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[NFC][InstCombine] onehot_merge.ll: add last few tests in the state they regress to in D62818 

llvm-svn: 365056
This commit is contained in:
Roman Lebedev 2019-07-03 16:48:53 +00:00
parent c1c86adb16
commit 826db453d1
1 changed files with 39 additions and 0 deletions
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39
llvm/test/Transforms/InstCombine/onehot_merge.ll
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@ -148,3 +148,42 @@ define i1 @foo1_or_signbit_lshr(i32 %k, i32 %c1, i32 %c2) {
%or = and i1 %t2, %t6
ret i1 %or
}
; Same as last two, but shift-of-signbit replaced with 'icmp s*'
define i1 @foo1_and_signbit_lshr_without_shifting_signbit(i32 %k, i32 %c1, i32 %c2) {
; CHECK-LABEL: @foo1_and_signbit_lshr_without_shifting_signbit(
; CHECK-NEXT: [[T0:%.*]] = shl i32 1, [[C1:%.*]]
; CHECK-NEXT: [[T1:%.*]] = and i32 [[T0]], [[K:%.*]]
; CHECK-NEXT: [[T2:%.*]] = icmp eq i32 [[T1]], 0
; CHECK-NEXT: [[T3:%.*]] = shl i32 [[K]], [[C2:%.*]]
; CHECK-NEXT: [[T4:%.*]] = icmp sgt i32 [[T3]], -1
; CHECK-NEXT: [[OR:%.*]] = or i1 [[T2]], [[T4]]
; CHECK-NEXT: ret i1 [[OR]]
;
%t0 = shl i32 1, %c1
%t1 = and i32 %t0, %k
%t2 = icmp eq i32 %t1, 0
%t3 = shl i32 %k, %c2
%t4 = icmp sgt i32 %t3, -1
%or = or i1 %t2, %t4
ret i1 %or
}
define i1 @foo1_or_signbit_lshr_without_shifting_signbit(i32 %k, i32 %c1, i32 %c2) {
; CHECK-LABEL: @foo1_or_signbit_lshr_without_shifting_signbit(
; CHECK-NEXT: [[T0:%.*]] = shl i32 1, [[C1:%.*]]
; CHECK-NEXT: [[T1:%.*]] = and i32 [[T0]], [[K:%.*]]
; CHECK-NEXT: [[T2:%.*]] = icmp ne i32 [[T1]], 0
; CHECK-NEXT: [[T3:%.*]] = shl i32 [[K]], [[C2:%.*]]
; CHECK-NEXT: [[T4:%.*]] = icmp slt i32 [[T3]], 0
; CHECK-NEXT: [[OR:%.*]] = and i1 [[T2]], [[T4]]
; CHECK-NEXT: ret i1 [[OR]]
;
%t0 = shl i32 1, %c1
%t1 = and i32 %t0, %k
%t2 = icmp ne i32 %t1, 0
%t3 = shl i32 %k, %c2
%t4 = icmp slt i32 %t3, 0
%or = and i1 %t2, %t4
ret i1 %or
}