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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -nary-reassociate -S | FileCheck %s
; RUN: opt < %s -passes='nary-reassociate' -S | FileCheck %s
define i32 @foo(i32 %t4) {
; CHECK-LABEL: @foo(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[T13:%.*]] = add i32 [[T4:%.*]], -128
; CHECK-NEXT: [[T14:%.*]] = add i32 [[T13]], 8
; CHECK-NEXT: [[T23:%.*]] = add i32 [[T13]], 119
; CHECK-NEXT: ret i32 [[T23]]
;
entry:
%t5 = add i32 %t4, 8
%t13 = add i32 %t4, -128 ; deleted
%t14 = add i32 %t13, 8 ; => %t5 + -128
%t21 = add i32 119, %t4
; do not rewrite %t23 against %t13 because %t13 is already deleted
%t23 = add i32 %t21, -128
ret i32 %t23
}
; This is essentially the same test as the previous one but intermidiate result (t14) has a use.
define i32 @foo2(i32 %t4) {
; CHECK-LABEL: @foo2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[T13:%.*]] = add i32 [[T4:%.*]], -128
; CHECK-NEXT: [[T14:%.*]] = add i32 [[T13]], 8
; CHECK-NEXT: [[T23:%.*]] = add i32 [[T13]], 119
; CHECK-NEXT: [[RES:%.*]] = add i32 [[T14]], [[T23]]
; CHECK-NEXT: ret i32 [[RES]]
;
entry:
%t5 = add i32 %t4, 8 ; initially dead
%t13 = add i32 %t4, -128
%t14 = add i32 %t13, 8
%t21 = add i32 119, %t4 ; => dead after reassociation
%t23 = add i32 %t21, -128; => reassociated to t13 + 119
%res = add i32 %t14, %t23
ret i32 %res
}
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