test/Transforms/DeadStoreElimination/crash.ll

; RUN: opt < %s -passes=dse -S

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin10.0"

@g80 = external global i8                         ; <ptr> [#uses=3]

declare signext i8 @foo(i8 signext, i8 signext) nounwind readnone ssp

declare i32 @func68(i32) nounwind readonly ssp

; PR4815
define void @test1(i32 %int32p54) noreturn nounwind ssp {
entry:
  br label %bb

bb:                                               ; preds = %bb, %entry
  %storemerge = phi i8 [ %2, %bb ], [ 1, %entry ] ; <i8> [#uses=1]
  store i8 %storemerge, ptr @g80
  %0 = tail call i32 @func68(i32 1) nounwind ssp  ; <i32> [#uses=1]
  %1 = trunc i32 %0 to i8                         ; <i8> [#uses=1]
  store i8 %1, ptr @g80, align 1
  store i8 undef, ptr @g80, align 1
  %2 = tail call signext i8 @foo(i8 signext undef, i8 signext 1) nounwind ; <i8> [#uses=1]
  br label %bb
}

define fastcc i32 @test2() nounwind ssp {
bb14:                                             ; preds = %bb4
  %0 = getelementptr inbounds ptr, ptr undef, i64 undef  ; <ptr> [#uses=1]
  %1 = getelementptr inbounds i16, ptr %0, i64 undef  ; <ptr> [#uses=1]
  %2 = getelementptr inbounds i8, ptr %1, i64 undef   ; <ptr> [#uses=1]
  %3 = getelementptr inbounds i16, ptr %0, i64 undef  ; <ptr> [#uses=1]
  store i16 undef, ptr %3, align 2
  %4 = getelementptr inbounds i8, ptr %2, i64 undef   ; <ptr> [#uses=1]
  call void @llvm.memcpy.p0.p0.i64(ptr %4, ptr undef, i64 undef, i1 false)
  unreachable
}

declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind


; rdar://7635088
define i32 @test3() {
entry:
  ret i32 0
  
dead:
  %P2 = getelementptr i32, ptr %P2, i32 52
  %Q2 = getelementptr i32, ptr %Q2, i32 52
  store i32 4, ptr %P2
  store i32 4, ptr %Q2
  br label %dead
}


; PR3141
%struct.ada__tags__dispatch_table = type { [1 x i32] }
%struct.f393a00_1__object = type { ptr, i8 }
%struct.f393a00_2__windmill = type { %struct.f393a00_1__object, i16 }

define void @test4(ptr %a, ptr %b) {
entry:
	%t = alloca %struct.f393a00_2__windmill		; <ptr> [#uses=1]
	%0 = getelementptr %struct.f393a00_2__windmill, ptr %t, i32 0, i32 0, i32 0		; <ptr> [#uses=1]
	%1 = load ptr, ptr null, align 4		; <ptr> [#uses=1]
	%2 = load ptr, ptr %0, align 8		; <ptr> [#uses=1]
	store ptr %2, ptr null, align 4
	store ptr %1, ptr null, align 4
	ret void
}