maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[InstCombine] update test to use FileCheck and auto-generate checks; NFC 

llvm-svn: 288261
This commit is contained in:
Sanjay Patel 2016-11-30 18:49:56 +00:00
parent 7b75e3266c
commit c41d0c8a9b
1 changed files with 15 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
llvm/test/Transforms/InstCombine/narrow.ll
View File

@ -1,18 +1,19 @@
; This file contains various testcases that check to see that instcombine
; is narrowing computations when possible.
; RUN: opt < %s -instcombine -S | \
; RUN: grep "ret i1 false"
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
; Eliminating the casts in this testcase (by narrowing the AND operation)
; allows instcombine to realize the function always returns false.
; test1 - Eliminating the casts in this testcase (by narrowing the AND
; operation) allows instcombine to realize the function always returns false.
;
define i1 @test1(i32 %A, i32 %B) {
%C1 = icmp slt i32 %A, %B ; <i1> [#uses=1]
%ELIM1 = zext i1 %C1 to i32 ; <i32> [#uses=1]
%C2 = icmp sgt i32 %A, %B ; <i1> [#uses=1]
%ELIM2 = zext i1 %C2 to i32 ; <i32> [#uses=1]
%C3 = and i32 %ELIM1, %ELIM2 ; <i32> [#uses=1]
%ELIM3 = trunc i32 %C3 to i1 ; <i1> [#uses=1]
ret i1 %ELIM3
; CHECK-LABEL: @test1(
; CHECK-NEXT: ret i1 false
;
%C1 = icmp slt i32 %A, %B
%ELIM1 = zext i1 %C1 to i32
%C2 = icmp sgt i32 %A, %B
%ELIM2 = zext i1 %C2 to i32
%C3 = and i32 %ELIM1, %ELIM2
%ELIM3 = trunc i32 %C3 to i1
ret i1 %ELIM3
}