1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2 ; RUN: llc < %s -mtriple=i686-unknown-linux -enable-misched=false | FileCheck %s 3 4 ;; Simple case 5 define i32 @test1(i8 %x) nounwind readnone { 6 ; CHECK-LABEL: test1: 7 ; CHECK: # %bb.0: 8 ; CHECK-NEXT: movzbl {{[0-9]+}}(%esp), %eax 9 ; CHECK-NEXT: andl $-32, %eax 10 ; CHECK-NEXT: retl 11 %A = and i8 %x, -32 12 %B = zext i8 %A to i32 13 ret i32 %B 14 } 15 16 ;; Multiple uses of %x but easily extensible. 17 define i32 @test2(i8 %x) nounwind readnone { 18 ; CHECK-LABEL: test2: 19 ; CHECK: # %bb.0: 20 ; CHECK-NEXT: movzbl {{[0-9]+}}(%esp), %eax 21 ; CHECK-NEXT: movl %eax, %ecx 22 ; CHECK-NEXT: andl $-32, %ecx 23 ; CHECK-NEXT: orl $63, %eax 24 ; CHECK-NEXT: addl %ecx, %eax 25 ; CHECK-NEXT: retl 26 %A = and i8 %x, -32 27 %B = zext i8 %A to i32 28 %C = or i8 %x, 63 29 %D = zext i8 %C to i32 30 %E = add i32 %B, %D 31 ret i32 %E 32 } 33 34 declare void @use(i32, i8) 35 36 ;; Multiple uses of %x where we shouldn't extend the load. 37 define void @test3(i8 %x) nounwind readnone { 38 ; CHECK-LABEL: test3: 39 ; CHECK: # %bb.0: 40 ; CHECK-NEXT: subl $12, %esp 41 ; CHECK-NEXT: movzbl {{[0-9]+}}(%esp), %eax 42 ; CHECK-NEXT: subl $8, %esp 43 ; CHECK-NEXT: pushl %eax 44 ; CHECK-NEXT: andl $-32, %eax 45 ; CHECK-NEXT: pushl %eax 46 ; CHECK-NEXT: calll use 47 ; CHECK-NEXT: addl $28, %esp 48 ; CHECK-NEXT: retl 49 %A = and i8 %x, -32 50 %B = zext i8 %A to i32 51 call void @use(i32 %B, i8 %x) 52 ret void 53 } 54 55
