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llvm-mirror/test/Transforms/IndVarSimplify/floating-point-iv.ll
Philip Reames 9be1866c73 [Tests] Add a few more tests for idioms with FP induction variables 
llvm-svn: 374807
2019-10-14 19:10:39 +00:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -indvars -S | FileCheck %s
define void @test1() nounwind {
; CHECK-LABEL: @test1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB:%.*]]
; CHECK: bb:
; CHECK-NEXT: [[IV_INT:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[DOTINT:%.*]], [[BB]] ]
; CHECK-NEXT: [[INDVAR_CONV:%.*]] = sitofp i32 [[IV_INT]] to double
; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @foo(double [[INDVAR_CONV]]) #0
; CHECK-NEXT: [[DOTINT]] = add nuw nsw i32 [[IV_INT]], 1
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[DOTINT]], 10000
; CHECK-NEXT: br i1 [[TMP1]], label [[BB]], label [[RETURN:%.*]]
; CHECK: return:
; CHECK-NEXT: ret void
;
entry:
br label %bb
bb: ; preds = %bb, %entry
%iv = phi double [ 0.000000e+00, %entry ], [ %1, %bb ]
%0 = tail call i32 @foo(double %iv) nounwind
%1 = fadd double %iv, 1.000000e+00
%2 = fcmp olt double %1, 1.000000e+04
br i1 %2, label %bb, label %return
return: ; preds = %bb
ret void
}
declare i32 @foo(double)
define void @test2() nounwind {
; CHECK-LABEL: @test2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB:%.*]]
; CHECK: bb:
; CHECK-NEXT: [[IV_INT:%.*]] = phi i32 [ -10, [[ENTRY:%.*]] ], [ [[DOTINT:%.*]], [[BB]] ]
; CHECK-NEXT: [[INDVAR_CONV:%.*]] = sitofp i32 [[IV_INT]] to double
; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @foo(double [[INDVAR_CONV]]) #0
; CHECK-NEXT: [[DOTINT]] = add nsw i32 [[IV_INT]], 2
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[DOTINT]], -1
; CHECK-NEXT: br i1 [[TMP1]], label [[BB]], label [[RETURN:%.*]]
; CHECK: return:
; CHECK-NEXT: ret void
;
entry:
br label %bb
bb: ; preds = %bb, %entry
%iv = phi double [ -10.000000e+00, %entry ], [ %1, %bb ]
%0 = tail call i32 @foo(double %iv) nounwind
%1 = fadd double %iv, 2.000000e+00
%2 = fcmp olt double %1, -1.000000e+00
br i1 %2, label %bb, label %return
return: ; preds = %bb
ret void
}
define void @test3() nounwind {
; CHECK-LABEL: @test3(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB:%.*]]
; CHECK: bb:
; CHECK-NEXT: [[IV:%.*]] = phi double [ 0.000000e+00, [[ENTRY:%.*]] ], [ [[TMP1:%.*]], [[BB]] ]
; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @foo(double [[IV]]) #0
; CHECK-NEXT: [[TMP1]] = fadd double [[IV]], 1.000000e+00
; CHECK-NEXT: br i1 false, label [[BB]], label [[RETURN:%.*]]
; CHECK: return:
; CHECK-NEXT: ret void
;
entry:
br label %bb
bb: ; preds = %bb, %entry
%iv = phi double [ 0.000000e+00, %entry ], [ %1, %bb ]
%0 = tail call i32 @foo(double %iv) nounwind
%1 = fadd double %iv, 1.000000e+00
%2 = fcmp olt double %1, -1.000000e+00
br i1 %2, label %bb, label %return
return:
ret void
}
define void @test4() nounwind {
; CHECK-LABEL: @test4(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB:%.*]]
