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c934ce7ceb
Currently UREM & SREM on constant ranges produces overly pessimistic results for single element constant ranges. Delegate to APInt's implementation if both operands are single element constant ranges. We already do something similar for other binary operators, like binary AND. Fixes PR49731. Reviewed By: lebedev.ri Differential Revision: https://reviews.llvm.org/D105115
154 lines
4.3 KiB
LLVM
154 lines
4.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -ipsccp -S | FileCheck %s
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declare void @use(i1)
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define void @sdiv1_cmp_constants(i32 %x) {
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; CHECK-LABEL: @sdiv1_cmp_constants(
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; CHECK-NEXT: [[D:%.*]] = sdiv i32 1, [[X:%.*]]
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; CHECK-NEXT: [[C_0:%.*]] = icmp slt i32 0, [[D]]
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; CHECK-NEXT: call void @use(i1 [[C_0]])
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: [[C_3:%.*]] = icmp eq i32 1, [[D]]
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; CHECK-NEXT: call void @use(i1 [[C_3]])
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; CHECK-NEXT: [[C_4:%.*]] = icmp eq i32 0, [[D]]
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; CHECK-NEXT: call void @use(i1 [[C_4]])
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: ret void
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;
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%d = sdiv i32 1, %x
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%c.0 = icmp slt i32 0, %d
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call void @use(i1 %c.0)
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%c.1 = icmp slt i32 1, %d
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call void @use(i1 %c.1)
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%c.2 = icmp slt i32 2, %d
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call void @use(i1 %c.2)
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%c.3 = icmp eq i32 1, %d
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call void @use(i1 %c.3)
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%c.4 = icmp eq i32 0, %d
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call void @use(i1 %c.4)
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%c.5 = icmp eq i32 2, %d
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call void @use(i1 %c.5)
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ret void
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}
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define void @sdiv1_cmp_range_1(i32 %x, i1 %c) {
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; CHECK-LABEL: @sdiv1_cmp_range_1(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[BB3:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: [[P:%.*]] = phi i32 [ 1, [[BB1]] ], [ 2, [[BB2]] ]
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; CHECK-NEXT: [[D:%.*]] = sdiv i32 1, [[X:%.*]]
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: [[C_1:%.*]] = icmp eq i32 [[P]], [[D]]
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; CHECK-NEXT: call void @use(i1 [[C_1]])
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; CHECK-NEXT: ret void
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;
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br i1 %c, label %bb1, label %bb2
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bb1:
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br label %bb3
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bb2:
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br label %bb3
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bb3:
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%p = phi i32 [1, %bb1], [2, %bb2]
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%d = sdiv i32 1, %x
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%c.0 = icmp slt i32 %p, %d
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call void @use(i1 %c.0)
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%c.1 = icmp eq i32 %p, %d
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call void @use(i1 %c.1)
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ret void
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}
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define void @sdiv1_cmp_range_2(i32 %x, i1 %c) {
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; CHECK-LABEL: @sdiv1_cmp_range_2(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[BB3:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: br label [[BB3]]
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; CHECK: bb3:
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; CHECK-NEXT: [[P:%.*]] = phi i32 [ 3, [[BB1]] ], [ 2, [[BB2]] ]
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; CHECK-NEXT: [[D:%.*]] = sdiv i32 1, [[X:%.*]]
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: ret void
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;
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br i1 %c, label %bb1, label %bb2
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bb1:
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br label %bb3
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bb2:
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br label %bb3
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bb3:
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%p = phi i32 [3, %bb1], [2, %bb2]
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%d = sdiv i32 1, %x
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%c.0 = icmp slt i32 %p, %d
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call void @use(i1 %c.0)
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%c.1 = icmp eq i32 %p, %d
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call void @use(i1 %c.1)
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ret void
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}
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define void @urem_cmp_constants() {
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; CHECK-LABEL: @urem_cmp_constants(
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: [[UREM_3:%.*]] = urem i16 12704, 0
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; CHECK-NEXT: [[C_5:%.*]] = icmp eq i16 [[UREM_3]], 1
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; CHECK-NEXT: call void @use(i1 [[C_5]])
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; CHECK-NEXT: ret void
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;
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%sel = select i1 false, i16 0, i16 12704
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%urem.1 = urem i16 %sel, 12704
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%c.1 = icmp eq i16 %urem.1, 0
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call void @use(i1 %c.1)
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%c.2 = icmp eq i16 %urem.1, 1
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call void @use(i1 %c.2)
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%urem.2 = urem i16 %sel, 3
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%c.3 = icmp eq i16 %urem.2, 2
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call void @use(i1 %c.3)
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%c.4 = icmp eq i16 %urem.2, 1
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call void @use(i1 %c.4)
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%urem.3 = urem i16 %sel, 0
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%c.5 = icmp eq i16 %urem.3, 1
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call void @use(i1 %c.5)
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ret void
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}
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define void @srem_cmp_constants() {
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; CHECK-LABEL: @srem_cmp_constants(
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: call void @use(i1 false)
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; CHECK-NEXT: [[SREM_3:%.*]] = srem i16 12704, 0
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; CHECK-NEXT: [[C_5:%.*]] = icmp eq i16 [[SREM_3]], 1
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; CHECK-NEXT: call void @use(i1 [[C_5]])
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; CHECK-NEXT: ret void
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;
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%sel = select i1 false, i16 0, i16 12704
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%srem.1 = srem i16 %sel, 12704
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%c.1 = icmp eq i16 %srem.1, 0
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call void @use(i1 %c.1)
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%c.2 = icmp eq i16 %srem.1, 1
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call void @use(i1 %c.2)
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%srem.2 = srem i16 %sel, 3
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%c.3 = icmp eq i16 %srem.2, 2
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call void @use(i1 %c.3)
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%c.4 = icmp eq i16 %srem.2, 1
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call void @use(i1 %c.4)
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%srem.3 = srem i16 %sel, 0
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%c.5 = icmp eq i16 %srem.3, 1
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call void @use(i1 %c.5)
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ret void
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}
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