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llvm-project/llvm/test/Transforms/InstSimplify/assume_icmp.ll

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[InstCombine] Add tests for assume implication (NFC)
2020-06-28 22:16:35 +08:00
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
[InstSimplify] Move assume icmp test (NFC) Move this test from InstCombine into InstSimplify.
2020-07-02 05:35:06 +08:00
; RUN: opt < %s -instsimplify -S | FileCheck %s
[InstCombine] Add tests for assume implication (NFC)
2020-06-28 22:16:35 +08:00
declare void @llvm.assume(i1)
declare void @use(i1)
define void @basic_ugt(i32 %x, i32 %y) {
; CHECK-LABEL: @basic_ugt(
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP1]])
[InstSimplify] Fold icmp with dominating assume If we assume(x > y), then we should be able to fold the basic implications of that, like x >= y. This already happens if either one of the operands is constant (LVI) or if the conditions are exactly the same (GVN), but not if we have an implication with non-constant operands. Support this by querying AssumptionCache. Fixes https://bugs.llvm.org/show_bug.cgi?id=40149. Differential Revision: https://reviews.llvm.org/D82717
2020-06-28 21:59:56 +08:00
; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: call void @use(i1 true)
[InstCombine] Add tests for assume implication (NFC)
2020-06-28 22:16:35 +08:00
; CHECK-NEXT: ret void
;
%cmp1 = icmp ugt i32 %x, %y
call void @llvm.assume(i1 %cmp1)
%cmp2 = icmp ugt i32 %x, %y
call void @use(i1 %cmp2)
%cmp3 = icmp uge i32 %x, %y
call void @use(i1 %cmp3)
%cmp4 = icmp ult i32 %x, %y
call void @use(i1 %cmp4)
%cmp5 = icmp ule i32 %x, %y
call void @use(i1 %cmp5)
%cmp6 = icmp ugt i32 %y, %x
call void @use(i1 %cmp6)
%cmp7 = icmp uge i32 %y, %x
call void @use(i1 %cmp7)
%cmp8 = icmp ult i32 %y, %x
call void @use(i1 %cmp8)
%cmp9 = icmp ule i32 %y, %x
call void @use(i1 %cmp9)
ret void
}
define void @basic_uge(i32 %x, i32 %y) {
; CHECK-LABEL: @basic_uge(
; CHECK-NEXT: [[CMP1:%.*]] = icmp uge i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP1]])
; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 [[X]], [[Y]]
; CHECK-NEXT: call void @use(i1 [[CMP2]])
[InstSimplify] Fold icmp with dominating assume If we assume(x > y), then we should be able to fold the basic implications of that, like x >= y. This already happens if either one of the operands is constant (LVI) or if the conditions are exactly the same (GVN), but not if we have an implication with non-constant operands. Support this by querying AssumptionCache. Fixes https://bugs.llvm.org/show_bug.cgi?id=40149. Differential Revision: https://reviews.llvm.org/D82717
2020-06-28 21:59:56 +08:00
; CHECK-NEXT: call void @use(i1 true)
; CHECK-NEXT: call void @use(i1 false)
[InstCombine] Add tests for assume implication (NFC)
2020-06-28 22:16:35 +08:00
; CHECK-NEXT: [[CMP5:%.*]] = icmp ule i32 [[X]], [[Y]]
; CHECK-NEXT: call void @use(i1 [[CMP5]])
[InstSimplify] Fold icmp with dominating assume If we assume(x > y), then we should be able to fold the basic implications of that, like x >= y. This already happens if either one of the operands is constant (LVI) or if the conditions are exactly the same (GVN), but not if we have an implication with non-constant operands. Support this by querying AssumptionCache. Fixes https://bugs.llvm.org/show_bug.cgi?id=40149. Differential Revision: https://reviews.llvm.org/D82717
2020-06-28 21:59:56 +08:00
