mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 18:54:02 +01:00
a94851d3fb
If we had a pair of copies inside a loop which introduced new liveness to a subregister which was undef before the loop, we would have a dummy phi-only segment remaining across the loop body. Later, this false segment would confuse RenameIndependentSubregs causing it to introduce IMPLICIT_DEFs with broken value numbering. It seems always adding the lanes to ShrinkMask is OK, so any conditions should be purely a compile time filter.
432 lines
12 KiB
YAML
432 lines
12 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx906 -verify-coalescing -verify-machineinstrs -start-before=simple-register-coalescing -stop-after=machine-scheduler -o - %s | FileCheck %s
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# Tests that break due to the handling of partially undef registers
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# when whole register identity copies are erased.
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# Make sure there is no verifier error after
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# RenameIndepependentSubregs processes this. The coalescer would
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# remove the identity copy in %bb.1, and leave behind a dummy interval
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# across bb.1 with no corresponding value anywhere in the function.
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---
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name: identity_copy_undef_subrange
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: identity_copy_undef_subrange
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: undef %0.sub1:vreg_64 = COPY $vgpr0
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)
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; CHECK: S_CBRANCH_EXECNZ %bb.1, implicit $exec
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; CHECK: S_BRANCH %bb.2
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; CHECK: bb.2:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: undef %0.sub1:vreg_64 = nofpexcept V_CEIL_F32_e32 %0.sub1, implicit $mode, implicit $exec
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; CHECK: S_BRANCH %bb.1
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bb.0:
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liveins: $vgpr0
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undef %0.sub1:vreg_64 = COPY killed $vgpr0
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bb.1:
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successors: %bb.2, %bb.1
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%0:vreg_64 = COPY %0
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S_CBRANCH_EXECNZ %bb.1, implicit $exec
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S_BRANCH %bb.2
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bb.2:
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undef %0.sub1:vreg_64 = nofpexcept V_CEIL_F32_e32 killed %0.sub1, implicit $mode, implicit $exec
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S_BRANCH %bb.1
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...
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# Test another use of the register inside the block.
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---
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name: identity_copy_undef_subrange_other_uses0
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: identity_copy_undef_subrange_other_uses0
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: undef %0.sub1:vreg_64 = COPY $vgpr0
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)
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; CHECK: S_NOP 0, implicit undef %0.sub0
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; CHECK: S_NOP 0, implicit undef %0.sub0
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; CHECK: S_CBRANCH_EXECNZ %bb.1, implicit $exec
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; CHECK: S_BRANCH %bb.2
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; CHECK: bb.2:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: undef %0.sub1:vreg_64 = nofpexcept V_CEIL_F32_e32 %0.sub1, implicit $mode, implicit $exec
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; CHECK: S_BRANCH %bb.1
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bb.0:
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liveins: $vgpr0
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undef %0.sub1:vreg_64 = COPY killed $vgpr0
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bb.1:
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successors: %bb.2, %bb.1
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%0:vreg_64 = COPY %0
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S_NOP 0, implicit %0.sub0
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S_NOP 0, implicit %0.sub0
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S_CBRANCH_EXECNZ %bb.1, implicit $exec
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S_BRANCH %bb.2
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bb.2:
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undef %0.sub1:vreg_64 = nofpexcept V_CEIL_F32_e32 killed %0.sub1, implicit $mode, implicit $exec
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S_BRANCH %bb.1
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...
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---
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name: second_identity_copy
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: second_identity_copy
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: undef %0.sub1:vreg_64 = COPY $vgpr0
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)
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; CHECK: S_CBRANCH_EXECNZ %bb.1, implicit $exec
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; CHECK: S_BRANCH %bb.2
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; CHECK: bb.2:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: undef %0.sub1:vreg_64 = nofpexcept V_MUL_F32_e32 0, %0.sub1, implicit $mode, implicit $exec
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; CHECK: S_BRANCH %bb.1
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bb.0:
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liveins: $vgpr0
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undef %0.sub1:vreg_64 = COPY killed $vgpr0
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bb.1:
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successors: %bb.2, %bb.1
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%0:vreg_64 = COPY killed %0
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%0:vreg_64 = COPY %0
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S_CBRANCH_EXECNZ %bb.1, implicit $exec
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S_BRANCH %bb.2
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bb.2:
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undef %0.sub1:vreg_64 = nofpexcept V_MUL_F32_e32 0, killed %0.sub1, implicit $mode, implicit $exec
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S_BRANCH %bb.1
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...
