test/Transforms/InstCombine/2008-01-21-MismatchedCastAndCompare.ll


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

; RUN: opt < %s -instcombine -S | FileCheck %s
; PR1940

define i1 @test1(i8 %A, i8 %B) {
        %a = zext i8 %A to i32
        %b = zext i8 %B to i32
        %c = icmp sgt i32 %a, %b
        ret i1 %c
; CHECK: %c = icmp ugt i8 %A, %B
; CHECK: ret i1 %c
}

define i1 @test2(i8 %A, i8 %B) {
        %a = sext i8 %A to i32
        %b = sext i8 %B to i32
        %c = icmp ugt i32 %a, %b
        ret i1 %c
; CHECK: %c = icmp ugt i8 %A, %B
; CHECK: ret i1 %c
}