; CHECK: bb:
; CHECK-NEXT: [[IV_INT:%.*]] = phi i32 [ 40, [[ENTRY:%.*]] ], [ [[DOTINT:%.*]], [[BB]] ]
; CHECK-NEXT: [[INDVAR_CONV:%.*]] = sitofp i32 [[IV_INT]] to double
; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @foo(double [[INDVAR_CONV]]) #0
; CHECK-NEXT: [[DOTINT]] = add nsw i32 [[IV_INT]], -1
; CHECK-NEXT: br i1 false, label [[BB]], label [[RETURN:%.*]]
; CHECK: return:
; CHECK-NEXT: ret void
;
entry:
br label %bb
bb: ; preds = %bb, %entry
%iv = phi double [ 40.000000e+00, %entry ], [ %1, %bb ]
%0 = tail call i32 @foo(double %iv) nounwind
%1 = fadd double %iv, -1.000000e+00
%2 = fcmp olt double %1, 1.000000e+00
br i1 %2, label %bb, label %return
return:
ret void
}
; PR6761
define void @test5() nounwind {
; <label>:0
; CHECK-LABEL: @test5(
; CHECK-NEXT: br label [[TMP1:%.*]]
; CHECK: 1:
; CHECK-NEXT: [[DOTINT:%.*]] = phi i32 [ 9, [[TMP0:%.*]] ], [ [[DOTINT1:%.*]], [[TMP1]] ]
; CHECK-NEXT: [[TMP2:%.*]] = tail call i32 @foo(double 0.000000e+00)
; CHECK-NEXT: [[DOTINT1]] = add nsw i32 [[DOTINT]], -1
; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[DOTINT1]], 0
; CHECK-NEXT: br i1 [[TMP3]], label [[EXIT:%.*]], label [[TMP1]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
br label %1
; <label>:1
%2 = phi double [ 9.000000e+00, %0 ], [ %4, %1 ]
%3 = tail call i32 @foo(double 0.0)
%4 = fadd double %2, -1.000000e+00
%5 = fcmp ult double %4, 0.000000e+00
br i1 %5, label %exit, label %1
exit:
ret void
}
define double @test_max_be() {
; CHECK-LABEL: @test_max_be(
; CHECK-NEXT: bb4:
; CHECK-NEXT: br label [[BB8:%.*]]
; CHECK: bb8:
; CHECK-NEXT: [[TMP10:%.*]] = phi double [ 0.000000e+00, [[BB4:%.*]] ], [ [[TMP12:%.*]], [[BB22:%.*]] ]
; CHECK-NEXT: [[TMP11_INT:%.*]] = phi i32 [ 0, [[BB4]] ], [ [[TMP13_INT:%.*]], [[BB22]] ]
; CHECK-NEXT: [[INDVAR_CONV:%.*]] = sitofp i32 [[TMP11_INT]] to double
; CHECK-NEXT: [[TMP12]] = fadd double [[TMP10]], [[INDVAR_CONV]]
; CHECK-NEXT: [[TMP13_INT]] = add nuw nsw i32 [[TMP11_INT]], 1
; CHECK-NEXT: [[TMP14:%.*]] = icmp slt i32 [[TMP13_INT]], 99999
; CHECK-NEXT: br i1 [[TMP14]], label [[BB22]], label [[BB6:%.*]]
; CHECK: bb22:
; CHECK-NEXT: br i1 true, label [[BB8]], label [[BB6]]
; CHECK: bb6:
; CHECK-NEXT: [[TMP12_LCSSA:%.*]] = phi double [ [[TMP12]], [[BB22]] ], [ [[TMP12]], [[BB8]] ]
; CHECK-NEXT: ret double [[TMP12_LCSSA]]
;
bb4:
br label %bb8
bb8:
%tmp9 = phi i64 [ 1, %bb4 ], [ %tmp23, %bb22 ]
%tmp10 = phi double [ 0.000000e+00, %bb4 ], [ %tmp12, %bb22 ]
%tmp11 = phi double [ 0.000000e+00, %bb4 ], [ %tmp13, %bb22 ]
%tmp12 = fadd double %tmp10, %tmp11
%tmp13 = fadd double %tmp11, 1.000000e+00
%tmp14 = fcmp olt double %tmp13, 9.999900e+04
br i1 %tmp14, label %bb22, label %bb6
bb22:
%tmp23 = add nuw nsw i64 %tmp9, 1
%tmp24 = icmp ult i64 %tmp9, 1048576
br i1 %tmp24, label %bb8, label %bb6
bb6:
ret double %tmp12
}
define float @test_max_be2() {
; CHECK-LABEL: @test_max_be2(
; CHECK-NEXT: bb4:
; CHECK-NEXT: br label [[BB8:%.*]]
; CHECK: bb8:
