forked from OSchip/llvm-project
55 lines
1.4 KiB
LLVM
55 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc < %s -mtriple=i686-unknown-linux -enable-misched=false | FileCheck %s
|
|
|
|
;; Simple case
|
|
define i32 @test1(i8 %x) nounwind readnone {
|
|
; CHECK-LABEL: test1:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: movzbl {{[0-9]+}}(%esp), %eax
|
|
; CHECK-NEXT: andl $-32, %eax
|
|
; CHECK-NEXT: retl
|
|
%A = and i8 %x, -32
|
|
%B = zext i8 %A to i32
|
|
ret i32 %B
|
|
}
|
|
|
|
;; Multiple uses of %x but easily extensible.
|
|
define i32 @test2(i8 %x) nounwind readnone {
|
|
; CHECK-LABEL: test2:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: movzbl {{[0-9]+}}(%esp), %eax
|
|
; CHECK-NEXT: movl %eax, %ecx
|
|
; CHECK-NEXT: andl $-32, %ecx
|
|
; CHECK-NEXT: orl $63, %eax
|
|
; CHECK-NEXT: addl %ecx, %eax
|
|
; CHECK-NEXT: retl
|
|
%A = and i8 %x, -32
|
|
%B = zext i8 %A to i32
|
|
%C = or i8 %x, 63
|
|
%D = zext i8 %C to i32
|
|
%E = add i32 %B, %D
|
|
ret i32 %E
|
|
}
|
|
|
|
declare void @use(i32, i8)
|
|
|
|
;; Multiple uses of %x where we shouldn't extend the load.
|
|
define void @test3(i8 %x) nounwind readnone {
|
|
; CHECK-LABEL: test3:
|
|
; CHECK: # %bb.0:
|
|
; CHECK-NEXT: subl $12, %esp
|
|
; CHECK-NEXT: movzbl {{[0-9]+}}(%esp), %eax
|
|
; CHECK-NEXT: subl $8, %esp
|
|
; CHECK-NEXT: pushl %eax
|
|
; CHECK-NEXT: andl $-32, %eax
|
|
; CHECK-NEXT: pushl %eax
|
|
; CHECK-NEXT: calll use@PLT
|
|
; CHECK-NEXT: addl $28, %esp
|
|
; CHECK-NEXT: retl
|
|
%A = and i8 %x, -32
|
|
%B = zext i8 %A to i32
|
|
call void @use(i32 %B, i8 %x)
|
|
ret void
|
|
}
|
|
|