1 ; RUN: llc -asm-verbose=false -march=x86-64 -mtriple=x86_64-apple-darwin -o - < %s | FileCheck %s 2 3 ; LSR should leave non-affine expressions alone because it currently 4 ; doesn't know how to do anything with them, and when it tries, it 5 ; gets SCEVExpander's current expansion for them, which is suboptimal. 6 7 ; CHECK: xorl %eax, %eax 8 ; CHECK-NEXT: align 9 ; CHECK-NEXT: BB0_1: 10 ; CHECK-NEXT: movq %rax, (%rdx) 11 ; CHECK-NEXT: addq %rsi, %rax 12 ; CHECK-NEXT: cmpq %rdi, %rax 13 ; CHECK-NEXT: jl 14 ; CHECK-NEXT: imulq %rax, %rax 15 ; CHECK-NEXT: ret 16 define i64 @foo(i64 %n, i64 %s, i64* %p) nounwind { 17 entry: 18 br label %loop 19 20 loop: 21 %i = phi i64 [ 0, %entry ], [ %i.next, %loop ] 22 store volatile i64 %i, i64* %p 23 %i.next = add i64 %i, %s 24 %c = icmp slt i64 %i.next, %n 25 br i1 %c, label %loop, label %exit 26 27 exit: 28 %mul = mul i64 %i.next, %i.next 29 ret i64 %mul 30 } 31
