0a781d98fb
This patch adds initial support for signed conditions. To do so, ConstraintElimination maintains two separate systems, one with facts from signed and one for unsigned conditions. To start with this means information from signed and unsigned conditions is kept completely separate. When it is safe to do so, information from signed conditions may be also transferred to the unsigned system and vice versa. That's left for follow-ups. In the initial version, de-composition of signed values just handles constants and otherwise just uses the value, without trying to decompose the operation. Again this can be extended in follow-up changes. The main benefit of this limited signed support is proving >=s 0 pre-conditions added in D118799. But even this initial version also fixes PR53273. Depends on D118799. Reviewed By: reames Differential Revision: https://reviews.llvm.org/D118806
72 lines
2.3 KiB
LLVM
72 lines
2.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
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declare void @use(i1)
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define void @test_unsigned_too_large(i128 %x) {
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; CHECK-LABEL: @test_unsigned_too_large(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C_1:%.*]] = icmp ule i128 [[X:%.*]], 12345678901234123123123
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; CHECK-NEXT: br i1 [[C_1]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[C_2:%.*]] = icmp ult i128 [[X]], -12345678901234123123123
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; CHECK-NEXT: call void @use(i1 [[C_2]])
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; CHECK-NEXT: [[C_3:%.*]] = icmp uge i128 [[X]], -12345678901234123123123
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; CHECK-NEXT: call void @use(i1 [[C_3]])
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; CHECK-NEXT: [[C_4:%.*]] = icmp uge i128 [[X]], -12345678901234123123123
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; CHECK-NEXT: call void @use(i1 [[C_4]])
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; CHECK-NEXT: ret void
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; CHECK: bb2:
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; CHECK-NEXT: ret void
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;
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entry:
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%c.1 = icmp ule i128 %x, 12345678901234123123123
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br i1 %c.1, label %bb1, label %bb2
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bb1:
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%c.2 = icmp ult i128 %x, -12345678901234123123123
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call void @use(i1 %c.2)
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%c.3 = icmp uge i128 %x, -12345678901234123123123
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call void @use(i1 %c.3)
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%c.4 = icmp uge i128 %x, -12345678901234123123123
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call void @use(i1 %c.4)
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ret void
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bb2:
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ret void
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}
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define void @test_signed_too_large(i128 %x) {
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; CHECK-LABEL: @test_signed_too_large(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[C_1:%.*]] = icmp sle i128 [[X:%.*]], 12345678901234123123123
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; CHECK-NEXT: br i1 [[C_1]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: [[C_2:%.*]] = icmp slt i128 [[X]], -12345678901234123123123
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; CHECK-NEXT: call void @use(i1 [[C_2]])
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; CHECK-NEXT: [[C_3:%.*]] = icmp sge i128 [[X]], -12345678901234123123123
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; CHECK-NEXT: call void @use(i1 [[C_3]])
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; CHECK-NEXT: [[C_4:%.*]] = icmp sge i128 [[X]], -12345678901234123123123
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; CHECK-NEXT: call void @use(i1 [[C_4]])
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; CHECK-NEXT: ret void
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; CHECK: bb2:
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; CHECK-NEXT: ret void
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;
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entry:
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%c.1 = icmp sle i128 %x, 12345678901234123123123
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br i1 %c.1, label %bb1, label %bb2
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bb1:
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%c.2 = icmp slt i128 %x, -12345678901234123123123
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call void @use(i1 %c.2)
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%c.3 = icmp sge i128 %x, -12345678901234123123123
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call void @use(i1 %c.3)
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%c.4 = icmp sge i128 %x, -12345678901234123123123
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call void @use(i1 %c.4)
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ret void
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bb2:
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ret void
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}
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