4cdc9dab0a
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. llvm-svn: 315272
59 lines
1.6 KiB
LLVM
59 lines
1.6 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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define void @matching_phi(i64 %a, float* %b, i1 %cond) {
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; CHECK-LABEL: @matching_phi
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entry:
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%cmp1 = icmp eq i1 %cond, 0
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%add.int = add i64 %a, 1
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%add = inttoptr i64 %add.int to float *
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%addb = getelementptr inbounds float, float* %b, i64 2
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%addb.int = ptrtoint float* %addb to i64
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br i1 %cmp1, label %A, label %B
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A:
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br label %C
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B:
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store float 1.0e+01, float* %add, align 4
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br label %C
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C:
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%a.addr.03 = phi float* [ %addb, %A ], [ %add, %B ]
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%b.addr.02 = phi i64 [ %addb.int, %A ], [ %add.int, %B ]
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%tmp = inttoptr i64 %b.addr.02 to float*
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; CHECK: %a.addr.03 = phi
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; CHECK-NEXT: = load
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%tmp1 = load float, float* %tmp, align 4
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%mul.i = fmul float %tmp1, 4.200000e+01
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store float %mul.i, float* %a.addr.03, align 4
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ret void
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}
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define void @no_matching_phi(i64 %a, float* %b, i1 %cond) {
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; CHECK-LABEL: @no_matching_phi
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entry:
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%cmp1 = icmp eq i1 %cond, 0
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%add.int = add i64 %a, 1
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%add = inttoptr i64 %add.int to float *
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%addb = getelementptr inbounds float, float* %b, i64 2
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%addb.int = ptrtoint float* %addb to i64
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br i1 %cmp1, label %A, label %B
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A:
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br label %C
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B:
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store float 1.0e+01, float* %add, align 4
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br label %C
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C:
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%a.addr.03 = phi float* [ %addb, %A ], [ %add, %B ]
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%b.addr.02 = phi i64 [ %addb.int, %B ], [ %add.int, %A ]
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%tmp = inttoptr i64 %b.addr.02 to float*
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%tmp1 = load float, float* %tmp, align 4
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; CHECK: %a.addr.03 = phi
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; CHECK-NEXT: %b.addr.02.ptr = phi
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; CHECK-NEXT: = load
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%mul.i = fmul float %tmp1, 4.200000e+01
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store float %mul.i, float* %a.addr.03, align 4
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ret void
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}
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