forked from OSchip/llvm-project
88 lines
3.2 KiB
LLVM
88 lines
3.2 KiB
LLVM
; RUN: llc < %s -mcpu=nehalem | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.7"
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; CHECK: f
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;
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; This function contains load / store / and operations that all can execute in
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; any domain. The only domain-specific operation is the %add = shl... operation
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; which is <4 x i32>.
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;
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; The paddd instruction can only influence the other operations through the loop
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; back-edge. Check that everything is still moved into the integer domain.
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define void @f(<4 x i32>* nocapture %p, i32 %n) nounwind uwtable ssp {
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entry:
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br label %while.body
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; Materialize a zeroinitializer and a constant-pool load in the integer domain.
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; The order is not important.
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; CHECK: pxor
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; CHECK: movdqa
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; The instructions in the loop must all be integer domain as well.
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; CHECK: while.body
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; CHECK: pand
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; CHECK: movdqa
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; CHECK: movdqa
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; Finally, the controlling integer-only instruction.
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; CHECK: paddd
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while.body:
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%p.addr.04 = phi <4 x i32>* [ %incdec.ptr, %while.body ], [ %p, %entry ]
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%n.addr.03 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
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%x.02 = phi <4 x i32> [ %add, %while.body ], [ zeroinitializer, %entry ]
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%dec = add nsw i32 %n.addr.03, -1
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%and = and <4 x i32> %x.02, <i32 127, i32 127, i32 127, i32 127>
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%incdec.ptr = getelementptr inbounds <4 x i32>* %p.addr.04, i64 1
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store <4 x i32> %and, <4 x i32>* %p.addr.04, align 16
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%0 = load <4 x i32>* %incdec.ptr, align 16
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%add = shl <4 x i32> %0, <i32 1, i32 1, i32 1, i32 1>
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%tobool = icmp eq i32 %dec, 0
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br i1 %tobool, label %while.end, label %while.body
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while.end:
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ret void
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}
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; CHECK: f2
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; CHECK: for.body
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;
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; This loop contains two cvtsi2ss instructions that update the same xmm
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; register. Verify that the execution dependency fix pass breaks those
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; dependencies by inserting xorps instructions.
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;
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; If the register allocator chooses different registers for the two cvtsi2ss
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; instructions, they are still dependent on themselves.
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; CHECK: xorps [[XMM1:%xmm[0-9]+]]
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; CHECK: , [[XMM1]]
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; CHECK: cvtsi2ssl %{{.*}}, [[XMM1]]
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; CHECK: xorps [[XMM2:%xmm[0-9]+]]
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; CHECK: , [[XMM2]]
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; CHECK: cvtsi2ssl %{{.*}}, [[XMM2]]
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;
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define float @f2(i32 %m) nounwind uwtable readnone ssp {
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entry:
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%tobool3 = icmp eq i32 %m, 0
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br i1 %tobool3, label %for.end, label %for.body
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for.body: ; preds = %entry, %for.body
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%m.addr.07 = phi i32 [ %dec, %for.body ], [ %m, %entry ]
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%s1.06 = phi float [ %add, %for.body ], [ 0.000000e+00, %entry ]
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%s2.05 = phi float [ %add2, %for.body ], [ 0.000000e+00, %entry ]
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%n.04 = phi i32 [ %inc, %for.body ], [ 1, %entry ]
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%conv = sitofp i32 %n.04 to float
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%add = fadd float %s1.06, %conv
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%conv1 = sitofp i32 %m.addr.07 to float
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%add2 = fadd float %s2.05, %conv1
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%inc = add nsw i32 %n.04, 1
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%dec = add nsw i32 %m.addr.07, -1
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%tobool = icmp eq i32 %dec, 0
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br i1 %tobool, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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%s1.0.lcssa = phi float [ 0.000000e+00, %entry ], [ %add, %for.body ]
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%s2.0.lcssa = phi float [ 0.000000e+00, %entry ], [ %add2, %for.body ]
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%sub = fsub float %s1.0.lcssa, %s2.0.lcssa
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ret float %sub
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}
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