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clang-p2996/llvm/test/Transforms/IndVarSimplify/floating-point-iv.ll
Max Kazantsev 471217cff8 Revert "Revert "[IndVars] Replace PHIs if loop exits on 1st iteration"" 
This reverts commit 6fec6552f5.

The patch was reverted on incorrect claim that this patch may break LCSSA form
when the loop is not in a simplify form. All IndVars' transform insure that
the loop is in simplify and LCSSA form, so if it wasn't broken before this
transform, it will also not be broken after it.
2021-09-20 12:01:10 +07:00

371 lines
12 KiB
LLVM
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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]]) #[[ATTR0:[0-9]+]]
; 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]]) #[[ATTR0]]
; 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: [[TMP0:%.*]] = tail call i32 @foo(double 0.000000e+00) #[[ATTR0]]
; 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]]) #[[ATTR0]]
; 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 ult 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 ult 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 ult 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]]) #[[ATTR0]]
; 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]]) #[[ATTR0]]
; 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]]) #[[ATTR0]]
; 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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