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      1 ; RUN: llc -march=hexagon -O2 < %s
      2 ; REQUIRES: asserts
      3 
      4 ; This file used to fail with an "UNREACHABLE executed!" in Post-RA pseudo
      5 ; instruction expansion pass due to a bug in the TwoAddressInstructionPass we
      6 ; were not handling sub register indexes when rewriting tied operands.
      7 
      8 target triple = "hexagon"
      9 
     10 %0 = type { i8, i8, %1, i32, i32, %7, i8, i8, %8, i8, i32, i16, i16, [2500 x i8], i16, i16, i16, i8*, [1024 x i8], i32, i32, i32, i32, i32, i8 }
     11 %1 = type { i8, %2, i8, i8, i32 }
     12 %2 = type { %3 }
     13 %3 = type { i8, [256 x i8], %4, i8, i16, i32 }
     14 %4 = type { %5 }
     15 %5 = type { %6 }
     16 %6 = type { [2 x i64] }
     17 %7 = type { i32, i8 }
     18 %8 = type { %7, i32, i32, %1 }
     19 %9 = type { %10, i8* }
     20 %10 = type { i16, i16, i32 }
     21 %11 = type { i8, i32 }
     22 
     23 @g0 = external hidden global [2 x %0], align 8
     24 @g1 = external hidden constant %9, align 4
     25 @g2 = external hidden constant %9, align 4
     26 @g3 = external hidden constant %9, align 4
     27 @g4 = external hidden constant %9, align 4
     28 
     29 ; Function Attrs: optsize
     30 declare void @f0(%9*, i32, i32, i32) #0
     31 
     32 ; Function Attrs: nounwind optsize ssp
     33 define hidden fastcc void @f1(i64 %a0, i8 zeroext %a1, i8 zeroext %a2) #1 {
     34 b0:
     35   %v0 = alloca %11, align 4
     36   %v1 = icmp ne i8 %a1, 0
     37   %v2 = trunc i64 %a0 to i32
     38   br i1 %v1, label %b1, label %b4
     39 
     40 b1:                                               ; preds = %b0
     41   call void @f0(%9* @g1, i32 %v2, i32 0, i32 0) #2
     42   %v3 = getelementptr inbounds [2 x %0], [2 x %0]* @g0, i32 0, i32 %v2, i32 7
     43   store i8 1, i8* %v3, align 1
     44   %v4 = icmp eq i8 %a2, 0
     45   br i1 %v4, label %b4, label %b2
     46 
     47 b2:                                               ; preds = %b1
     48   %v5 = getelementptr inbounds %11, %11* %v0, i32 0, i32 0
     49   store i8 0, i8* %v5, align 4
     50   %v6 = getelementptr inbounds %11, %11* %v0, i32 0, i32 1
     51   store i32 0, i32* %v6, align 4
     52   %v7 = getelementptr inbounds [2 x %0], [2 x %0]* @g0, i32 0, i32 %v2, i32 3
     53   %v8 = load i32, i32* %v7, align 8
     54   %v9 = getelementptr inbounds [2 x %0], [2 x %0]* @g0, i32 0, i32 %v2, i32 4
     55   %v10 = load i32, i32* %v9, align 4
     56   %v11 = getelementptr inbounds [2 x %0], [2 x %0]* @g0, i32 0, i32 %v2, i32 19
     57   %v12 = load i32, i32* %v11, align 4
     58   %v13 = call zeroext i8 @f2(i64 %a0, i32 %v8, i32 %v10, i32 %v12, i8 zeroext 0, %11* %v0) #2
     59   %v14 = icmp eq i8 %v13, 0
     60   br i1 %v14, label %b4, label %b3
     61 
     62 b3:                                               ; preds = %b2
     63   %v15 = zext i8 %v13 to i32
     64   call void @f0(%9* @g2, i32 %v15, i32 %v2, i32 0) #2
     65   br label %b4
     66 
     67 b4:                                               ; preds = %b3, %b2, %b1, %b0
     68   %v16 = getelementptr inbounds [2 x %0], [2 x %0]* @g0, i32 0, i32 %v2, i32 1
     69   %v17 = load i8, i8* %v16, align 1
     70   %v18 = zext i8 %v17 to i32
     71   switch i32 %v18, label %b14 [
     72     i32 2, label %b11
     73     i32 1, label %b5
     74     i32 4, label %b8
     75     i32 3, label %b11
     76   ]
     77 
     78 b5:                                               ; preds = %b4
     79   call void @f0(%9* @g3, i32 %v2, i32 0, i32 0) #2
     80   br i1 %v1, label %b7, label %b6
     81 
     82 b6:                                               ; preds = %b5
     83   call fastcc void @f3(i64 %a0, i8 zeroext 0, i8 zeroext 1, i32 1) #0
     84   br label %b14
     85 
     86 b7:                                               ; preds = %b5
     87   call fastcc void @f3(i64 %a0, i8 zeroext 0, i8 zeroext 0, i32 1) #0
     88   br label %b14
     89 
     90 b8:                                               ; preds = %b4
     91   call void @f0(%9* @g4, i32 %v2, i32 0, i32 0) #2
     92   %v19 = getelementptr inbounds [2 x %0], [2 x %0]* @g0, i32 0, i32 %v2, i32 6
     93   store i8 1, i8* %v19, align 8
     94   br i1 %v1, label %b10, label %b9
     95 
     96 b9:                                               ; preds = %b8
     97   call fastcc void @f3(i64 %a0, i8 zeroext 0, i8 zeroext 1, i32 1) #0
     98   br label %b14
     99 
    100 b10:                                              ; preds = %b8
    101   call fastcc void @f3(i64 %a0, i8 zeroext 0, i8 zeroext 0, i32 1) #0
    102   br label %b14
    103 
    104 b11:                                              ; preds = %b4, %b4
    105   br i1 %v1, label %b13, label %b12
    106 
    107 b12:                                              ; preds = %b11
    108   call fastcc void @f3(i64 %a0, i8 zeroext 0, i8 zeroext 1, i32 1) #0
    109   br label %b14
    110 
    111 b13:                                              ; preds = %b11
    112   call fastcc void @f3(i64 %a0, i8 zeroext 0, i8 zeroext 0, i32 1) #0
    113   br label %b14
    114 
    115 b14:                                              ; preds = %b13, %b12, %b10, %b9, %b7, %b6, %b4
    116   ret void
    117 }
    118 
    119 ; Function Attrs: optsize
    120 declare zeroext i8 @f2(i64, i32, i32, i32, i8 zeroext, %11*) #0
    121 
    122 ; Function Attrs: nounwind optsize ssp
    123 declare hidden fastcc void @f3(i64, i8 zeroext, i8 zeroext, i32) #1
    124 
    125 attributes #0 = { optsize }
    126 attributes #1 = { nounwind optsize ssp }
    127 attributes #2 = { nounwind optsize }
    128