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Fold or-phi test

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bipmis 2023-09-11 17:33:36 +01:00
parent 93bd428742
commit 74e4e9e6f2
1 changed files with 104 additions and 0 deletions
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104
llvm/test/Transforms/InstCombine/phi.ll
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@ -2363,3 +2363,107 @@ _Z3fooPKc.exit20:
%and9 = and i1 %tobool, %retval.0.i19
ret i1 %and9
}
define i1 @fold_or_phi_into_or_icmp(ptr noundef readnone %dv1, ptr noundef %val1, ptr noundef readnone %dv2, ptr noundef %val2) {
; CHECK-LABEL: @fold_or_phi_into_or_icmp(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP_I:%.*]] = icmp eq ptr [[VAL1:%.*]], null
; CHECK-NEXT: br i1 [[CMP_I]], label [[_Z3FOOPKC_EXIT:%.*]], label [[WHILE_COND_I:%.*]]
; CHECK: while.cond.i:
; CHECK-NEXT: [[TEST_0_I:%.*]] = phi ptr [ [[INCDEC_PTR_I:%.*]], [[WHILE_COND_I]] ], [ [[VAL1]], [[ENTRY:%.*]] ]
; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[TEST_0_I]], align 1
; CHECK-NEXT: [[CMP1_NOT_I:%.*]] = icmp eq i8 [[TMP0]], 0
; CHECK-NEXT: [[INCDEC_PTR_I]] = getelementptr inbounds i8, ptr [[TEST_0_I]], i64 1
; CHECK-NEXT: br i1 [[CMP1_NOT_I]], label [[WHILE_END_I:%.*]], label [[WHILE_COND_I]]
; CHECK: while.end.i:
; CHECK-NEXT: [[SUB_PTR_LHS_CAST_I:%.*]] = ptrtoint ptr [[TEST_0_I]] to i64
; CHECK-NEXT: [[SUB_PTR_RHS_CAST_I:%.*]] = ptrtoint ptr [[VAL1]] to i64
; CHECK-NEXT: [[SUB_PTR_SUB_I:%.*]] = sub i64 [[SUB_PTR_LHS_CAST_I]], [[SUB_PTR_RHS_CAST_I]]
; CHECK-NEXT: br label [[_Z3FOOPKC_EXIT]]
; CHECK: _Z3fooPKc.exit:
; CHECK-NEXT: [[RETVAL_0_I:%.*]] = phi i64 [ [[SUB_PTR_SUB_I]], [[WHILE_END_I]] ], [ 0, [[ENTRY]] ]
; CHECK-NEXT: [[CMP_I10:%.*]] = icmp eq ptr [[VAL2:%.*]], null
; CHECK-NEXT: br i1 [[CMP_I10]], label [[_Z3FOOPKC_EXIT19:%.*]], label [[WHILE_COND_I11:%.*]]
; CHECK: while.cond.i11:
; CHECK-NEXT: [[TEST_0_I12:%.*]] = phi ptr [ [[INCDEC_PTR_I14:%.*]], [[WHILE_COND_I11]] ], [ [[VAL2]], [[_Z3FOOPKC_EXIT]] ]
; CHECK-NEXT: [[TMP1:%.*]] = load i8, ptr [[TEST_0_I12]], align 1
; CHECK-NEXT: [[CMP1_NOT_I13:%.*]] = icmp eq i8 [[TMP1]], 0
; CHECK-NEXT: [[INCDEC_PTR_I14]] = getelementptr inbounds i8, ptr [[TEST_0_I12]], i64 1
; CHECK-NEXT: br i1 [[CMP1_NOT_I13]], label [[WHILE_END_I15:%.*]], label [[WHILE_COND_I11]]
; CHECK: while.end.i15:
; CHECK-NEXT: [[SUB_PTR_LHS_CAST_I16:%.*]] = ptrtoint ptr [[TEST_0_I12]] to i64
; CHECK-NEXT: [[SUB_PTR_RHS_CAST_I17:%.*]] = ptrtoint ptr [[VAL2]] to i64
; CHECK-NEXT: [[SUB_PTR_SUB_I18:%.*]] = sub i64 [[SUB_PTR_LHS_CAST_I16]], [[SUB_PTR_RHS_CAST_I17]]
; CHECK-NEXT: br label [[_Z3FOOPKC_EXIT19]]
; CHECK: _Z3fooPKc.exit19:
