| ; RUN: llc -mtriple=x86_64-apple-macosx -mcpu=nocona -verify-machineinstrs < %s | FileCheck %s |
| |
| ; After tail duplication, two copies in an early exit BB can be cancelled out. |
| ; rdar://10640363 |
| define i32 @t1(i32 %a, i32 %b) nounwind { |
| entry: |
| ; CHECK-LABEL: t1: |
| ; CHECK: je [[LABEL:.*BB.*]] |
| %cmp1 = icmp eq i32 %b, 0 |
| br i1 %cmp1, label %while.end, label %while.body |
| |
| ; CHECK: [[LABEL]]: |
| ; CHECK-NOT: mov |
| ; CHECK: ret |
| |
| while.body: ; preds = %entry, %while.body |
| %a.addr.03 = phi i32 [ %b.addr.02, %while.body ], [ %a, %entry ] |
| %b.addr.02 = phi i32 [ %rem, %while.body ], [ %b, %entry ] |
| %rem = srem i32 %a.addr.03, %b.addr.02 |
| %cmp = icmp eq i32 %rem, 0 |
| br i1 %cmp, label %while.end, label %while.body |
| |
| while.end: ; preds = %while.body, %entry |
| %a.addr.0.lcssa = phi i32 [ %a, %entry ], [ %b.addr.02, %while.body ] |
| ret i32 %a.addr.0.lcssa |
| } |
| |
| ; Two movdqa (from phi-elimination) in the entry BB cancels out. |
| ; rdar://10428165 |
| define <8 x i16> @t2(<8 x i16> %T0, <8 x i16> %T1) nounwind readnone { |
| entry: |
| ; CHECK-LABEL: t2: |
| ; CHECK-NOT: movdqa |
| %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 > |
| ret <8 x i16> %tmp8 |
| } |
| |
| define i32 @t3(i64 %a, i64 %b) nounwind { |
| entry: |
| ; CHECK-LABEL: t3: |
| ; CHECK: je [[LABEL:.*BB.*]] |
| %cmp1 = icmp eq i64 %b, 0 |
| br i1 %cmp1, label %while.end, label %while.body |
| |
| ; CHECK: [[LABEL]]: |
| ; CHECK-NOT: mov |
| ; CHECK: ret |
| |
| while.body: ; preds = %entry, %while.body |
| %a.addr.03 = phi i64 [ %b.addr.02, %while.body ], [ %a, %entry ] |
| %b.addr.02 = phi i64 [ %rem, %while.body ], [ %b, %entry ] |
| %rem = srem i64 %a.addr.03, %b.addr.02 |
| %cmp = icmp eq i64 %rem, 0 |
| br i1 %cmp, label %while.end, label %while.body |
| |
| while.end: ; preds = %while.body, %entry |
| %a.addr.0.lcssa = phi i64 [ %a, %entry ], [ %b.addr.02, %while.body ] |
| %t = trunc i64 %a.addr.0.lcssa to i32 |
| ret i32 %t |
| } |
| |
| ; Check that copy propagation does not kill thing like: |
| ; dst = copy src <-- do not kill that. |
| ; ... = op1 dst<undef> |
| ; ... = op2 dst <-- this is used here. |
| ; |
| ; CHECK-LABEL: foo: |
| ; CHECK: psllw $7, |
| ; CHECK: psllw $7, [[SRC1:%xmm[0-9]+]] |
| ; CHECK-NEXT: pand {{.*}}(%rip), [[SRC1]] |
| ; CHECK-NEXT: pcmpgtb [[SRC1]], [[SRC2:%xmm[0-9]+]] |
| ; CHECK-NEXT: pand %xmm{{[0-9]+}}, [[SRC2]] |
| ; CHECK-NEXT: movdqa [[SRC2]], [[CPY1:%xmm[0-9]+]] |
| ; CHECK-NEXT: punpcklbw %xmm{{[0-9]+}}, [[CPY1]] |
| ; Check that CPY1 is not redefined. |
| ; CHECK-NOT: , [[CPY1]] |
| ; CHECK: punpckhwd %xmm{{[0-9]+}}, [[CPY1]] |
| ; CHECK-NEXT: pslld $31, [[CPY1]] |
| ; CHECK-NEXT: psrad $31, [[CPY1]] |
| ; CHECK: punpckhbw %xmm{{[0-9]+}}, [[CPY2:%xmm[0-9]+]] |
| ; Check that CPY2 is not redefined. |
| ; CHECK-NOT: , [[CPY2]] |
| ; CHECK: punpckhwd %xmm{{[0-9]+}}, [[CPY2]] |
| ; CHECK-NEXT: pslld $31, [[CPY2]] |
| ; CHECK-NEXT: psrad $31, [[CPY2]] |
| define <16 x float> @foo(<16 x float> %x) { |
| bb: |
| %v3 = icmp slt <16 x i32> undef, zeroinitializer |
| %v14 = zext <16 x i1> %v3 to <16 x i32> |
| %v16 = fcmp olt <16 x float> %x, zeroinitializer |
| %v17 = sext <16 x i1> %v16 to <16 x i32> |
| %v18 = zext <16 x i1> %v16 to <16 x i32> |
| %v19 = xor <16 x i32> %v14, %v18 |
| %v20 = or <16 x i32> %v17, undef |
| %v21 = fptosi <16 x float> %x to <16 x i32> |
| %v22 = sitofp <16 x i32> %v21 to <16 x float> |
| %v69 = fcmp ogt <16 x float> %v22, zeroinitializer |
| %v75 = and <16 x i1> %v69, %v3 |
| %v77 = bitcast <16 x float> %v22 to <16 x i32> |
| %v79 = sext <16 x i1> %v75 to <16 x i32> |
| %v80 = and <16 x i32> undef, %v79 |
| %v81 = xor <16 x i32> %v77, %v80 |
| %v82 = and <16 x i32> undef, %v81 |
| %v83 = xor <16 x i32> %v19, %v82 |
| %v84 = and <16 x i32> %v83, %v20 |
| %v85 = xor <16 x i32> %v19, %v84 |
| %v86 = bitcast <16 x i32> %v85 to <16 x float> |
| ret <16 x float> %v86 |
| } |