1 ; RUN: llc < %s -mtriple=armv7-apple-ios | FileCheck %s 2 ;rdar://8003725 3 4 @G1 = external global i32 5 @G2 = external global i32 6 7 define i32 @f1(i32 %cond1, i32 %x1, i32 %x2, i32 %x3) { 8 entry: 9 ; CHECK-LABEL: f1: 10 ; CHECK: cmp 11 ; CHECK: moveq 12 ; CHECK-NOT: cmp 13 ; CHECK: mov{{eq|ne}} 14 %tmp1 = icmp eq i32 %cond1, 0 15 %tmp2 = select i1 %tmp1, i32 %x1, i32 %x2 16 %tmp3 = select i1 %tmp1, i32 %x2, i32 %x3 17 %tmp4 = add i32 %tmp2, %tmp3 18 ret i32 %tmp4 19 } 20 21 @foo = external global i32 22 @bar = external global [250 x i8], align 1 23 24 ; CSE of cmp across BB boundary 25 ; rdar://10660865 26 define void @f2() nounwind ssp { 27 entry: 28 ; CHECK-LABEL: f2: 29 ; CHECK: cmp 30 ; CHECK: poplt 31 ; CHECK-NOT: cmp 32 ; CHECK: movle 33 %0 = load i32* @foo, align 4 34 %cmp28 = icmp sgt i32 %0, 0 35 br i1 %cmp28, label %for.body.lr.ph, label %for.cond1.preheader 36 37 for.body.lr.ph: ; preds = %entry 38 %1 = icmp sgt i32 %0, 1 39 %smax = select i1 %1, i32 %0, i32 1 40 call void @llvm.memset.p0i8.i32(i8* getelementptr inbounds ([250 x i8]* @bar, i32 0, i32 0), i8 0, i32 %smax, i32 1, i1 false) 41 unreachable 42 43 for.cond1.preheader: ; preds = %entry 44 ret void 45 } 46 47 declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind 48 49 ; rdar://12462006 50 define i8* @f3(i8* %base, i32* nocapture %offset, i32 %size) nounwind { 51 entry: 52 ; CHECK-LABEL: f3: 53 ; CHECK-NOT: sub 54 ; CHECK: cmp 55 ; CHECK: blt 56 %0 = load i32* %offset, align 4 57 %cmp = icmp slt i32 %0, %size 58 %s = sub nsw i32 %0, %size 59 %size2 = sub nsw i32 %size, 0 60 br i1 %cmp, label %return, label %if.end 61 62 if.end: 63 ; We are checking cse between %sub here and %s in entry block. 64 %sub = sub nsw i32 %0, %size2 65 %s2 = sub nsw i32 %s, %size 66 %s3 = sub nsw i32 %sub, %s2 67 ; CHECK: sub [[R1:r[0-9]+]], [[R2:r[0-9]+]], r2 68 ; CHECK: sub [[R3:r[0-9]+]], [[R1]], r2 69 ; CHECK: sub [[R4:r[0-9]+]], [[R1]], [[R3]] 70 ; CHECK-NOT: sub 71 ; CHECK: str 72 store i32 %s3, i32* %offset, align 4 73 %add.ptr = getelementptr inbounds i8* %base, i32 %sub 74 br label %return 75 76 return: 77 %retval.0 = phi i8* [ %add.ptr, %if.end ], [ null, %entry ] 78 ret i8* %retval.0 79 } 80
