diff options
Diffstat (limited to 'test/CodeGen/X86/sse-domains.ll')
| -rw-r--r-- | test/CodeGen/X86/sse-domains.ll | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/test/CodeGen/X86/sse-domains.ll b/test/CodeGen/X86/sse-domains.ll index d26d322..3b66f4f 100644 --- a/test/CodeGen/X86/sse-domains.ll +++ b/test/CodeGen/X86/sse-domains.ll @@ -43,3 +43,44 @@ while.body: while.end: ret void } + +; CHECK: f2 +; +; This loop contains two cvtsi2ss instructions that update the same xmm +; register. Verify that the execution dependency fix pass breaks those +; dependencies by inserting xorps instructions. +; +; If the register allocator chooses different registers for the two cvtsi2ss +; instructions, they are still dependent on themselves. +; CHECK: xorps [[XMM1:%xmm[0-9]+]] +; CHECK: , [[XMM1]] +; CHECK: cvtsi2ss %{{.*}}, [[XMM1]] +; CHECK: xorps [[XMM2:%xmm[0-9]+]] +; CHECK: , [[XMM2]] +; CHECK: cvtsi2ss %{{.*}}, [[XMM2]] +; +define float @f2(i32 %m) nounwind uwtable readnone ssp { +entry: + %tobool3 = icmp eq i32 %m, 0 + br i1 %tobool3, label %for.end, label %for.body + +for.body: ; preds = %entry, %for.body + %m.addr.07 = phi i32 [ %dec, %for.body ], [ %m, %entry ] + %s1.06 = phi float [ %add, %for.body ], [ 0.000000e+00, %entry ] + %s2.05 = phi float [ %add2, %for.body ], [ 0.000000e+00, %entry ] + %n.04 = phi i32 [ %inc, %for.body ], [ 1, %entry ] + %conv = sitofp i32 %n.04 to float + %add = fadd float %s1.06, %conv + %conv1 = sitofp i32 %m.addr.07 to float + %add2 = fadd float %s2.05, %conv1 + %inc = add nsw i32 %n.04, 1 + %dec = add nsw i32 %m.addr.07, -1 + %tobool = icmp eq i32 %dec, 0 + br i1 %tobool, label %for.end, label %for.body + +for.end: ; preds = %for.body, %entry + %s1.0.lcssa = phi float [ 0.000000e+00, %entry ], [ %add, %for.body ] + %s2.0.lcssa = phi float [ 0.000000e+00, %entry ], [ %add2, %for.body ] + %sub = fsub float %s1.0.lcssa, %s2.0.lcssa + ret float %sub +} |