1 ; RUN: llc -mtriple=x86_64-apple-macosx -mcpu=nocona -verify-machineinstrs < %s | FileCheck %s 2 3 ; After tail duplication, two copies in an early exit BB can be cancelled out. 4 ; rdar://10640363 5 define i32 @t1(i32 %a, i32 %b) nounwind { 6 entry: 7 ; CHECK-LABEL: t1: 8 ; CHECK: je [[LABEL:.*BB.*]] 9 %cmp1 = icmp eq i32 %b, 0 10 br i1 %cmp1, label %while.end, label %while.body 11 12 ; CHECK: [[LABEL]]: 13 ; CHECK-NOT: mov 14 ; CHECK: ret 15 16 while.body: ; preds = %entry, %while.body 17 %a.addr.03 = phi i32 [ %b.addr.02, %while.body ], [ %a, %entry ] 18 %b.addr.02 = phi i32 [ %rem, %while.body ], [ %b, %entry ] 19 %rem = srem i32 %a.addr.03, %b.addr.02 20 %cmp = icmp eq i32 %rem, 0 21 br i1 %cmp, label %while.end, label %while.body 22 23 while.end: ; preds = %while.body, %entry 24 %a.addr.0.lcssa = phi i32 [ %a, %entry ], [ %b.addr.02, %while.body ] 25 ret i32 %a.addr.0.lcssa 26 } 27 28 ; Two movdqa (from phi-elimination) in the entry BB cancels out. 29 ; rdar://10428165 30 define <8 x i16> @t2(<8 x i16> %T0, <8 x i16> %T1) nounwind readnone { 31 entry: 32 ; CHECK-LABEL: t2: 33 ; CHECK-NOT: movdqa 34 %tmp8 = shufflevector <8 x i16> %T0, <8 x i16> %T1, <8 x i32> < i32 undef, i32 undef, i32 7, i32 2, i32 8, i32 undef, i32 undef , i32 undef > 35 ret <8 x i16> %tmp8 36 } 37 38 define i32 @t3(i64 %a, i64 %b) nounwind { 39 entry: 40 ; CHECK-LABEL: t3: 41 ; CHECK: je [[LABEL:.*BB.*]] 42 %cmp1 = icmp eq i64 %b, 0 43 br i1 %cmp1, label %while.end, label %while.body 44 45 ; CHECK: [[LABEL]]: 46 ; CHECK-NOT: mov 47 ; CHECK: ret 48 49 while.body: ; preds = %entry, %while.body 50 %a.addr.03 = phi i64 [ %b.addr.02, %while.body ], [ %a, %entry ] 51 %b.addr.02 = phi i64 [ %rem, %while.body ], [ %b, %entry ] 52 %rem = srem i64 %a.addr.03, %b.addr.02 53 %cmp = icmp eq i64 %rem, 0 54 br i1 %cmp, label %while.end, label %while.body 55 56 while.end: ; preds = %while.body, %entry 57 %a.addr.0.lcssa = phi i64 [ %a, %entry ], [ %b.addr.02, %while.body ] 58 %t = trunc i64 %a.addr.0.lcssa to i32 59 ret i32 %t 60 } 61 62 ; Check that copy propagation does not kill thing like: 63 ; dst = copy src <-- do not kill that. 64 ; ... = op1 dst<undef> 65 ; ... = op2 dst <-- this is used here. 66 ; 67 ; CHECK-LABEL: foo: 68 ; CHECK: psllw $7, 69 ; CHECK: psllw $7, [[SRC1:%xmm[0-9]+]] 70 ; CHECK-NEXT: pand {{.*}}(%rip), [[SRC1]] 71 ; CHECK-NEXT: pcmpgtb [[SRC1]], [[SRC2:%xmm[0-9]+]] 72 ; CHECK-NEXT: pand %xmm{{[0-9]+}}, [[SRC2]] 73 ; CHECK-NEXT: movdqa [[SRC2]], [[CPY1:%xmm[0-9]+]] 74 ; CHECK-NEXT: punpcklbw %xmm{{[0-9]+}}, [[CPY1]] 75 ; Check that CPY1 is not redefined. 76 ; CHECK-NOT: , [[CPY1]] 77 ; CHECK: punpckhwd %xmm{{[0-9]+}}, [[CPY1]] 78 ; CHECK-NEXT: pslld $31, [[CPY1]] 79 ; CHECK-NEXT: psrad $31, [[CPY1]] 80 ; CHECK: punpckhbw %xmm{{[0-9]+}}, [[CPY2:%xmm[0-9]+]] 81 ; Check that CPY2 is not redefined. 82 ; CHECK-NOT: , [[CPY2]] 83 ; CHECK: punpckhwd %xmm{{[0-9]+}}, [[CPY2]] 84 ; CHECK-NEXT: pslld $31, [[CPY2]] 85 ; CHECK-NEXT: psrad $31, [[CPY2]] 86 define <16 x float> @foo(<16 x float> %x) { 87 bb: 88 %v3 = icmp slt <16 x i32> undef, zeroinitializer 89 %v14 = zext <16 x i1> %v3 to <16 x i32> 90 %v16 = fcmp olt <16 x float> %x, zeroinitializer 91 %v17 = sext <16 x i1> %v16 to <16 x i32> 92 %v18 = zext <16 x i1> %v16 to <16 x i32> 93 %v19 = xor <16 x i32> %v14, %v18 94 %v20 = or <16 x i32> %v17, undef 95 %v21 = fptosi <16 x float> %x to <16 x i32> 96 %v22 = sitofp <16 x i32> %v21 to <16 x float> 97 %v69 = fcmp ogt <16 x float> %v22, zeroinitializer 98 %v75 = and <16 x i1> %v69, %v3 99 %v77 = bitcast <16 x float> %v22 to <16 x i32> 100 %v79 = sext <16 x i1> %v75 to <16 x i32> 101 %v80 = and <16 x i32> undef, %v79 102 %v81 = xor <16 x i32> %v77, %v80 103 %v82 = and <16 x i32> undef, %v81 104 %v83 = xor <16 x i32> %v19, %v82 105 %v84 = and <16 x i32> %v83, %v20 106 %v85 = xor <16 x i32> %v19, %v84 107 %v86 = bitcast <16 x i32> %v85 to <16 x float> 108 ret <16 x float> %v86 109 } 110
