1; RUN: llc < %s -mtriple=thumbv7-apple-darwin | FileCheck %s 2; XFAIL: * 3 4define i32 @t1(i32 %a, i32 %b, i32 %c, i32 %d) nounwind { 5; CHECK-LABEL: t1: 6; CHECK: it ne 7; CHECK: cmpne 8 switch i32 %c, label %cond_next [ 9 i32 1, label %cond_true 10 i32 7, label %cond_true 11 ] 12 13cond_true: 14 %tmp12 = add i32 %a, 1 15 %tmp1518 = add i32 %tmp12, %b 16 ret i32 %tmp1518 17 18cond_next: 19 %tmp15 = add i32 %b, %a 20 ret i32 %tmp15 21} 22 23; FIXME: Check for # of unconditional branch after adding branch folding post ifcvt. 24define i32 @t2(i32 %a, i32 %b) nounwind { 25entry: 26; CHECK-LABEL: t2: 27; CHECK: ite gt 28; CHECK: subgt 29; CHECK: suble 30 %tmp1434 = icmp eq i32 %a, %b ; <i1> [#uses=1] 31 br i1 %tmp1434, label %bb17, label %bb.outer 32 33bb.outer: ; preds = %cond_false, %entry 34 %b_addr.021.0.ph = phi i32 [ %b, %entry ], [ %tmp10, %cond_false ] ; <i32> [#uses=5] 35 %a_addr.026.0.ph = phi i32 [ %a, %entry ], [ %a_addr.026.0, %cond_false ] ; <i32> [#uses=1] 36 br label %bb 37 38bb: ; preds = %cond_true, %bb.outer 39 %indvar = phi i32 [ 0, %bb.outer ], [ %indvar.next, %cond_true ] ; <i32> [#uses=2] 40 %tmp. = sub i32 0, %b_addr.021.0.ph ; <i32> [#uses=1] 41 %tmp.40 = mul i32 %indvar, %tmp. ; <i32> [#uses=1] 42 %a_addr.026.0 = add i32 %tmp.40, %a_addr.026.0.ph ; <i32> [#uses=6] 43 %tmp3 = icmp sgt i32 %a_addr.026.0, %b_addr.021.0.ph ; <i1> [#uses=1] 44 br i1 %tmp3, label %cond_true, label %cond_false 45 46cond_true: ; preds = %bb 47 %tmp7 = sub i32 %a_addr.026.0, %b_addr.021.0.ph ; <i32> [#uses=2] 48 %tmp1437 = icmp eq i32 %tmp7, %b_addr.021.0.ph ; <i1> [#uses=1] 49 %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1] 50 br i1 %tmp1437, label %bb17, label %bb 51 52cond_false: ; preds = %bb 53 %tmp10 = sub i32 %b_addr.021.0.ph, %a_addr.026.0 ; <i32> [#uses=2] 54 %tmp14 = icmp eq i32 %a_addr.026.0, %tmp10 ; <i1> [#uses=1] 55 br i1 %tmp14, label %bb17, label %bb.outer 56 57bb17: ; preds = %cond_false, %cond_true, %entry 58 %a_addr.026.1 = phi i32 [ %a, %entry ], [ %tmp7, %cond_true ], [ %a_addr.026.0, %cond_false ] ; <i32> [#uses=1] 59 ret i32 %a_addr.026.1 60} 61 62@x = external global i32* ; <i32**> [#uses=1] 63 64define void @foo(i32 %a) nounwind { 65entry: 66 %tmp = load i32*, i32** @x ; <i32*> [#uses=1] 67 store i32 %a, i32* %tmp 68 ret void 69} 70 71; Tail call prevents use of ifcvt in this one. Seems like a win though. 72define void @t3(i32 %a, i32 %b) nounwind { 73entry: 74; CHECK-LABEL: t3: 75; CHECK-NOT: it lt 76; CHECK-NOT: poplt 77; CHECK: b.w _foo @ TAILCALL 78 %tmp1 = icmp sgt i32 %a, 10 ; <i1> [#uses=1] 79 br i1 %tmp1, label %cond_true, label %UnifiedReturnBlock 80 81cond_true: ; preds = %entry 82 tail call void @foo( i32 %b ) 83 ret void 84 85UnifiedReturnBlock: ; preds = %entry 86 ret void 87} 88