; CHECK-NEXT: call void @use(i1 false)
[InstCombine] Add tests for assume implication (NFC)
2020-06-28 22:16:35 +08:00
; CHECK-NEXT: [[CMP7:%.*]] = icmp uge i32 [[Y]], [[X]]
; CHECK-NEXT: call void @use(i1 [[CMP7]])
; CHECK-NEXT: [[CMP8:%.*]] = icmp ult i32 [[Y]], [[X]]
; CHECK-NEXT: call void @use(i1 [[CMP8]])
[InstSimplify] Fold icmp with dominating assume If we assume(x > y), then we should be able to fold the basic implications of that, like x >= y. This already happens if either one of the operands is constant (LVI) or if the conditions are exactly the same (GVN), but not if we have an implication with non-constant operands. Support this by querying AssumptionCache. Fixes https://bugs.llvm.org/show_bug.cgi?id=40149. Differential Revision: https://reviews.llvm.org/D82717
2020-06-28 21:59:56 +08:00
; CHECK-NEXT: call void @use(i1 true)
[InstCombine] Add tests for assume implication (NFC)
2020-06-28 22:16:35 +08:00
; CHECK-NEXT: ret void
;
%cmp1 = icmp uge i32 %x, %y
call void @llvm.assume(i1 %cmp1)
%cmp2 = icmp ugt i32 %x, %y
call void @use(i1 %cmp2)
%cmp3 = icmp uge i32 %x, %y
call void @use(i1 %cmp3)
%cmp4 = icmp ult i32 %x, %y
call void @use(i1 %cmp4)
%cmp5 = icmp ule i32 %x, %y
call void @use(i1 %cmp5)
%cmp6 = icmp ugt i32 %y, %x
call void @use(i1 %cmp6)
%cmp7 = icmp uge i32 %y, %x
call void @use(i1 %cmp7)
%cmp8 = icmp ult i32 %y, %x
call void @use(i1 %cmp8)
%cmp9 = icmp ule i32 %y, %x
call void @use(i1 %cmp9)
ret void
}
[InstSimplify] Fold icmp with dominating assume If we assume(x > y), then we should be able to fold the basic implications of that, like x >= y. This already happens if either one of the operands is constant (LVI) or if the conditions are exactly the same (GVN), but not if we have an implication with non-constant operands. Support this by querying AssumptionCache. Fixes https://bugs.llvm.org/show_bug.cgi?id=40149. Differential Revision: https://reviews.llvm.org/D82717
2020-06-28 21:59:56 +08:00
; This does not simplify in InstSimplify, because AssumptionCache tracker
; does not track values through "and". The "and" assume will be broken
; down into two separate assume calls by InstCombine.
[InstCombine] Add tests for assume implication (NFC)
2020-06-28 22:16:35 +08:00
define void @and(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @and(
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[CMP2:%.*]] = icmp ugt i32 [[Z:%.*]], [[Y]]
[InstSimplify] Move assume icmp test (NFC) Move this test from InstCombine into InstSimplify.
2020-07-02 05:35:06 +08:00
; CHECK-NEXT: [[AND:%.*]] = and i1 [[CMP1]], [[CMP2]]
; CHECK-NEXT: call void @llvm.assume(i1 [[AND]])
[InstCombine] Add tests for assume implication (NFC)
2020-06-28 22:16:35 +08:00
; CHECK-NEXT: [[CMP3:%.*]] = icmp ugt i32 [[X]], [[Y]]
; CHECK-NEXT: call void @use(i1 [[CMP3]])
; CHECK-NEXT: [[CMP4:%.*]] = icmp uge i32 [[X]], [[Y]]
; CHECK-NEXT: call void @use(i1 [[CMP4]])
; CHECK-NEXT: [[CMP5:%.*]] = icmp ugt i32 [[Z]], [[Y]]
; CHECK-NEXT: call void @use(i1 [[CMP5]])
; CHECK-NEXT: [[CMP6:%.*]] = icmp uge i32 [[Z]], [[Y]]
; CHECK-NEXT: call void @use(i1 [[CMP6]])
; CHECK-NEXT: ret void
;
%cmp1 = icmp ugt i32 %x, %y
%cmp2 = icmp ugt i32 %z, %y
%and = and i1 %cmp1, %cmp2
call void @llvm.assume(i1 %and)
%cmp3 = icmp ugt i32 %x, %y
call void @use(i1 %cmp3)
%cmp4 = icmp uge i32 %x, %y
call void @use(i1 %cmp4)
%cmp5 = icmp ugt i32 %z, %y
call void @use(i1 %cmp5)
%cmp6 = icmp uge i32 %z, %y
call void @use(i1 %cmp6)
ret void
}