llvm/test/CodeGen/AArch64/GlobalISel/irtranslator-hoisted-constants.ll

   1 ; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 2
   2 ; RUN: llc -mtriple=aarch64-apple-ios -global-isel -stop-after=irtranslator %s -o - | FileCheck %s --check-prefix=TRANSLATED
   3 ; RUN: llc -mtriple=aarch64-apple-ios -global-isel -stop-before=instruction-select %s -o - | FileCheck %s --check-prefix=PRESELECTION
   4 ; RUN: llc -mtriple=aarch64-apple-ios -global-isel -stop-after=instruction-select %s -o - | FileCheck %s --check-prefix=POSTSELECTION
   5
   6 ; Check we generate G_CONSTANT_FOLD_BARRIER of constants and don't fold them, since they're
   7 ; used by constant hoisting to prevent constant folding/propagation.
   8
   9 declare void @callee()
  10
  11 define i32 @test(i32 %a, i1 %c) {
  12   ; TRANSLATED-LABEL: name: test
  13   ; TRANSLATED: bb.1.entry:
  14   ; TRANSLATED-NEXT:   successors: %bb.3(0x40000000), %bb.2(0x40000000)
  15   ; TRANSLATED-NEXT:   liveins: $w0, $w1
  16   ; TRANSLATED-NEXT: {{  $}}
  17   ; TRANSLATED-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY $w0
  18   ; TRANSLATED-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY $w1
  19   ; TRANSLATED-NEXT:   [[TRUNC:%[0-9]+]]:_(s8) = G_TRUNC [[COPY1]](s32)
  20   ; TRANSLATED-NEXT:   [[ASSERT_ZEXT:%[0-9]+]]:_(s8) = G_ASSERT_ZEXT [[TRUNC]], 1
  21   ; TRANSLATED-NEXT:   [[TRUNC1:%[0-9]+]]:_(s1) = G_TRUNC [[ASSERT_ZEXT]](s8)
  22   ; TRANSLATED-NEXT:   [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 100000
  23   ; TRANSLATED-NEXT:   [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
  24   ; TRANSLATED-NEXT:   [[CONSTANT_FOLD_BARRIER:%[0-9]+]]:_(s32) = G_CONSTANT_FOLD_BARRIER [[C]]
  25   ; TRANSLATED-NEXT:   G_BRCOND [[TRUNC1]](s1), %bb.3
  26   ; TRANSLATED-NEXT:   G_BR %bb.2
  27   ; TRANSLATED-NEXT: {{  $}}
  28   ; TRANSLATED-NEXT: bb.2.common.ret:
  29   ; TRANSLATED-NEXT:   [[PHI:%[0-9]+]]:_(s32) = G_PHI %7(s32), %bb.3, [[C1]](s32), %bb.1
  30   ; TRANSLATED-NEXT:   $w0 = COPY [[PHI]](s32)
  31   ; TRANSLATED-NEXT:   RET_ReallyLR implicit $w0
  32   ; TRANSLATED-NEXT: {{  $}}
  33   ; TRANSLATED-NEXT: bb.3.cont:
  34   ; TRANSLATED-NEXT:   successors: %bb.2(0x80000000)
  35   ; TRANSLATED-NEXT: {{  $}}
  36   ; TRANSLATED-NEXT:   [[ADD:%[0-9]+]]:_(s32) = G_ADD [[COPY]], [[CONSTANT_FOLD_BARRIER]]
  37   ; TRANSLATED-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $sp, implicit $sp
  38   ; TRANSLATED-NEXT:   BL @callee, csr_darwin_aarch64_aapcs, implicit-def $lr, implicit $sp
  39   ; TRANSLATED-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $sp, implicit $sp
  40   ; TRANSLATED-NEXT:   G_BR %bb.2
  41   ; PRESELECTION-LABEL: name: test
  42   ; PRESELECTION: bb.1.entry:
  43   ; PRESELECTION-NEXT:   successors: %bb.3(0x40000000), %bb.2(0x40000000)
  44   ; PRESELECTION-NEXT:   liveins: $w0, $w1
  45   ; PRESELECTION-NEXT: {{  $}}
  46   ; PRESELECTION-NEXT:   [[COPY:%[0-9]+]]:gpr(s32) = COPY $w0
  47   ; PRESELECTION-NEXT:   [[COPY1:%[0-9]+]]:gpr(s32) = COPY $w1
  48   ; PRESELECTION-NEXT:   [[TRUNC:%[0-9]+]]:gpr(s8) = G_TRUNC [[COPY1]](s32)
  49   ; PRESELECTION-NEXT:   [[ASSERT_ZEXT:%[0-9]+]]:gpr(s8) = G_ASSERT_ZEXT [[TRUNC]], 1
