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[InstCombine] update test file to use FileCheck; NFC

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llvm-svn: 302585
This commit is contained in:
Sanjay Patel 2017-05-09 20:46:12 +00:00
parent a088f2fbcc
commit 608cde04ab
1 changed files with 22 additions and 14 deletions
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36
llvm/test/Transforms/InstCombine/bit-tracking.ll
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@ -1,26 +1,34 @@
; RUN: opt < %s -instcombine -S | FileCheck %s
; This file contains various testcases that require tracking whether bits are
; set or cleared by various instructions.
; RUN: opt < %s -instcombine -instcombine -S |\
; RUN: not grep %ELIM
; Reduce down to a single XOR
define i32 @test3(i32 %B) {
%ELIMinc = and i32 %B, 1 ; <i32> [#uses=1]
%tmp.5 = xor i32 %ELIMinc, 1 ; <i32> [#uses=1]
%ELIM7 = and i32 %B, -2 ; <i32> [#uses=1]
%tmp.8 = or i32 %tmp.5, %ELIM7 ; <i32> [#uses=1]
ret i32 %tmp.8
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[TMP_8:%.*]] = xor i32 %B, 1
; CHECK-NEXT: ret i32 [[TMP_8]]
;
%ELIMinc = and i32 %B, 1
%tmp.5 = xor i32 %ELIMinc, 1
%ELIM7 = and i32 %B, -2
%tmp.8 = or i32 %tmp.5, %ELIM7
ret i32 %tmp.8
}
; Finally, a bigger case where we chain things together. This corresponds to
; incrementing a single-bit bitfield, which should become just an xor.
define i32 @test4(i32 %B) {
%ELIM3 = shl i32 %B, 31 ; <i32> [#uses=1]
%ELIM4 = ashr i32 %ELIM3, 31 ; <i32> [#uses=1]
%inc = add i32 %ELIM4, 1 ; <i32> [#uses=1]
%ELIM5 = and i32 %inc, 1 ; <i32> [#uses=1]
%ELIM7 = and i32 %B, -2 ; <i32> [#uses=1]
%tmp.8 = or i32 %ELIM5, %ELIM7 ; <i32> [#uses=1]
ret i32 %tmp.8
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[TMP_8:%.*]] = xor i32 %B, 1
; CHECK-NEXT: ret i32 [[TMP_8]]
;
%ELIM3 = shl i32 %B, 31
%ELIM4 = ashr i32 %ELIM3, 31
%inc = add i32 %ELIM4, 1
%ELIM5 = and i32 %inc, 1
%ELIM7 = and i32 %B, -2
%tmp.8 = or i32 %ELIM5, %ELIM7
ret i32 %tmp.8
}