52 lines · plain
1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc %s -O2 -mtriple=i686-unknown-linux-gnu -o - | FileCheck %s3 4@f = global ptr zeroinitializer5 6; PR39391 - The load of %v1 should be scheduled before the zeroing of the A-D registers.7 8define void @g() #0 {9; CHECK-LABEL: g:10; CHECK: # %bb.0: # %entry11; CHECK-NEXT: pushl %ebp12; CHECK-NEXT: .cfi_def_cfa_offset 813; CHECK-NEXT: .cfi_offset %ebp, -814; CHECK-NEXT: movl %esp, %ebp15; CHECK-NEXT: .cfi_def_cfa_register %ebp16; CHECK-NEXT: pushl %ebx17; CHECK-NEXT: pushl %esi18; CHECK-NEXT: subl $16, %esp19; CHECK-NEXT: .cfi_offset %esi, -1620; CHECK-NEXT: .cfi_offset %ebx, -1221; CHECK-NEXT: movl f, %esi22; CHECK-NEXT: movzbl (%esi), %eax23; CHECK-NEXT: movb %al, {{[-0-9]+}}(%e{{[sb]}}p) # 1-byte Spill24; CHECK-NEXT: xorl %eax, %eax25; CHECK-NEXT: xorl %edx, %edx26; CHECK-NEXT: xorl %ecx, %ecx27; CHECK-NEXT: xorl %ebx, %ebx28; CHECK-NEXT: lock cmpxchg8b (%esi)29; CHECK-NEXT: cmpb $0, {{[-0-9]+}}(%e{{[sb]}}p) # 1-byte Folded Reload30; CHECK-NEXT: je .LBB0_231; CHECK-NEXT: # %bb.1: # %.32; CHECK-NEXT: calll m@PLT33; CHECK-NEXT: .LBB0_2: # %k.end34entry:35 %p = load ptr, ptr @f36 %v1 = load atomic i8, ptr %p monotonic, align 137 %v2 = load atomic i64, ptr %p monotonic, align 838 %j.h = icmp eq i8 %v1, 039 br i1 %j.h, label %k.end, label %.40 41.: ; preds = %entry42 %v3 = call i32 @m()43 unreachable44 45k.end: ; preds = %entry46 unreachable47}48 49declare i32 @m()50 51attributes #0 = { noimplicitfloat "frame-pointer"="non-leaf" }52