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[InstCombine] Add tests for
icmp eq/ne ({su}div exact X, Y), C
; NFC
Differential Revision: https://reviews.llvm.org/D150090
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py | ||
; RUN: opt < %s -passes=instcombine -S | FileCheck %s | ||
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declare void @use.i8(i8) | ||
define i1 @sdiv_exact_eq_0(i8 %x, i8 %y) { | ||
; CHECK-LABEL: @sdiv_exact_eq_0( | ||
; CHECK-NEXT: [[D:%.*]] = sdiv exact i8 [[X:%.*]], [[Y:%.*]] | ||
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[D]], 0 | ||
; CHECK-NEXT: ret i1 [[R]] | ||
; | ||
%d = sdiv exact i8 %x, %y | ||
%r = icmp eq i8 %d, 0 | ||
ret i1 %r | ||
} | ||
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define i1 @udiv_exact_ne_0(i8 %x, i8 %y) { | ||
; CHECK-LABEL: @udiv_exact_ne_0( | ||
; CHECK-NEXT: [[R:%.*]] = icmp ule i8 [[Y:%.*]], [[X:%.*]] | ||
; CHECK-NEXT: ret i1 [[R]] | ||
; | ||
%d = udiv exact i8 %x, %y | ||
%r = icmp ne i8 %d, 0 | ||
ret i1 %r | ||
} | ||
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define i1 @sdiv_exact_ne_1(i8 %x, i8 %y) { | ||
; CHECK-LABEL: @sdiv_exact_ne_1( | ||
; CHECK-NEXT: [[D:%.*]] = sdiv exact i8 [[X:%.*]], [[Y:%.*]] | ||
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[D]], 0 | ||
; CHECK-NEXT: ret i1 [[R]] | ||
; | ||
%d = sdiv exact i8 %x, %y | ||
%r = icmp eq i8 %d, 0 | ||
ret i1 %r | ||
} | ||
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define i1 @udiv_exact_eq_1(i8 %x, i8 %y) { | ||
; CHECK-LABEL: @udiv_exact_eq_1( | ||
; CHECK-NEXT: [[D:%.*]] = udiv exact i8 [[X:%.*]], [[Y:%.*]] | ||
; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[D]], 1 | ||
; CHECK-NEXT: ret i1 [[R]] | ||
; | ||
%d = udiv exact i8 %x, %y | ||
%r = icmp ne i8 %d, 1 | ||
ret i1 %r | ||
} | ||
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define i1 @sdiv_exact_eq_9_no_of(i8 %x, i8 %y) { | ||
; CHECK-LABEL: @sdiv_exact_eq_9_no_of( | ||
; CHECK-NEXT: [[YY:%.*]] = and i8 [[Y:%.*]], 7 | ||
; CHECK-NEXT: [[D:%.*]] = sdiv exact i8 [[X:%.*]], [[YY]] | ||
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[D]], 9 | ||
; CHECK-NEXT: ret i1 [[R]] | ||
; | ||
%yy = and i8 %y, 7 | ||
%d = sdiv exact i8 %x, %yy | ||
%r = icmp eq i8 %d, 9 | ||
ret i1 %r | ||
} | ||
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define i1 @sdiv_exact_eq_9_may_of(i8 %x, i8 %y) { | ||
; CHECK-LABEL: @sdiv_exact_eq_9_may_of( | ||
; CHECK-NEXT: [[D:%.*]] = sdiv exact i8 [[X:%.*]], [[Y:%.*]] | ||
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[D]], 9 | ||
; CHECK-NEXT: ret i1 [[R]] | ||
; | ||
%d = sdiv exact i8 %x, %y | ||
%r = icmp eq i8 %d, 9 | ||
ret i1 %r | ||
} | ||
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define i1 @sdiv_exact_eq_9_no_of_fail_multiuse(i8 %x, i8 %y) { | ||
; CHECK-LABEL: @sdiv_exact_eq_9_no_of_fail_multiuse( | ||
; CHECK-NEXT: [[YY:%.*]] = and i8 [[Y:%.*]], 7 | ||
; CHECK-NEXT: [[D:%.*]] = sdiv exact i8 [[X:%.*]], [[YY]] | ||
; CHECK-NEXT: call void @use.i8(i8 [[D]]) | ||
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[D]], 9 | ||
; CHECK-NEXT: ret i1 [[R]] | ||
; | ||
%yy = and i8 %y, 7 | ||
%d = sdiv exact i8 %x, %yy | ||
call void @use.i8(i8 %d) | ||
%r = icmp eq i8 %d, 9 | ||
ret i1 %r | ||
} | ||
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define i1 @sdiv_exact_eq_9_must_of_todo_is_false(i8 %x, i8 %y) { | ||
; CHECK-LABEL: @sdiv_exact_eq_9_must_of_todo_is_false( | ||
; CHECK-NEXT: [[YY:%.*]] = or i8 [[Y:%.*]], 55 | ||
; CHECK-NEXT: [[D:%.*]] = sdiv exact i8 [[X:%.*]], [[YY]] | ||
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[D]], 9 | ||
; CHECK-NEXT: ret i1 [[R]] | ||
; | ||
%yy = or i8 %y, 55 | ||
%d = sdiv exact i8 %x, %yy | ||
%r = icmp eq i8 %d, 9 | ||
ret i1 %r | ||
} | ||
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define i1 @udiv_exact_ne_30_no_of(i8 %x, i8 %y) { | ||
; CHECK-LABEL: @udiv_exact_ne_30_no_of( | ||
; CHECK-NEXT: [[YY:%.*]] = and i8 [[Y:%.*]], 7 | ||
; CHECK-NEXT: [[D:%.*]] = udiv exact i8 [[X:%.*]], [[YY]] | ||
; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[D]], 30 | ||
; CHECK-NEXT: ret i1 [[R]] | ||
; | ||
%yy = and i8 %y, 7 | ||
%d = udiv exact i8 %x, %yy | ||
%r = icmp ne i8 %d, 30 | ||
ret i1 %r | ||
} |