1 ; RUN: llc %s -o - -verify-machineinstrs | FileCheck %s 2 3 target datalayout = "e-m:o-p:32:32-f64:32:64-v64:32:64-v128:32:128-a:0:32-n32-S32" 4 target triple = "thumbv7-unknown-unknown" 5 6 %struct.ref_s = type { %union.v, i16, i16 } 7 %union.v = type { i32 } 8 %struct.gs_color_s = type { i16, i16, i16, i16, i8, i8 } 9 10 ; In this case, the if converter was cloning the return instruction so that we had 11 ; r2<def> = ... 12 ; return [pred] r2<dead,def> 13 ; ldr <r2, kill> 14 ; return 15 ; The problem here was that the dead def on the first return was making the machine verifier 16 ; think that the load read from an undefined register. We need to remove the dead flag from 17 ; the return, and also add an implicit use of the prior value of r2. 18 19 ; CHECK: ldrh 20 21 ; Function Attrs: minsize nounwind optsize ssp 22 define i32 @test(%struct.ref_s* %pref1, %struct.ref_s* %pref2, %struct.gs_color_s** %tmp152) #0 { 23 bb: 24 %nref = alloca %struct.ref_s, align 4 25 %tmp46 = call %struct.ref_s* @name_string_ref(%struct.ref_s* %pref1, %struct.ref_s* %nref) #2 26 %tmp153 = load %struct.gs_color_s*, %struct.gs_color_s** %tmp152, align 4 27 %tmp154 = bitcast %struct.ref_s* %pref2 to %struct.gs_color_s** 28 %tmp155 = load %struct.gs_color_s*, %struct.gs_color_s** %tmp154, align 4 29 %tmp162 = getelementptr inbounds %struct.gs_color_s, %struct.gs_color_s* %tmp153, i32 0, i32 1 30 %tmp163 = load i16, i16* %tmp162, align 2 31 %tmp164 = getelementptr inbounds %struct.gs_color_s, %struct.gs_color_s* %tmp155, i32 0, i32 1 32 %tmp165 = load i16, i16* %tmp164, align 2 33 %tmp166 = icmp eq i16 %tmp163, %tmp165 34 br i1 %tmp166, label %bb167, label %bb173 35 36 bb167: ; preds = %bb 37 %tmp168 = getelementptr inbounds %struct.gs_color_s, %struct.gs_color_s* %tmp153, i32 0, i32 2 38 %tmp169 = load i16, i16* %tmp168, align 2 39 %tmp170 = getelementptr inbounds %struct.gs_color_s, %struct.gs_color_s* %tmp155, i32 0, i32 2 40 %tmp171 = load i16, i16* %tmp170, align 2 41 %tmp172 = icmp eq i16 %tmp169, %tmp171 42 br label %bb173 43 44 bb173: ; preds = %bb167, %bb 45 %tmp174 = phi i1 [ false, %bb ], [ %tmp172, %bb167 ] 46 %tmp175 = zext i1 %tmp174 to i32 47 ret i32 %tmp175 48 } 49 50 ; Function Attrs: minsize optsize 51 declare %struct.ref_s* @name_string_ref(%struct.ref_s*, %struct.ref_s*) #1 52 53 attributes #0 = { minsize nounwind optsize } 54 attributes #1 = { minsize optsize } 55 attributes #2 = { minsize nounwind optsize } 56