  50   ; PRESELECTION-NEXT:   [[C:%[0-9]+]]:gpr(s32) = G_CONSTANT i32 0
  51   ; PRESELECTION-NEXT:   [[C1:%[0-9]+]]:gpr(s32) = G_CONSTANT i32 100000
  52   ; PRESELECTION-NEXT:   [[CONSTANT_FOLD_BARRIER:%[0-9]+]]:gpr(s32) = G_CONSTANT_FOLD_BARRIER [[C1]]
  53   ; PRESELECTION-NEXT:   [[C2:%[0-9]+]]:gpr(s32) = G_CONSTANT i32 1
  54   ; PRESELECTION-NEXT:   [[ANYEXT:%[0-9]+]]:gpr(s32) = G_ANYEXT [[ASSERT_ZEXT]](s8)
  55   ; PRESELECTION-NEXT:   [[AND:%[0-9]+]]:gpr(s32) = G_AND [[ANYEXT]], [[C2]]
  56   ; PRESELECTION-NEXT:   G_BRCOND [[AND]](s32), %bb.3
  57   ; PRESELECTION-NEXT:   G_BR %bb.2
  58   ; PRESELECTION-NEXT: {{  $}}
  59   ; PRESELECTION-NEXT: bb.2.common.ret:
  60   ; PRESELECTION-NEXT:   [[PHI:%[0-9]+]]:gpr(s32) = G_PHI %7(s32), %bb.3, [[C]](s32), %bb.1
  61   ; PRESELECTION-NEXT:   $w0 = COPY [[PHI]](s32)
  62   ; PRESELECTION-NEXT:   RET_ReallyLR implicit $w0
  63   ; PRESELECTION-NEXT: {{  $}}
  64   ; PRESELECTION-NEXT: bb.3.cont:
  65   ; PRESELECTION-NEXT:   successors: %bb.2(0x80000000)
  66   ; PRESELECTION-NEXT: {{  $}}
  67   ; PRESELECTION-NEXT:   [[ADD:%[0-9]+]]:gpr(s32) = G_ADD [[COPY]], [[CONSTANT_FOLD_BARRIER]]
  68   ; PRESELECTION-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $sp, implicit $sp
  69   ; PRESELECTION-NEXT:   BL @callee, csr_darwin_aarch64_aapcs, implicit-def $lr, implicit $sp
  70   ; PRESELECTION-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $sp, implicit $sp
  71   ; PRESELECTION-NEXT:   G_BR %bb.2
  72   ; POSTSELECTION-LABEL: name: test
  73   ; POSTSELECTION: bb.1.entry:
  74   ; POSTSELECTION-NEXT:   successors: %bb.3(0x40000000), %bb.2(0x40000000)
  75   ; POSTSELECTION-NEXT:   liveins: $w0, $w1
  76   ; POSTSELECTION-NEXT: {{  $}}
  77   ; POSTSELECTION-NEXT:   [[COPY:%[0-9]+]]:gpr32 = COPY $w0
  78   ; POSTSELECTION-NEXT:   [[COPY1:%[0-9]+]]:gpr32 = COPY $w1
  79   ; POSTSELECTION-NEXT:   [[COPY2:%[0-9]+]]:gpr32 = COPY $wzr
  80   ; POSTSELECTION-NEXT:   [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 100000
  81   ; POSTSELECTION-NEXT:   TBNZW [[COPY1]], 0, %bb.3
  82   ; POSTSELECTION-NEXT:   B %bb.2
  83   ; POSTSELECTION-NEXT: {{  $}}
  84   ; POSTSELECTION-NEXT: bb.2.common.ret:
  85   ; POSTSELECTION-NEXT:   [[PHI:%[0-9]+]]:gpr32 = PHI %7, %bb.3, [[COPY2]], %bb.1
  86   ; POSTSELECTION-NEXT:   $w0 = COPY [[PHI]]
  87   ; POSTSELECTION-NEXT:   RET_ReallyLR implicit $w0
  88   ; POSTSELECTION-NEXT: {{  $}}
  89   ; POSTSELECTION-NEXT: bb.3.cont:
  90   ; POSTSELECTION-NEXT:   successors: %bb.2(0x80000000)
  91   ; POSTSELECTION-NEXT: {{  $}}
  92   ; POSTSELECTION-NEXT:   [[ADDWrr:%[0-9]+]]:gpr32 = ADDWrr [[COPY]], [[MOVi32imm]]
  93   ; POSTSELECTION-NEXT:   ADJCALLSTACKDOWN 0, 0, implicit-def $sp, implicit $sp
  94   ; POSTSELECTION-NEXT:   BL @callee, csr_darwin_aarch64_aapcs, implicit-def $lr, implicit $sp
  95   ; POSTSELECTION-NEXT:   ADJCALLSTACKUP 0, 0, implicit-def $sp, implicit $sp
  96   ; POSTSELECTION-NEXT:   B %bb.2
  97 entry:
  98   %hc = bitcast i32 100000 to i32
  99   br i1 %c, label %cont, label %end
 100 cont:
 101   %add = add i32 %a, %hc
 102   call void @callee()
 103   ret i32 %add
 104 end:
 105   ret i32 0
 106 }
 107