; CHECK-NEXT: [[TMP10:%.*]] = phi float [ 0.000000e+00, [[BB4:%.*]] ], [ [[TMP12:%.*]], [[BB22:%.*]] ]
; CHECK-NEXT: [[TMP11_INT:%.*]] = phi i32 [ 0, [[BB4]] ], [ [[TMP13_INT:%.*]], [[BB22]] ]
; CHECK-NEXT: [[INDVAR_CONV:%.*]] = sitofp i32 [[TMP11_INT]] to float
; CHECK-NEXT: [[TMP12]] = fadd float [[TMP10]], [[INDVAR_CONV]]
; CHECK-NEXT: [[TMP13_INT]] = add nuw nsw i32 [[TMP11_INT]], 1
; CHECK-NEXT: [[TMP14:%.*]] = icmp slt i32 [[TMP13_INT]], 99999
; CHECK-NEXT: br i1 [[TMP14]], label [[BB22]], label [[BB6:%.*]]
; CHECK: bb22:
; CHECK-NEXT: br i1 true, label [[BB8]], label [[BB6]]
; CHECK: bb6:
; CHECK-NEXT: [[TMP12_LCSSA:%.*]] = phi float [ [[TMP12]], [[BB22]] ], [ [[TMP12]], [[BB8]] ]
; CHECK-NEXT: ret float [[TMP12_LCSSA]]
;
bb4:
br label %bb8
bb8:
%tmp9 = phi i64 [ 1, %bb4 ], [ %tmp23, %bb22 ]
%tmp10 = phi float [ 0.000000e+00, %bb4 ], [ %tmp12, %bb22 ]
%tmp11 = phi float [ 0.000000e+00, %bb4 ], [ %tmp13, %bb22 ]
%tmp12 = fadd float %tmp10, %tmp11
%tmp13 = fadd float %tmp11, 1.000000e+00
%tmp14 = fcmp olt float %tmp13, 9.999900e+04
br i1 %tmp14, label %bb22, label %bb6
bb22:
%tmp23 = add nuw nsw i64 %tmp9, 1
%tmp24 = icmp ult i64 %tmp9, 1048576
br i1 %tmp24, label %bb8, label %bb6
bb6:
ret float %tmp12
}
; Bounds check
define float @test_max_be3() {
; CHECK-LABEL: @test_max_be3(
; CHECK-NEXT: bb4:
; CHECK-NEXT: br label [[BB8:%.*]]
; CHECK: bb8:
; CHECK-NEXT: [[TMP10:%.*]] = phi float [ 0.000000e+00, [[BB4:%.*]] ], [ [[TMP12:%.*]], [[BB22:%.*]] ]
; CHECK-NEXT: [[TMP11_INT:%.*]] = phi i32 [ 0, [[BB4]] ], [ [[TMP13_INT:%.*]], [[BB22]] ]
; CHECK-NEXT: [[INDVAR_CONV:%.*]] = sitofp i32 [[TMP11_INT]] to float
; CHECK-NEXT: [[TMP12]] = fadd float [[TMP10]], [[INDVAR_CONV]]
; CHECK-NEXT: [[TMP13_INT]] = add nuw nsw i32 [[TMP11_INT]], 1
; CHECK-NEXT: [[TMP14:%.*]] = icmp slt i32 [[TMP13_INT]], 99999
; CHECK-NEXT: br i1 [[TMP14]], label [[BB22]], label [[BB6:%.*]]
; CHECK: bb22:
; CHECK-NEXT: br i1 true, label [[BB8]], label [[BB6]]
; CHECK: bb6:
; CHECK-NEXT: [[TMP12_LCSSA:%.*]] = phi float [ [[TMP12]], [[BB22]] ], [ [[TMP12]], [[BB8]] ]
; CHECK-NEXT: ret float [[TMP12_LCSSA]]
;
bb4:
br label %bb8
bb8:
%tmp9 = phi i64 [ 1, %bb4 ], [ %tmp23, %bb22 ]
%tmp10 = phi float [ 0.000000e+00, %bb4 ], [ %tmp12, %bb22 ]
%tmp11 = phi float [ 0.000000e+00, %bb4 ], [ %tmp13, %bb22 ]
%tmp12 = fadd float %tmp10, %tmp11
%tmp13 = fadd float %tmp11, 1.000000e+00
%tmp14 = fcmp olt float %tmp13, 9.999900e+04
br i1 %tmp14, label %bb22, label %bb6
bb22:
%tmp23 = add nuw nsw i64 %tmp9, 1
;; 2^23 = 16777215
%tmp24 = icmp ult i64 %tmp9, 16777215
br i1 %tmp24, label %bb8, label %bb6
bb6:
ret float %tmp12
}
; Show that given a computeable exit count, we can remove an
; fcmp of a casted integer IV. (TODO)
define void @fcmp1() nounwind {
; CHECK-LABEL: @fcmp1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB:%.*]]
; CHECK: bb:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i64 [[IV]], 20000
; CHECK-NEXT: br i1 [[CMP1]], label [[BACKEDGE]], label [[RETURN:%.*]]
; CHECK: backedge:
