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60c5ae542c
Eliminate inttype phi with inttoptr/ptrtoint. This version fixed a bug in finding the matching phi -- the order of the incoming blocks may be different (triggered in self build on Windows). A new test case is added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315272 91177308-0d34-0410-b5e6-96231b3b80d8
54 lines
1.9 KiB
LLVM
54 lines
1.9 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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define void @test(float* %a, float* readnone %a_end, i64 %b, float* %bf) unnamed_addr {
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entry:
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%cmp1 = icmp ult float* %a, %a_end
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%b.float = inttoptr i64 %b to float*
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br i1 %cmp1, label %bb1, label %bb2
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bb1:
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br label %for.body.preheader
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bb2:
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%bfi = ptrtoint float* %bf to i64
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br label %for.body.preheader
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for.body.preheader: ; preds = %entry
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%b.phi = phi i64 [%b, %bb1], [%bfi, %bb2]
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br label %for.body
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; CHECK: for.body.preheader
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; CHECK: %b.phi = phi
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; CHECK: %b.phi.ptr =
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; CHECK: br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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; CHECK: for.body
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%a.addr.03 = phi float* [ %incdec.ptr, %for.body ], [ %a, %for.body.preheader ]
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%b.addr.float = phi float* [ %b.addr.float.inc, %for.body ], [ %b.float, %for.body.preheader ]
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%b.addr.i64 = phi i64 [ %b.addr.i64.inc, %for.body ], [ %b.phi, %for.body.preheader ]
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; CHECK: %a.addr.03 = phi float* [ %incdec.ptr, %for.body ], [ %a, %for.body.preheader ]
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; CHECK-NEXT: %b.addr.float = phi float* [ %b.addr.float.inc, %for.body ], [ %b.float, %for.body.preheader ]
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; CHECK-NEXT: %b.addr.i64.ptr = phi
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; CHECK-NOT: = phi i64
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; CHECK: = load
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%l = load float, float* %b.addr.float, align 4
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%mul.i = fmul float %l, 4.200000e+01
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store float %mul.i, float* %a.addr.03, align 4
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%b.addr.float.2 = inttoptr i64 %b.addr.i64 to float*
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%b.addr.float.inc = getelementptr inbounds float, float* %b.addr.float.2, i64 1
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; CHECK: store float %mul.i
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; CHECK-NOT: inttoptr
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; CHECK: %b.addr.float.inc =
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%b.addr.i64.inc = ptrtoint float* %b.addr.float.inc to i64
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; CHECK-NOT: ptrtoint
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%incdec.ptr = getelementptr inbounds float, float* %a.addr.03, i64 1
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; CHECK: %incdec.ptr =
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%cmp = icmp ult float* %incdec.ptr, %a_end
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br i1 %cmp, label %for.body, label %for.end
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for.end: ; preds = %for.body, %entry
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ret void
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}
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