1; RUN: llc < %s -mcpu=generic -march=x86 | FileCheck %s 2 %struct._obstack_chunk = type { i8*, %struct._obstack_chunk*, [4 x i8] } 3 %struct.obstack = type { i32, %struct._obstack_chunk*, i8*, i8*, i8*, i32, i32, %struct._obstack_chunk* (...)*, void (...)*, i8*, i8 } 4@stmt_obstack = external global %struct.obstack ; <%struct.obstack*> [#uses=1] 5 6; This should just not crash. 7define void @test1() nounwind { 8entry: 9 br i1 true, label %cond_true, label %cond_next 10 11cond_true: ; preds = %entry 12 %new_size.0.i = select i1 false, i32 0, i32 0 ; <i32> [#uses=1] 13 %tmp.i = load i32* bitcast (i8* getelementptr (%struct.obstack* @stmt_obstack, i32 0, i32 10) to i32*) ; <i32> [#uses=1] 14 %tmp.i.upgrd.1 = trunc i32 %tmp.i to i8 ; <i8> [#uses=1] 15 %tmp21.i = and i8 %tmp.i.upgrd.1, 1 ; <i8> [#uses=1] 16 %tmp22.i = icmp eq i8 %tmp21.i, 0 ; <i1> [#uses=1] 17 br i1 %tmp22.i, label %cond_false30.i, label %cond_true23.i 18 19cond_true23.i: ; preds = %cond_true 20 ret void 21 22cond_false30.i: ; preds = %cond_true 23 %tmp35.i = tail call %struct._obstack_chunk* null( i32 %new_size.0.i ) ; <%struct._obstack_chunk*> [#uses=0] 24 ret void 25 26cond_next: ; preds = %entry 27 ret void 28} 29 30 31 32define i32 @test2(i16* %P, i16* %Q) nounwind { 33 %A = load i16* %P, align 4 ; <i16> [#uses=11] 34 %C = zext i16 %A to i32 ; <i32> [#uses=1] 35 %D = and i32 %C, 255 ; <i32> [#uses=1] 36 br label %L 37L: 38 39 store i16 %A, i16* %Q 40 ret i32 %D 41 42; CHECK: test2: 43; CHECK: movl 4(%esp), %eax 44; CHECK-NEXT: movzwl (%eax), %ecx 45 46} 47 48