; CHECK-NEXT: [[IV_FP:%.*]] = sitofp i64 [[IV]] to double
; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @foo(double [[IV_FP]]) #0
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[CMP2:%.*]] = fcmp olt double [[IV_FP]], 1.000000e+04
; CHECK-NEXT: br i1 [[CMP2]], label [[BB]], label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: ret void
;
entry:
br label %bb
bb: ; preds = %bb, %entry
%iv = phi i64 [ 0, %entry ], [ %iv.next, %backedge ]
%cmp1 = icmp slt i64 %iv, 20000
br i1 %cmp1, label %backedge, label %return
backedge:
%iv.fp = sitofp i64 %iv to double
tail call i32 @foo(double %iv.fp) nounwind
%iv.next = add nsw nuw i64 %iv, 1
%cmp2 = fcmp olt double %iv.fp, 1.000000e+04
br i1 %cmp2, label %bb, label %return
return: ; preds = %bb
ret void
}
define void @fcmp2() nounwind {
; CHECK-LABEL: @fcmp2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB:%.*]]
; CHECK: bb:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i64 [[IV]], 2000
; CHECK-NEXT: br i1 [[CMP1]], label [[BACKEDGE]], label [[RETURN:%.*]]
; CHECK: backedge:
; CHECK-NEXT: [[IV_FP:%.*]] = sitofp i64 [[IV]] to double
; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @foo(double [[IV_FP]]) #0
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[CMP2:%.*]] = fcmp olt double [[IV_FP]], 1.000000e+04
; CHECK-NEXT: br i1 [[CMP2]], label [[BB]], label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: ret void
;
entry:
br label %bb
bb: ; preds = %bb, %entry
%iv = phi i64 [ 0, %entry ], [ %iv.next, %backedge ]
%cmp1 = icmp slt i64 %iv, 2000
br i1 %cmp1, label %backedge, label %return
backedge:
%iv.fp = sitofp i64 %iv to double
tail call i32 @foo(double %iv.fp) nounwind
%iv.next = add nsw nuw i64 %iv, 1
%cmp2 = fcmp olt double %iv.fp, 1.000000e+04
br i1 %cmp2, label %bb, label %return
return: ; preds = %bb
ret void
}
define void @fcmp_neg1() nounwind {
; CHECK-LABEL: @fcmp_neg1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB:%.*]]
; CHECK: bb:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i64 [[IV]], -20
; CHECK-NEXT: br i1 [[CMP1]], label [[BACKEDGE]], label [[RETURN:%.*]]
; CHECK: backedge:
; CHECK-NEXT: [[IV_FP:%.*]] = sitofp i64 [[IV]] to double
; CHECK-NEXT: [[TMP0:%.*]] = tail call i32 @foo(double [[IV_FP]]) #0
; CHECK-NEXT: [[IV_NEXT]] = add nuw i64 [[IV]], 1
; CHECK-NEXT: [[CMP2:%.*]] = fcmp olt double [[IV_FP]], 1.000000e+04
; CHECK-NEXT: br i1 [[CMP2]], label [[BB]], label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: ret void
;
entry:
br label %bb
bb: ; preds = %bb, %entry
%iv = phi i64 [ 0, %entry ], [ %iv.next, %backedge ]
;; Range fact outside precise integer region
%cmp1 = icmp ult i64 %iv, -20
br i1 %cmp1, label %backedge, label %return
backedge:
%iv.fp = sitofp i64 %iv to double
tail call i32 @foo(double %iv.fp) nounwind
%iv.next = add nuw i64 %iv, 1
%cmp2 = fcmp olt double %iv.fp, 1.000000e+04
br i1 %cmp2, label %bb, label %return
return: ; preds = %bb
ret void
}
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