units. This is often more efficient as there are typically fewer register units to update compared to iterating over all the aliases of a register. Original patch by Matthias Braun, but I've been rebasing and fixing it for almost 2 years and fixed a few bugs causing intermediate failures to make this patch independent of the changes in https://reviews.llvm.org/D52010.
67 lines
2.3 KiB
YAML
67 lines
2.3 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -mtriple=x86_64-grtev4-linux-gnu -run-pass=regallocfast -o - %s | FileCheck %s
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# Bug 41973. Make sure %12 is detected as live out of %bb.0, even
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# though the use is allocated before the def block %bb.3. Previously
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# mayLiveOut only recorded on defs, and would not find the virtual
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# register use if it had already been replace with a physical
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# register.
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---
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name: main
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: main
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; CHECK: bb.0:
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; CHECK: successors: %bb.3(0x80000000)
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; CHECK: liveins: $edi, $rsi
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; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, killed $rsi :: (store 8 into %stack.0)
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; CHECK: JMP_1 %bb.3
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; CHECK: bb.1:
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; CHECK: successors:
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; CHECK: bb.2:
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; CHECK: successors: %bb.3(0x80000000)
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; CHECK: $rax = MOV64rm %stack.1, 1, $noreg, 0, $noreg :: (load 8 from %stack.1)
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; CHECK: renamable $ecx = MOV32r0 implicit-def $eflags
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; CHECK: renamable $rcx = SUBREG_TO_REG 0, killed renamable $ecx, %subreg.sub_32bit
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; CHECK: MOV64mi32 killed renamable $rax, 1, $noreg, 0, $noreg, 0 :: (volatile store 8)
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; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, killed $rcx :: (store 8 into %stack.0)
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; CHECK: bb.3:
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; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)
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; CHECK: $rax = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
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; CHECK: renamable $ecx = MOV32r0 implicit-def dead $eflags
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; CHECK: renamable $rcx = SUBREG_TO_REG 0, killed renamable $ecx, %subreg.sub_32bit
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; CHECK: MOV64mr %stack.1, 1, $noreg, 0, $noreg, killed $rcx :: (store 8 into %stack.1)
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; CHECK: JMP64r killed renamable $rax
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bb.0:
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liveins: $edi, $rsi
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%4:gr64 = COPY $rsi
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%2:gr32 = COPY $edi
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%3:gr32 = COPY killed %2
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%5:gr64 = COPY killed %4
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%13:gr64 = COPY %5
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JMP_1 %bb.3
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bb.1:
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successors:
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bb.2:
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%0:gr64 = COPY %12
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%10:gr32 = MOV32r0 implicit-def $eflags
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%11:gr64 = SUBREG_TO_REG 0, %10, %subreg.sub_32bit
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MOV64mi32 %0, 1, $noreg, 0, $noreg, 0 :: (volatile store 8)
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%13:gr64 = COPY %11
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bb.3:
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successors: %bb.2, %bb.1
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%1:gr64 = COPY %13
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%9:gr32 = MOV32r0 implicit-def dead $eflags
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%8:gr64 = SUBREG_TO_REG 0, killed %9, %subreg.sub_32bit
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%12:gr64 = COPY %8
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JMP64r %1
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...
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