mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 18:54:02 +01:00
c01a5baad9
This pass is like DeadCodeEliminationPass, but only does one pass through a function instead of iterating on users of eliminated instructions. DeadCodeEliminationPass should be used in all cases. Reviewed By: asbirlea Differential Revision: https://reviews.llvm.org/D87933
63 lines
1.4 KiB
LLVM
63 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -reassociate -dce -S | FileCheck %s
|
|
|
|
; (A&B)&~A == 0
|
|
define i32 @test1(i32 %a, i32 %b) {
|
|
; CHECK-LABEL: @test1(
|
|
; CHECK-NEXT: ret i32 0
|
|
;
|
|
%t2 = and i32 %b, %a
|
|
%t4 = xor i32 %a, -1
|
|
%t5 = and i32 %t2, %t4
|
|
ret i32 %t5
|
|
}
|
|
|
|
define <2 x i32> @not_op_vec_undef(<2 x i32> %a, <2 x i32> %b) {
|
|
; CHECK-LABEL: @not_op_vec_undef(
|
|
; CHECK-NEXT: ret <2 x i32> zeroinitializer
|
|
;
|
|
%t2 = and <2 x i32> %b, %a
|
|
%t4 = xor <2 x i32> %a, <i32 -1, i32 undef>
|
|
%t5 = and <2 x i32> %t2, %t4
|
|
ret <2 x i32> %t5
|
|
}
|
|
|
|
; A&~A == 0
|
|
define i32 @test2(i32 %a, i32 %b) {
|
|
; CHECK-LABEL: @test2(
|
|
; CHECK-NEXT: ret i32 0
|
|
;
|
|
%t1 = and i32 %a, 1234
|
|
%t2 = and i32 %b, %t1
|
|
%t4 = xor i32 %a, -1
|
|
%t5 = and i32 %t2, %t4
|
|
ret i32 %t5
|
|
}
|
|
|
|
; (b+(a+1234))+-a -> b+1234
|
|
define i32 @test3(i32 %b, i32 %a) {
|
|
; CHECK-LABEL: @test3(
|
|
; CHECK-NEXT: [[T5:%.*]] = add i32 [[B:%.*]], 1234
|
|
; CHECK-NEXT: ret i32 [[T5]]
|
|
;
|
|
%t1 = add i32 %a, 1234
|
|
%t2 = add i32 %b, %t1
|
|
%t4 = sub i32 0, %a
|
|
%t5 = add i32 %t2, %t4
|
|
ret i32 %t5
|
|
}
|
|
|
|
; (b+(a+1234))+~a -> b+1233
|
|
define i32 @test4(i32 %b, i32 %a) {
|
|
; CHECK-LABEL: @test4(
|
|
; CHECK-NEXT: [[T5:%.*]] = add i32 [[B:%.*]], 1233
|
|
; CHECK-NEXT: ret i32 [[T5]]
|
|
;
|
|
%t1 = add i32 %a, 1234
|
|
%t2 = add i32 %b, %t1
|
|
%t4 = xor i32 %a, -1
|
|
%t5 = add i32 %t2, %t4
|
|
ret i32 %t5
|
|
}
|
|
|