xref: /aosp_15_r20/external/llvm/test/CodeGen/X86/2011-03-09-Physreg-Coalescing.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)
1*9880d681SAndroid Build Coastguard Worker; RUN: llc -mcpu=yonah < %s
2*9880d681SAndroid Build Coastguard Worker; PR9438
3*9880d681SAndroid Build Coastguard Workertarget datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
4*9880d681SAndroid Build Coastguard Workertarget triple = "i386-unknown-freebsd9.0"
5*9880d681SAndroid Build Coastguard Worker
6*9880d681SAndroid Build Coastguard Worker; The 'call fastcc' ties down %ebx, %ecx, and %edx.
7*9880d681SAndroid Build Coastguard Worker; A MUL8r ties down %al, leaving no GR32_ABCD registers available.
8*9880d681SAndroid Build Coastguard Worker; The coalescer can easily overallocate physical registers,
9*9880d681SAndroid Build Coastguard Worker; and register allocation fails.
10*9880d681SAndroid Build Coastguard Worker
11*9880d681SAndroid Build Coastguard Workerdeclare fastcc i8* @save_string(i8* %d, i8* nocapture %s) nounwind
12*9880d681SAndroid Build Coastguard Worker
13*9880d681SAndroid Build Coastguard Workerdefine i32 @cvtchar(i8* nocapture %sp) nounwind {
14*9880d681SAndroid Build Coastguard Worker  %temp.i = alloca [2 x i8], align 1
15*9880d681SAndroid Build Coastguard Worker  %tmp1 = load i8, i8* %sp, align 1
16*9880d681SAndroid Build Coastguard Worker  %div = udiv i8 %tmp1, 10
17*9880d681SAndroid Build Coastguard Worker  %rem = urem i8 %div, 10
18*9880d681SAndroid Build Coastguard Worker  %arrayidx.i = getelementptr inbounds [2 x i8], [2 x i8]* %temp.i, i32 0, i32 0
19*9880d681SAndroid Build Coastguard Worker  store i8 %rem, i8* %arrayidx.i, align 1
20*9880d681SAndroid Build Coastguard Worker  %call.i = call fastcc i8* @save_string(i8* %sp, i8* %arrayidx.i) nounwind
21*9880d681SAndroid Build Coastguard Worker  ret i32 undef
22*9880d681SAndroid Build Coastguard Worker}
23