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; RUN: llc < %s -mcpu=generic -march=x86 | FileCheck %s
%struct._obstack_chunk = type { i8*, %struct._obstack_chunk*, [4 x i8] }
%struct.obstack = type { i32, %struct._obstack_chunk*, i8*, i8*, i8*, i32, i32, %struct._obstack_chunk* (...)*, void (...)*, i8*, i8 }
@stmt_obstack = external global %struct.obstack ; <%struct.obstack*> [#uses=1]
; This should just not crash.
define void @test1() nounwind {
entry:
br i1 true, label %cond_true, label %cond_next
cond_true: ; preds = %entry
%new_size.0.i = select i1 false, i32 0, i32 0 ; <i32> [#uses=1]
%tmp.i = load i32* bitcast (i8* getelementptr (%struct.obstack* @stmt_obstack, i32 0, i32 10) to i32*) ; <i32> [#uses=1]
%tmp.i.upgrd.1 = trunc i32 %tmp.i to i8 ; <i8> [#uses=1]
%tmp21.i = and i8 %tmp.i.upgrd.1, 1 ; <i8> [#uses=1]
%tmp22.i = icmp eq i8 %tmp21.i, 0 ; <i1> [#uses=1]
br i1 %tmp22.i, label %cond_false30.i, label %cond_true23.i
cond_true23.i: ; preds = %cond_true
ret void
cond_false30.i: ; preds = %cond_true
%tmp35.i = tail call %struct._obstack_chunk* null( i32 %new_size.0.i ) ; <%struct._obstack_chunk*> [#uses=0]
ret void
cond_next: ; preds = %entry
ret void
}
define i32 @test2(i16* %P, i16* %Q) nounwind {
%A = load i16* %P, align 4 ; <i16> [#uses=11]
%C = zext i16 %A to i32 ; <i32> [#uses=1]
%D = and i32 %C, 255 ; <i32> [#uses=1]
br label %L
L:
store i16 %A, i16* %Q
ret i32 %D
; CHECK-LABEL: test2:
; CHECK: movl 4(%esp), %eax
; CHECK-NEXT: movzwl (%eax), %e{{..}}
}
; rdar://10554090
; xor in exit block will be CSE'ed and load will be folded to xor in entry.
define i1 @test3(i32* %P, i32* %Q) nounwind {
; CHECK-LABEL: test3:
; CHECK: movl 8(%esp), %e
; CHECK: movl 4(%esp), %e
; CHECK: xorl (%e
; CHECK: j
entry:
%0 = load i32* %P, align 4
%1 = load i32* %Q, align 4
%2 = xor i32 %0, %1
%3 = and i32 %2, 89947
%4 = icmp eq i32 %3, 0
br i1 %4, label %exit, label %land.end
exit:
%shr.i.i19 = xor i32 %1, %0
%5 = and i32 %shr.i.i19, 3456789123
%6 = icmp eq i32 %5, 0
br label %land.end
land.end:
%7 = phi i1 [ %6, %exit ], [ false, %entry ]
ret i1 %7
}
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