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---
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name: second_identity_copy_undef_lane_outblock
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: second_identity_copy_undef_lane_outblock
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: undef %0.sub1:vreg_64 = COPY $vgpr0
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)
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; CHECK: S_CBRANCH_EXECNZ %bb.1, implicit $exec
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; CHECK: S_BRANCH %bb.2
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; CHECK: bb.2:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: %0.sub1:vreg_64 = nofpexcept V_MUL_F32_e32 0, %0.sub1, implicit $mode, implicit $exec
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; CHECK: S_BRANCH %bb.1
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bb.0:
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liveins: $vgpr0
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undef %0.sub1:vreg_64 = COPY killed $vgpr0
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bb.1:
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successors: %bb.2, %bb.1
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%0:vreg_64 = COPY killed %0
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%0:vreg_64 = COPY %0
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S_CBRANCH_EXECNZ %bb.1, implicit $exec
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S_BRANCH %bb.2
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bb.2:
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%0.sub1:vreg_64 = nofpexcept V_MUL_F32_e32 0, killed %0.sub1, implicit $mode, implicit $exec
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S_BRANCH %bb.1
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...
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# The same value number appears in multiple blocks
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---
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name: identity_copy_undef_subrange_null_vninfo_to_remove
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: identity_copy_undef_subrange_null_vninfo_to_remove
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: undef %0.sub1:vreg_64 = COPY $vgpr0
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; CHECK: bb.1:
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; CHECK: successors: %bb.3(0x40000000), %bb.2(0x40000000)
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; CHECK: S_CBRANCH_EXECNZ %bb.3, implicit $exec
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; CHECK: bb.2:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: S_NOP 0, implicit undef %0.sub0
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; CHECK: undef %0.sub1:vreg_64 = nofpexcept V_CEIL_F32_e32 %0.sub1, implicit $mode, implicit $exec
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; CHECK: S_BRANCH %bb.1
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; CHECK: bb.3:
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; CHECK: S_NOP 0, implicit undef %0.sub0
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bb.0:
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liveins: $vgpr0
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undef %0.sub1:vreg_64 = COPY killed $vgpr0
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bb.1:
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%0:vreg_64 = COPY %0
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S_CBRANCH_EXECNZ %bb.3, implicit $exec
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bb.2:
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S_NOP 0, implicit %0.sub0
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undef %0.sub1:vreg_64 = nofpexcept V_CEIL_F32_e32 killed %0.sub1, implicit $mode, implicit $exec
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S_BRANCH %bb.1
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bb.3:
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S_NOP 0, implicit %0.sub0
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...
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---
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name: undef_copy_self_loop0
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: undef_copy_self_loop0
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: undef %0.sub1:vreg_64 = COPY $vgpr0
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; CHECK: bb.1:
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; CHECK: successors: %bb.1(0x40000000), %bb.2(0x40000000)
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; CHECK: S_CBRANCH_EXECNZ %bb.1, implicit $exec
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; CHECK: bb.2:
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; CHECK: S_NOP 0, implicit undef %0.sub0
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bb.0:
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liveins: $vgpr0
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undef %0.sub1:vreg_64 = COPY killed $vgpr0
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bb.1:
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%0:vreg_64 = COPY %0
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S_CBRANCH_EXECNZ %bb.1, implicit $exec
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bb.2:
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S_NOP 0, implicit %0.sub0
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...
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---
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name: undef_copy_self_loop1
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: undef_copy_self_loop1
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: undef %0.sub1:vreg_64 = COPY $vgpr0
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; CHECK: bb.1:
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; CHECK: successors: %bb.1(0x40000000), %bb.2(0x40000000)
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; CHECK: S_CBRANCH_EXECNZ %bb.1, implicit $exec
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; CHECK: bb.2:
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; CHECK: S_NOP 0, implicit %0.sub1
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bb.0:
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liveins: $vgpr0
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undef %0.sub1:vreg_64 = COPY killed $vgpr0
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bb.1:
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%0:vreg_64 = COPY %0
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S_CBRANCH_EXECNZ %bb.1, implicit $exec
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bb.2:
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S_NOP 0, implicit %0.sub1
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...
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# The coalescing of the %0 = %2 COPY in %bb.2 needs to prune the dead
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# phi range across %bb.1 after it is erased.
