1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s 3 4; Check that multiple instances of 64-bit constants encodable as 5; 32-bit immediates are merged for code size savings. 6 7; Immediates with multiple users should not be pulled into instructions when 8; optimizing for code size. 9define i1 @imm_multiple_users(i64 %a, i64* %b) optsize { 10; CHECK-LABEL: imm_multiple_users: 11; CHECK: # %bb.0: 12; CHECK-NEXT: movq $-1, %rax 13; CHECK-NEXT: movq %rax, (%rsi) 14; CHECK-NEXT: cmpq %rax, %rdi 15; CHECK-NEXT: sete %al 16; CHECK-NEXT: retq 17 store i64 -1, i64* %b, align 8 18 %cmp = icmp eq i64 %a, -1 19 ret i1 %cmp 20} 21 22declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) 23 24; Inlined memsets requiring multiple same-sized stores should be lowered using 25; the register, rather than immediate, form of stores when optimizing for 26; code size. 27define void @memset_zero(i8* noalias nocapture %D) optsize { 28; CHECK-LABEL: memset_zero: 29; CHECK: # %bb.0: 30; CHECK-NEXT: xorl %eax, %eax 31; CHECK-NEXT: movq %rax, 7(%rdi) 32; CHECK-NEXT: movq %rax, (%rdi) 33; CHECK-NEXT: retq 34 tail call void @llvm.memset.p0i8.i64(i8* %D, i8 0, i64 15, i1 false) 35 ret void 36} 37