test/CodeGen/AMDGPU/GlobalISel/knownbits-ptrtoint.mir

# NOTE: Assertions have been autogenerated by utils/update_givaluetracking_test_checks.py UTC_ARGS: --version 5
# RUN: llc -mtriple=amdgcn -passes="print<gisel-value-tracking>" %s -filetype=null 2>&1 | FileCheck %s
## Check that we don't incorrectly assume known zeroes for and extend of a truncated ptrtoint
## Test case for https://github.com/llvm/llvm-project/issues/139598
---
## We should see 128 unknown bits.
name:            PtrToInt
body:             |
  bb.0:
  ; CHECK-LABEL: name: @PtrToInt
  ; CHECK-NEXT: %0:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %1:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %2:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %3:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %4:_ KnownBits:???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? SignBits:1
  ; CHECK-NEXT: %5:_ KnownBits:???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? SignBits:1
    %0:_(s32) = COPY $vgpr0
    %1:_(s32) = COPY $vgpr1
    %2:_(s32) = COPY $vgpr2
    %3:_(s32) = COPY $vgpr3
    %4:_(p8) = G_MERGE_VALUES %0(s32), %1(s32), %2(s32), %3(s32)
    %5:_(s128) = G_PTRTOINT %4(p8)
...
---
## We should see 128 high zeroes followed by 128 unknown bits for extending ptrtoint.
name:            PtrToIntExt
body:             |
  bb.0:
  ; CHECK-LABEL: name: @PtrToIntExt
  ; CHECK-NEXT: %0:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %1:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %2:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %3:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %4:_ KnownBits:???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? SignBits:1
  ; CHECK-NEXT: %5:_ KnownBits:00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? SignBits:128
    %0:_(s32) = COPY $vgpr0
    %1:_(s32) = COPY $vgpr1
    %2:_(s32) = COPY $vgpr2
    %3:_(s32) = COPY $vgpr3
    %4:_(p8) = G_MERGE_VALUES %0(s32), %1(s32), %2(s32), %3(s32)
    %5:_(s256) = G_PTRTOINT %4(p8)
...
---
## We should see 48 unknown bits for truncating ptrtoint.
name:            PtrToIntTrunc
body:             |
  bb.0:
  ; CHECK-LABEL: name: @PtrToIntTrunc
  ; CHECK-NEXT: %0:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %1:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %2:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %3:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %4:_ KnownBits:???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? SignBits:1
  ; CHECK-NEXT: %5:_ KnownBits:???????????????????????????????????????????????? SignBits:1
    %0:_(s32) = COPY $vgpr0
    %1:_(s32) = COPY $vgpr1
    %2:_(s32) = COPY $vgpr2
    %3:_(s32) = COPY $vgpr3
    %4:_(p8) = G_MERGE_VALUES %0(s32), %1(s32), %2(s32), %3(s32)
    %5:_(s48) = G_PTRTOINT %4(p8)
...
---
## This is the test for issue 139598: Truncating and then extending the
## G_PTRTOINT result was filling all bits above the index bitwidth with known
## zeroes even though the incoming value is completely unknown and G_PTRTOINT.
## is lowered to a bitwise copy.
## We should see all zero high bits with 48 unknown bits.
name:            PtrToIntTruncExplicitExt
body:             |
  bb.0:
  ; CHECK-LABEL: name: @PtrToIntTruncExplicitExt
  ; CHECK-NEXT: %0:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %1:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %2:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %3:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %4:_ KnownBits:???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? SignBits:1
  ; CHECK-NEXT: %5:_ KnownBits:???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? SignBits:1
  ; CHECK-NEXT: %6:_ KnownBits:???????????????????????????????????????????????? SignBits:1
  ; CHECK-NEXT: %7:_ KnownBits:0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000???????????????????????????????????????????????? SignBits:208
    %0:_(s32) = COPY $vgpr0
    %1:_(s32) = COPY $vgpr1
    %2:_(s32) = COPY $vgpr2
    %3:_(s32) = COPY $vgpr3
    %4:_(p8) = G_MERGE_VALUES %0(s32), %1(s32), %2(s32), %3(s32)
    %5:_(s128) = G_PTRTOINT %4(p8)
    %6:_(s48) = G_TRUNC %5(s128)
    %7:_(s256) = G_ZEXT %6(s48)
...
---
## Same test again but this time have the G_PTRTOINT do the truncation.
## We should see all zero high bits with 48 unknown bits.
name:            PtrToIntTruncImplicitExt
body:             |
  bb.0:
  ; CHECK-LABEL: name: @PtrToIntTruncImplicitExt
  ; CHECK-NEXT: %0:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %1:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %2:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %3:_ KnownBits:???????????????????????????????? SignBits:1
  ; CHECK-NEXT: %4:_ KnownBits:???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? SignBits:1
  ; CHECK-NEXT: %5:_ KnownBits:???????????????????????????????????????????????? SignBits:1
  ; CHECK-NEXT: %6:_ KnownBits:0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000???????????????????????????????????????????????? SignBits:208
    %0:_(s32) = COPY $vgpr0
    %1:_(s32) = COPY $vgpr1
    %2:_(s32) = COPY $vgpr2
    %3:_(s32) = COPY $vgpr3
    %4:_(p8) = G_MERGE_VALUES %0(s32), %1(s32), %2(s32), %3(s32)
    %5:_(s48) = G_PTRTOINT %4(p8)
    %6:_(s256) = G_ZEXT %5(s48)
...