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[InstCombine] auto-generate checks 

llvm-svn: 284244
This commit is contained in:
Sanjay Patel 2016-10-14 15:41:25 +00:00
parent 0b611dcabf
commit a3bc38b36d
1 changed files with 24 additions and 22 deletions
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46
llvm/test/Transforms/InstCombine/sub-xor.ll
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@ -1,47 +1,49 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -instcombine -S < %s | FileCheck %s
define i32 @test1(i32 %x) nounwind {
define i32 @test1(i32 %x) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 31
; CHECK-NEXT: [[SUB:%.*]] = xor i32 [[AND]], 63
; CHECK-NEXT: ret i32 [[SUB]]
;
%and = and i32 %x, 31
%sub = sub i32 63, %and
ret i32 %sub
; CHECK-LABEL: @test1(
; CHECK-NEXT: and i32 %x, 31
; CHECK-NEXT: xor i32 %and, 63
; CHECK-NEXT: ret
}
declare i32 @llvm.ctlz.i32(i32, i1) nounwind readnone
define i32 @test2(i32 %x) nounwind {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[COUNT:%.*]] = tail call i32 @llvm.ctlz.i32(i32 %x, i1 true) #0
; CHECK-NEXT: [[SUB:%.*]] = xor i32 [[COUNT]], 31
; CHECK-NEXT: ret i32 [[SUB]]
;
%count = tail call i32 @llvm.ctlz.i32(i32 %x, i1 true) nounwind readnone
%sub = sub i32 31, %count
ret i32 %sub
; CHECK-LABEL: @test2(
; CHECK-NEXT: ctlz
; CHECK-NEXT: xor i32 %count, 31
; CHECK-NEXT: ret
}
define i32 @test3(i32 %x) nounwind {
define i32 @test3(i32 %x) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 31
; CHECK-NEXT: [[ADD:%.*]] = sub nsw i32 73, [[AND]]
; CHECK-NEXT: ret i32 [[ADD]]
;
%and = and i32 %x, 31
%sub = xor i32 31, %and
%add = add i32 %sub, 42
ret i32 %add
; CHECK-LABEL: @test3(
; CHECK-NEXT: and i32 %x, 31
; CHECK-NEXT: sub nsw i32 73, %and
; CHECK-NEXT: ret
}
define i32 @test4(i32 %x) nounwind {
define i32 @test4(i32 %x) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[ADD:%.*]] = add i32 %x, -2147483606
; CHECK-NEXT: ret i32 [[ADD]]
;
%sub = xor i32 %x, 2147483648
%add = add i32 %sub, 42
ret i32 %add
; CHECK-LABEL: @test4(
; CHECK-NEXT: add i32 %x, -2147483606
; CHECK-NEXT: ret
}