1; RUN: llc %s -o - -O0 -regalloc=fast | FileCheck %s 2target datalayout = "e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128" 3target triple = "i386-apple-macosx10.10" 4 5@c = external global i8, align 1 6@p = thread_local global i8* null, align 4 7 8; Check that regalloc fast correctly preserves EAX that is set by the TLS call 9; until the actual use. 10; PR26485. 11; 12; CHECK-LABEL: f: 13; Get c. 14; C is spilled because of the scheduling of the instructions, 15; but a smarter regalloc wouldn't have spilled it. 16; CHECK: movl L_c{{[^,]*}}, [[C_ADDR:%[a-z]+]] 17; CHECK-NEXT: movl [[C_ADDR]], [[C_SPILLED:[0-8]+\(%esp\)]] 18; Get p. 19; CHECK-NEXT: movl _p@{{[0-9a-zA-Z]+}}, [[P_ADDR:%[a-z]+]] 20; CHECK-NEXT: calll *([[P_ADDR]]) 21; At this point eax contiains the address of p. 22; Load c address. 23; Make sure we do not clobber eax. 24; CHECK-NEXT: movl [[C_SPILLED]], [[C_ADDR_RELOADED:%e[b-z]x+]] 25; Store c address into p. 26; CHECK-NEXT: movl [[C_ADDR_RELOADED]], (%eax) 27define void @f() #0 { 28entry: 29 store i8* @c, i8** @p, align 4 30 ret void 31} 32