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[InstCombine] Add nonnull(select c, null, p) tests (NFC)

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Juneyoung Lee 2021-02-14 22:03:15 +09:00
parent ed253ef772
commit 2c5c7d5feb
1 changed files with 41 additions and 0 deletions
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41
llvm/test/Transforms/InstCombine/nonnull-select.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
; Passing select(cond, null, v) as nonnull should be optimized to passing v
define nonnull i32* @pr48975(i32** %.0) {
; CHECK-LABEL: @pr48975(
; CHECK-NEXT: [[DOT1:%.*]] = load i32*, i32** [[DOT0:%.*]], align 8
; CHECK-NEXT: [[DOT2:%.*]] = icmp eq i32* [[DOT1]], null
; CHECK-NEXT: [[DOT3:%.*]] = bitcast i32** [[DOT0]] to i32*
; CHECK-NEXT: [[DOT4:%.*]] = select i1 [[DOT2]], i32* null, i32* [[DOT3]]
; CHECK-NEXT: ret i32* [[DOT4]]
;
%.1 = load i32*, i32** %.0, align 8
%.2 = icmp eq i32* %.1, null
%.3 = bitcast i32** %.0 to i32*
%.4 = select i1 %.2, i32* null, i32* %.3
ret i32* %.4
}
define nonnull i32* @nonnull_ret(i1 %cond, i32* %p) {
; CHECK-LABEL: @nonnull_ret(
; CHECK-NEXT: [[RES:%.*]] = select i1 [[COND:%.*]], i32* [[P:%.*]], i32* null
; CHECK-NEXT: ret i32* [[RES]]
;
%res = select i1 %cond, i32* %p, i32* null
ret i32* %res
}
define void @nonnull_call(i1 %cond, i32* %p) {
; CHECK-LABEL: @nonnull_call(
; CHECK-NEXT: [[RES:%.*]] = select i1 [[COND:%.*]], i32* null, i32* [[P:%.*]]
; CHECK-NEXT: call void @f(i32* nonnull [[RES]])
; CHECK-NEXT: ret void
;
%res = select i1 %cond, i32* null, i32* %p
call void @f(i32* nonnull %res)
ret void
}
declare void @f(i32*)