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      1 # RUN: llc -march=hexagon -run-pass hexagon-bit-simplify -o - %s | FileCheck %s
      2 
      3 --- |
      4   @g0 = global i32 0, align 4
      5 
      6   define i32 @f0() { ret i32 0 }
      7   define i32 @f1() { ret i32 0 }
      8   define i32 @f2() { ret i32 0 }
      9   define i32 @f3() { ret i32 0 }
     10   define i32 @f4() { ret i32 0 }
     11   define i32 @f5() { ret i32 0 }
     12   define i32 @f6() { ret i32 0 }
     13   define i32 @f7() { ret i32 0 }
     14 ...
     15 
     16 # Case 0: is-zero with known zero register
     17 # CHECK-LABEL: name: f0
     18 # CHECK: %[[R00:[0-9]+]]:intregs = A2_tfrsi 1
     19 # CHECK: $r0 = COPY %[[R00]]
     20 # CHECK: PS_jmpret $r31, implicit-def dead $pc, implicit $r0
     21 
     22 name: f0
     23 tracksRegLiveness: true
     24 body: |
     25   bb.0:
     26     %0:intregs = A2_tfrsi 0
     27     %2:intregs = A4_rcmpeqi killed %0, 0
     28     $r0 = COPY %2
     29     PS_jmpret $r31, implicit-def dead $pc, implicit $r0
     30 ...
     31 
     32 # Case 1: is-zero with known non-zero register
     33 # CHECK-LABEL: name: f1
     34 # CHECK: %[[R10:[0-9]+]]:intregs = A2_tfrsi 0
     35 # CHECK: $r0 = COPY %[[R10]]
     36 # CHECK: PS_jmpret $r31, implicit-def dead $pc, implicit $r0
     37 
     38 name: f1
     39 tracksRegLiveness: true
     40 body: |
     41   bb.0:
     42     %0:intregs = A2_tfrsi 128
     43     %2:intregs = A4_rcmpeqi killed %0, 0
     44     $r0 = COPY %2
     45     PS_jmpret $r31, implicit-def dead $pc, implicit $r0
     46 ...
     47 
     48 # Case 2: is-not-zero with known zero register
     49 # CHECK-LABEL: name: f2
     50 # CHECK: %[[R20:[0-9]+]]:intregs = A2_tfrsi 0
     51 # CHECK: $r0 = COPY %[[R20]]
     52 # CHECK: PS_jmpret $r31, implicit-def dead $pc, implicit $r0
     53 
     54 name: f2
     55 tracksRegLiveness: true
     56 body: |
     57   bb.0:
     58     %0:intregs = A2_tfrsi 0
     59     %2:intregs = A4_rcmpneqi killed %0, 0
     60     $r0 = COPY %2
     61     PS_jmpret $r31, implicit-def dead $pc, implicit $r0
     62 ...
     63 
     64 # Case 3: is-not-zero with known non-zero register
     65 # CHECK-LABEL: name: f3
     66 # CHECK: %[[R30:[0-9]+]]:intregs = A2_tfrsi 1
     67 # CHECK: $r0 = COPY %[[R30]]
     68 # CHECK: PS_jmpret $r31, implicit-def dead $pc, implicit $r0
     69 
     70 name: f3
     71 tracksRegLiveness: true
     72 body: |
     73   bb.0:
     74     %0:intregs = A2_tfrsi 1024
     75     %2:intregs = A4_rcmpneqi killed %0, 0
     76     $r0 = COPY %2
     77     PS_jmpret $r31, implicit-def dead $pc, implicit $r0
     78 ...
     79 
     80 
     81 # Case 4: is-zero with mux(p, 1, 0)
     82 # CHECK-LABEL: name: f4
     83 # CHECK: %[[R40:[0-9]+]]:predregs = COPY $p0
     84 # CHECK: %[[R41:[0-9]+]]:intregs = C2_muxii %[[R40]], 0, 1
     85 # CHECK: $r0 = COPY %[[R41]]
     86 # CHECK: PS_jmpret $r31, implicit-def dead $pc, implicit $r0
     87 
     88 name: f4
     89 tracksRegLiveness: true
     90 body: |
     91   bb.0:
     92     liveins: $p0
     93     %0:predregs = COPY $p0
     94     %1:intregs = C2_muxii %0, 1, 0
     95     %2:intregs = A4_rcmpeqi killed %1, 0
     96     $r0 = COPY %2
     97     PS_jmpret $r31, implicit-def dead $pc, implicit $r0
     98 ...
     99 
    100 # Case 5: is-zero with mux(p, 0, 1)
    101 # CHECK-LABEL: name: f5
    102 # CHECK: %[[R50:[0-9]+]]:predregs = COPY $p0
    103 # CHECK: %[[R51:[0-9]+]]:intregs = C2_muxii %[[R50]], 1, 0
    104 # CHECK: $r0 = COPY %[[R51]]
    105 # CHECK: PS_jmpret $r31, implicit-def dead $pc, implicit $r0
    106 
    107 name: f5
    108 tracksRegLiveness: true
    109 body: |
    110   bb.0:
    111     liveins: $p0
    112     %0:predregs = COPY $p0
    113     %1:intregs = C2_muxii %0, 0, 1
    114     %2:intregs = A4_rcmpeqi killed %1, 0
    115     $r0 = COPY %2
    116     PS_jmpret $r31, implicit-def dead $pc, implicit $r0
    117 ...
    118 
    119 # Case 6: is-not-zero with mux(p, 1, 2)
    120 # CHECK-LABEL: name: f6
    121 # CHECK: %[[R60:[0-9]+]]:intregs = A2_tfrsi 1
    122 # CHECK: $r0 = COPY %[[R60]]
    123 # CHECK: PS_jmpret $r31, implicit-def dead $pc, implicit $r0
    124 
    125 name: f6
    126 tracksRegLiveness: true
    127 body: |
    128   bb.0:
    129     liveins: $p0
    130     %0:predregs = COPY $p0
    131     %1:intregs = C2_muxii %0, 1, 2
    132     %2:intregs = A4_rcmpneqi killed %1, 0
    133     $r0 = COPY %2
    134     PS_jmpret $r31, implicit-def dead $pc, implicit $r0
    135 ...
    136 
    137 # Case 7: is-not-zero with mux(p, @g0, 2)
    138 # CHECK-LABEL: name: f7
    139 # CHECK: %[[R70:[0-9]+]]:intregs = A2_tfrsi 1
    140 # CHECK: $r0 = COPY %[[R70]]
    141 # CHECK: PS_jmpret $r31, implicit-def dead $pc, implicit $r0
    142 
    143 name: f7
    144 tracksRegLiveness: true
    145 body: |
    146   bb.0:
    147     liveins: $p0
    148     %0:predregs = COPY $p0
    149     %1:intregs = C2_muxii %0, @g0, 2
    150     %2:intregs = A4_rcmpneqi killed %1, 0
    151     $r0 = COPY %2
    152     PS_jmpret $r31, implicit-def dead $pc, implicit $r0
    153 ...
    154 
    155