1 ; RUN: llc < %s -mtriple=thumbv7-apple-ios5.0.0 | FileCheck %s 2 ; rdar://10464621 3 4 ; DAG combine increases loads from packed types. ARM load / store optimizer then 5 ; combined them into a ldm which causes runtime exception. 6 7 %struct.InformationBlock = type <{ i32, %struct.FlagBits, %struct.FlagBits }> 8 %struct.FlagBits = type <{ [4 x i32] }> 9 10 @infoBlock = external global %struct.InformationBlock 11 12 define hidden void @foo() { 13 ; CHECK-LABEL: foo: 14 ; CHECK: ldr.w 15 ; CHECK: ldr.w 16 ; CHECK-NOT: ldm 17 entry: 18 %tmp13 = load i32* getelementptr inbounds (%struct.InformationBlock* @infoBlock, i32 0, i32 1, i32 0, i32 0), align 1 19 %tmp15 = load i32* getelementptr inbounds (%struct.InformationBlock* @infoBlock, i32 0, i32 1, i32 0, i32 1), align 1 20 %tmp17 = load i32* getelementptr inbounds (%struct.InformationBlock* @infoBlock, i32 0, i32 1, i32 0, i32 2), align 1 21 %tmp19 = load i32* getelementptr inbounds (%struct.InformationBlock* @infoBlock, i32 0, i32 1, i32 0, i32 3), align 1 22 %tmp = load i32* getelementptr inbounds (%struct.InformationBlock* @infoBlock, i32 0, i32 2, i32 0, i32 0), align 1 23 %tmp3 = load i32* getelementptr inbounds (%struct.InformationBlock* @infoBlock, i32 0, i32 2, i32 0, i32 1), align 1 24 %tmp4 = load i32* getelementptr inbounds (%struct.InformationBlock* @infoBlock, i32 0, i32 2, i32 0, i32 2), align 1 25 %tmp5 = load i32* getelementptr inbounds (%struct.InformationBlock* @infoBlock, i32 0, i32 2, i32 0, i32 3), align 1 26 %insert21 = insertvalue [4 x i32] undef, i32 %tmp13, 0 27 %insert23 = insertvalue [4 x i32] %insert21, i32 %tmp15, 1 28 %insert25 = insertvalue [4 x i32] %insert23, i32 %tmp17, 2 29 %insert27 = insertvalue [4 x i32] %insert25, i32 %tmp19, 3 30 %insert = insertvalue [4 x i32] undef, i32 %tmp, 0 31 %insert7 = insertvalue [4 x i32] %insert, i32 %tmp3, 1 32 %insert9 = insertvalue [4 x i32] %insert7, i32 %tmp4, 2 33 %insert11 = insertvalue [4 x i32] %insert9, i32 %tmp5, 3 34 tail call void @bar([4 x i32] %insert27, [4 x i32] %insert11) 35 ret void 36 } 37 38 declare void @bar([4 x i32], [4 x i32]) 39
