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      1 ; RUN: opt < %s -instcombine -S | FileCheck %s
      2 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
      3 target triple = "x86_64-apple-macosx10.9.0"
      4 
      5 %struct._my_struct = type <{ [12 x i8], [4 x i8] }>
      6 
      7 @initval = common global %struct._my_struct zeroinitializer, align 1
      8 
      9 ; InstCombine will try to change the %struct._my_struct alloca into an
     10 ; allocation of an i96 because of the bitcast to create %2. That's not valid,
     11 ; as the other 32 bits of the structure still feed into the return value
     12 define { i64, i64 } @function(i32 %x, i32 %y, i32 %z) nounwind {
     13 ; CHECK-LABEL: @function(
     14 ; CHECK-NEXT: entry:
     15 ; CHECK-NEXT: %retval = alloca %struct._my_struct, align 8
     16 ; CHECK-NOT: bitcast i96* %retval to %struct._my_struct*
     17 entry:
     18   %retval = alloca %struct._my_struct, align 8
     19   %k.sroa.0.0.copyload = load i96* bitcast (%struct._my_struct* @initval to i96*), align 1
     20   %k.sroa.1.12.copyload = load i32* bitcast ([4 x i8]* getelementptr inbounds (%struct._my_struct* @initval, i64 0, i32 1) to i32*), align 1
     21   %0 = zext i32 %x to i96
     22   %bf.value = shl nuw nsw i96 %0, 6
     23   %bf.clear = and i96 %k.sroa.0.0.copyload, -288230376151711744
     24   %1 = zext i32 %y to i96
     25   %bf.value2 = shl nuw nsw i96 %1, 32
     26   %bf.shl3 = and i96 %bf.value2, 288230371856744448
     27   %bf.value.masked = and i96 %bf.value, 4294967232
     28   %2 = zext i32 %z to i96
     29   %bf.value8 = and i96 %2, 63
     30   %bf.clear4 = or i96 %bf.shl3, %bf.value.masked
     31   %bf.set5 = or i96 %bf.clear4, %bf.value8
     32   %bf.set10 = or i96 %bf.set5, %bf.clear
     33   %retval.0.cast7 = bitcast %struct._my_struct* %retval to i96*
     34   store i96 %bf.set10, i96* %retval.0.cast7, align 8
     35   %retval.12.idx8 = getelementptr inbounds %struct._my_struct* %retval, i64 0, i32 1
     36   %retval.12.cast9 = bitcast [4 x i8]* %retval.12.idx8 to i32*
     37   store i32 %k.sroa.1.12.copyload, i32* %retval.12.cast9, align 4
     38   %trunc = trunc i96 %bf.set10 to i64
     39   %.fca.0.insert = insertvalue { i64, i64 } undef, i64 %trunc, 0
     40   %retval.8.idx12 = getelementptr inbounds %struct._my_struct* %retval, i64 0, i32 0, i64 8
     41   %retval.8.cast13 = bitcast i8* %retval.8.idx12 to i64*
     42   %retval.8.load14 = load i64* %retval.8.cast13, align 8
     43   %.fca.1.insert = insertvalue { i64, i64 } %.fca.0.insert, i64 %retval.8.load14, 1
     44   ret { i64, i64 } %.fca.1.insert
     45 }
     46