; CHECK-NEXT: [[RETVAL_0_I20:%.*]] = phi i64 [ [[SUB_PTR_SUB_I18]], [[WHILE_END_I15]] ], [ 0, [[_Z3FOOPKC_EXIT]] ]
; CHECK-NEXT: [[TMP2:%.*]] = or i64 [[RETVAL_0_I]], [[RETVAL_0_I20]]
; CHECK-NEXT: [[OR_COND_NOT:%.*]] = icmp eq i64 [[TMP2]], 0
; CHECK-NEXT: br i1 [[OR_COND_NOT]], label [[IF_THEN:%.*]], label [[IF_END4:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr [[DV1:%.*]], [[DV2:%.*]]
; CHECK-NEXT: br label [[CLEANUP:%.*]]
; CHECK: if.end4:
; CHECK-NEXT: [[TOBOOL2:%.*]] = icmp ne i64 [[RETVAL_0_I20]], 0
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i64 [[RETVAL_0_I]], 0
; CHECK-NEXT: [[OR_COND10:%.*]] = and i1 [[TOBOOL]], [[TOBOOL2]]
; CHECK-NEXT: br label [[CLEANUP]]
; CHECK: cleanup:
; CHECK-NEXT: [[RETVAL_0:%.*]] = phi i1 [ [[CMP]], [[IF_THEN]] ], [ [[OR_COND10]], [[IF_END4]] ]
; CHECK-NEXT: ret i1 [[RETVAL_0]]
;
entry:
%cmp.i = icmp eq ptr %val1, null
br i1 %cmp.i, label %_Z3fooPKc.exit, label %while.cond.i
while.cond.i:
%test.0.i = phi ptr [ %incdec.ptr.i, %while.cond.i ], [ %val1, %entry ]
%0 = load i8, ptr %test.0.i, align 1
%cmp1.not.i = icmp eq i8 %0, 0
%incdec.ptr.i = getelementptr inbounds i8, ptr %test.0.i, i64 1
br i1 %cmp1.not.i, label %while.end.i, label %while.cond.i
while.end.i:
%sub.ptr.lhs.cast.i = ptrtoint ptr %test.0.i to i64
%sub.ptr.rhs.cast.i = ptrtoint ptr %val1 to i64
%sub.ptr.sub.i = sub i64 %sub.ptr.lhs.cast.i, %sub.ptr.rhs.cast.i
br label %_Z3fooPKc.exit
_Z3fooPKc.exit:
%retval.0.i = phi i64 [ %sub.ptr.sub.i, %while.end.i ], [ 0, %entry ]
%cmp.i10 = icmp eq ptr %val2, null
br i1 %cmp.i10, label %_Z3fooPKc.exit19, label %while.cond.i11
while.cond.i11:
%test.0.i12 = phi ptr [ %incdec.ptr.i14, %while.cond.i11 ], [ %val2, %_Z3fooPKc.exit ]
%1 = load i8, ptr %test.0.i12, align 1
%cmp1.not.i13 = icmp eq i8 %1, 0
%incdec.ptr.i14 = getelementptr inbounds i8, ptr %test.0.i12, i64 1
br i1 %cmp1.not.i13, label %while.end.i15, label %while.cond.i11
while.end.i15:
%sub.ptr.lhs.cast.i16 = ptrtoint ptr %test.0.i12 to i64
%sub.ptr.rhs.cast.i17 = ptrtoint ptr %val2 to i64
%sub.ptr.sub.i18 = sub i64 %sub.ptr.lhs.cast.i16, %sub.ptr.rhs.cast.i17
br label %_Z3fooPKc.exit19
_Z3fooPKc.exit19:
%retval.0.i20 = phi i64 [ %sub.ptr.sub.i18, %while.end.i15 ], [ 0, %_Z3fooPKc.exit ]
%2 = or i64 %retval.0.i, %retval.0.i20
%or.cond.not = icmp eq i64 %2, 0
br i1 %or.cond.not, label %if.then, label %if.end4
if.then:
%cmp = icmp eq ptr %dv1, %dv2
br label %cleanup
if.end4:
%tobool2 = icmp ne i64 %retval.0.i20, 0
%tobool = icmp ne i64 %retval.0.i, 0
%or.cond10 = and i1 %tobool, %tobool2
br label %cleanup
cleanup:
%retval.0 = phi i1 [ %cmp, %if.then ], [ %or.cond10, %if.end4 ]
ret i1 %retval.0
}