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---
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name: prune_subrange_phi_value_0
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: prune_subrange_phi_value_0
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: undef %2.sub1:vreg_64 = COPY $vgpr0
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)
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; CHECK: S_CBRANCH_EXECNZ %bb.1, implicit $exec
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; CHECK: S_BRANCH %bb.2
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; CHECK: bb.2:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: S_BRANCH %bb.1
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bb.0:
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liveins: $vgpr0
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undef %0.sub1:vreg_64 = COPY killed $vgpr0
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bb.1:
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successors: %bb.2, %bb.1
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%1:vreg_64 = COPY killed %0
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%0:vreg_64 = COPY %1
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S_CBRANCH_EXECNZ %bb.1, implicit $exec
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S_BRANCH %bb.2
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bb.2:
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undef %2.sub1:vreg_64 = COPY %0.sub1
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%0:vreg_64 = COPY killed %2
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S_BRANCH %bb.1
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...
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---
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name: prune_subrange_phi_value_0_0
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: prune_subrange_phi_value_0_0
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: undef %0.sub1:vreg_64 = COPY $vgpr0
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)
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; CHECK: S_CBRANCH_EXECNZ %bb.1, implicit $exec
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; CHECK: S_BRANCH %bb.2
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; CHECK: bb.2:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: S_BRANCH %bb.1
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bb.0:
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liveins: $vgpr0
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undef %0.sub1:vreg_64 = COPY killed $vgpr0
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bb.1:
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successors: %bb.2, %bb.1
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%1:vreg_64 = COPY killed %0
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%0:vreg_64 = COPY %1
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S_CBRANCH_EXECNZ %bb.1, implicit $exec
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S_BRANCH %bb.2
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bb.2:
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undef %0.sub1:vreg_64 = COPY %0.sub1
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S_BRANCH %bb.1
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...
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---
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name: prune_subrange_phi_value_0_1
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: prune_subrange_phi_value_0_1
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: undef %0.sub1:vreg_64 = COPY $vgpr0
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)
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; CHECK: S_CBRANCH_EXECNZ %bb.1, implicit $exec
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; CHECK: S_BRANCH %bb.2
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; CHECK: bb.2:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: S_BRANCH %bb.1
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bb.0:
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liveins: $vgpr0
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undef %0.sub1:vreg_64 = COPY killed $vgpr0
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bb.1:
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successors: %bb.2, %bb.1
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%1:vreg_64 = COPY killed %0
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%0:vreg_64 = COPY %1
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S_CBRANCH_EXECNZ %bb.1, implicit $exec
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S_BRANCH %bb.2
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bb.2:
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S_BRANCH %bb.1
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...
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# Variant of testcase that asserts since there wasn't already an
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# incoming segment at the erased copy, and no valid end point.
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---
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name: prune_subrange_phi_value_1
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: prune_subrange_phi_value_1
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: undef %0.sub1:vreg_64 = COPY $vgpr0
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)
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; CHECK: S_CBRANCH_EXECNZ %bb.1, implicit $exec
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; CHECK: S_BRANCH %bb.2
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; CHECK: bb.2:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: undef %0.sub1:vreg_64 = nofpexcept V_CEIL_F32_e32 %0.sub1, implicit $mode, implicit $exec
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; CHECK: S_BRANCH %bb.1
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bb.0:
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liveins: $vgpr0
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undef %0.sub1:vreg_64 = COPY killed $vgpr0
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bb.1:
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successors: %bb.2, %bb.1
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%0:vreg_64 = COPY killed %0
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S_CBRANCH_EXECNZ %bb.1, implicit $exec
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S_BRANCH %bb.2
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bb.2:
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undef %1.sub1:vreg_64 = nofpexcept V_CEIL_F32_e32 killed %0.sub1, implicit $mode, implicit $exec
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%0:vreg_64 = COPY killed %1
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S_BRANCH %bb.1
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...
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---
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name: prune_subrange_phi_value_2
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: prune_subrange_phi_value_2
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $vgpr0
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; CHECK: undef %0.sub1:vreg_64 = COPY $vgpr0
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)
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; CHECK: S_CBRANCH_EXECNZ %bb.1, implicit $exec
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; CHECK: S_BRANCH %bb.2
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; CHECK: bb.2:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: %0.sub1:vreg_64 = nofpexcept V_CEIL_F32_e32 %0.sub1, implicit $mode, implicit $exec
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; CHECK: S_BRANCH %bb.1
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bb.0:
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liveins: $vgpr0
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undef %0.sub1:vreg_64 = COPY killed $vgpr0
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bb.1:
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successors: %bb.2, %bb.1
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%0:vreg_64 = COPY killed %0
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S_CBRANCH_EXECNZ %bb.1, implicit $exec
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S_BRANCH %bb.2
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bb.2:
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%0.sub1:vreg_64 = nofpexcept V_CEIL_F32_e32 %0.sub1, implicit $mode, implicit $exec
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S_BRANCH %bb.1
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...
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