110 lines
3.8 KiB
LLVM
110 lines
3.8 KiB
LLVM
; RUN: llc -mtriple=x86_64-apple-macosx -mattr=+sse2 -verify-machineinstrs < %s | FileCheck %s
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; After tail duplication, two copies in an early exit BB can be cancelled out.
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; rdar://10640363
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define i32 @t1(i32 %a, i32 %b) nounwind {
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entry:
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; CHECK-LABEL: t1:
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; CHECK: je [[LABEL:.*BB.*]]
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%cmp1 = icmp eq i32 %b, 0
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br i1 %cmp1, label %while.end, label %while.body
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; CHECK: [[LABEL]]:
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; CHECK-NOT: mov
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; CHECK: ret
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while.body: ; preds = %entry, %while.body
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%a.addr.03 = phi i32 [ %b.addr.02, %while.body ], [ %a, %entry ]
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%b.addr.02 = phi i32 [ %rem, %while.body ], [ %b, %entry ]
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%rem = srem i32 %a.addr.03, %b.addr.02
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%cmp = icmp eq i32 %rem, 0
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br i1 %cmp, label %while.end, label %while.body
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while.end: ; preds = %while.body, %entry
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%a.addr.0.lcssa = phi i32 [ %a, %entry ], [ %b.addr.02, %while.body ]
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ret i32 %a.addr.0.lcssa
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}
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; Two movdqa (from phi-elimination) in the entry BB cancels out.
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; rdar://10428165
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define <8 x i16> @t2(<8 x i16> %T0, <8 x i16> %T1) nounwind readnone {
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entry:
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; CHECK-LABEL: t2:
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; CHECK-NOT: movdqa
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%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 >
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ret <8 x i16> %tmp8
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}
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define i32 @t3(i64 %a, i64 %b) nounwind {
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entry:
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; CHECK-LABEL: t3:
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; CHECK: je [[LABEL:.*BB.*]]
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%cmp1 = icmp eq i64 %b, 0
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br i1 %cmp1, label %while.end, label %while.body
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; CHECK: [[LABEL]]:
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; CHECK-NOT: mov
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; CHECK: ret
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while.body: ; preds = %entry, %while.body
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%a.addr.03 = phi i64 [ %b.addr.02, %while.body ], [ %a, %entry ]
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%b.addr.02 = phi i64 [ %rem, %while.body ], [ %b, %entry ]
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%rem = srem i64 %a.addr.03, %b.addr.02
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%cmp = icmp eq i64 %rem, 0
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br i1 %cmp, label %while.end, label %while.body
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while.end: ; preds = %while.body, %entry
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%a.addr.0.lcssa = phi i64 [ %a, %entry ], [ %b.addr.02, %while.body ]
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%t = trunc i64 %a.addr.0.lcssa to i32
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ret i32 %t
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}
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; Check that copy propagation does not kill thing like:
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; dst = copy src <-- do not kill that.
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; ... = op1 dst<undef>
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; ... = op2 dst <-- this is used here.
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;
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; CHECK-LABEL: foo:
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; CHECK: psllw $7,
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; CHECK: psllw $7, [[SRC1:%xmm[0-9]+]]
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; CHECK-NEXT: pand {{.*}}(%rip), [[SRC1]]
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; CHECK-NEXT: pcmpgtb [[SRC1]], [[SRC2:%xmm[0-9]+]]
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; CHECK-NEXT: pand %xmm{{[0-9]+}}, [[SRC2]]
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; CHECK-NEXT: movdqa [[SRC2]], [[CPY1:%xmm[0-9]+]]
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; CHECK-NEXT: punpcklbw %xmm{{[0-9]+}}, [[CPY1]]
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; Check that CPY1 is not redefined.
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; CHECK-NOT: , [[CPY1]]
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; CHECK: punpckhwd %xmm{{[0-9]+}}, [[CPY1]]
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; CHECK-NEXT: pslld $31, [[CPY1]]
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; CHECK-NEXT: psrad $31, [[CPY1]]
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; CHECK: punpckhbw %xmm{{[0-9]+}}, [[CPY2:%xmm[0-9]+]]
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; Check that CPY2 is not redefined.
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; CHECK-NOT: , [[CPY2]]
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; CHECK: punpckhwd %xmm{{[0-9]+}}, [[CPY2]]
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; CHECK-NEXT: pslld $31, [[CPY2]]
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; CHECK-NEXT: psrad $31, [[CPY2]]
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define <16 x float> @foo(<16 x float> %x) {
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bb:
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%v3 = icmp slt <16 x i32> undef, zeroinitializer
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%v14 = zext <16 x i1> %v3 to <16 x i32>
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%v16 = fcmp olt <16 x float> %x, zeroinitializer
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%v17 = sext <16 x i1> %v16 to <16 x i32>
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%v18 = zext <16 x i1> %v16 to <16 x i32>
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%v19 = xor <16 x i32> %v14, %v18
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%v20 = or <16 x i32> %v17, undef
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%v21 = fptosi <16 x float> %x to <16 x i32>
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%v22 = sitofp <16 x i32> %v21 to <16 x float>
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%v69 = fcmp ogt <16 x float> %v22, zeroinitializer
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%v75 = and <16 x i1> %v69, %v3
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%v77 = bitcast <16 x float> %v22 to <16 x i32>
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%v79 = sext <16 x i1> %v75 to <16 x i32>
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%v80 = and <16 x i32> undef, %v79
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%v81 = xor <16 x i32> %v77, %v80
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%v82 = and <16 x i32> undef, %v81
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%v83 = xor <16 x i32> %v19, %v82
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%v84 = and <16 x i32> %v83, %v20
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%v85 = xor <16 x i32> %v19, %v84
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%v86 = bitcast <16 x i32> %v85 to <16 x float>
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ret <16 x float> %v86
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}
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