Hello,
I want to compile a LLVM file into an executable running on ARM platform.
I use LLVM 2.0 with the following command lines:
llvm-as -f -o test.bc test.ll
llc -march=arm -mcpu=arm1136j-s -mattr=+v6 -f -o test.s test.bc
arm-linux-gnu-as -mcpu=arm1136j-s test.s
With the last command, I obtain the following error:
rd and rm should be different in mul
The bad instruction is "mul r3, r3, r2" that follows the syntax
"mul rd, rm, rs".
I want to know where is my mistake or if it is a bug in register allocator ?
Thanks in advance.
Mikaël.
target 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"
@.str1 = internal constant [4 x i8] c"%d\0A\00"
declare i32 @printf(i8*, ...)
define i32 @main (){
entry:
%n = alloca i32
%f = alloca i32
%i = alloca i32
%zero = alloca i32
%inc = alloca i32
store i32 5, i32* %n
store i32 1, i32* %f
store i32 1, i32* %i
store i32 0 , i32* %zero
store i32 1 , i32* %inc
%tmp7 = load i32* %n
%tmp8 = load i32* %zero
%tmp6 = icmp sgt i32 %tmp7, %tmp8
br i1 %tmp6, label %then4, label %else12
then4:
%tmp14 = load i32* %i
%tmp16 = load i32* %n
%tmp18 = load i32* %inc
%tmp15 = add i32 %tmp16, %tmp18
%tmp13 = icmp slt i32 %tmp14, %tmp15
br i1 %tmp13, label %then11, label %else12
then11:
%tmp20 = load i32* %f
%tmp22 = alloca i32
store i32 1 , i32* %tmp22
%tmp23 = load i32* %tmp22
%tmp24 = load i32* %i
%tmp21 = add i32 %tmp24, %tmp23
store i32 %tmp21, i32* %i
%tmp19 = mul i32 %tmp20, %tmp21
store i32 %tmp19, i32* %f
br label %then4
else12:
%tmp25 = load i32* %f
%tmp335 = getelementptr [4 x i8]* @.str1, i32 0, i32 0
%tmp336 = call i32 (i8*, ...)* @printf( i8* %tmp335, i32 %tmp25 )
ret i32 %tmp25
}
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20070612/42b90134/attachment.html>
Hi Mikael, You are obtaining warning, not an error, right? The most arm cores, including arm1136, can execute mul with rd = rm. So, you can ignore this warning. Lauro 2007/6/12, Peltier, Mikael <m-peltier at ti.com>:> > > > > Hello, > > > > I want to compile a LLVM file into an executable running on ARM platform. > > I use LLVM 2.0 with the following command lines: > > llvm-as -f –o test.bc test.ll > > llc –march=arm –mcpu=arm1136j-s –mattr=+v6 –f –o test.s test.bc > > arm-linux-gnu-as –mcpu=arm1136j-s test.s > > > > With the last command, I obtain the following error: > > rd and rm should be different in mul > > > > The bad instruction is "mul r3, r3, r2" that follows the syntax "mul rd, rm, > rs". > > > > I want to know where is my mistake or if it is a bug in register allocator ? > > > > Thanks in advance. > > > > Mikaël. > > > > > > > > target 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" > > @.str1 = internal constant [4 x i8] c"%d\0A\00" > > > > declare i32 @printf(i8*, ...) > > > > define i32 @main (){ > > entry: > > %n = alloca i32 > > %f = alloca i32 > > %i = alloca i32 > > %zero = alloca i32 > > %inc = alloca i32 > > store i32 5, i32* %n > > store i32 1, i32* %f > > store i32 1, i32* %i > > store i32 0 , i32* %zero > > store i32 1 , i32* %inc > > > > %tmp7 = load i32* %n > > %tmp8 = load i32* %zero > > %tmp6 = icmp sgt i32 %tmp7, %tmp8 > > br i1 %tmp6, label %then4, label %else12 > > > > then4: > > %tmp14 = load i32* %i > > %tmp16 = load i32* %n > > %tmp18 = load i32* %inc > > %tmp15 = add i32 %tmp16, %tmp18 > > %tmp13 = icmp slt i32 %tmp14, %tmp15 > > br i1 %tmp13, label %then11, label %else12 > > > > then11: > > %tmp20 = load i32* %f > > %tmp22 = alloca i32 > > store i32 1 , i32* %tmp22 > > %tmp23 = load i32* %tmp22 > > %tmp24 = load i32* %i > > %tmp21 = add i32 %tmp24, %tmp23 > > store i32 %tmp21, i32* %i > > %tmp19 = mul i32 %tmp20, %tmp21 > > store i32 %tmp19, i32* %f > > br label %then4 > > > > else12: > > %tmp25 = load i32* %f > > %tmp335 = getelementptr [4 x i8]* @.str1, i32 0, i32 0 > > %tmp336 = call i32 (i8*, ...)* @printf( i8* %tmp335, i32 %tmp25 ) > > > ret i32 %tmp25 > > } > > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev > >
On Jun 12, 2007, at 4:55 AM, Peltier, Mikael wrote: I use LLVM 2.0 with the following command lines:> llvm-as -f –o test.bc test.ll > > llc –march=arm –mcpu=arm1136j-s –mattr=+v6 –f –o test.s test.bc > > arm-linux-gnu-as –mcpu=arm1136j-s test.s > > With the last command, I obtain the following error: > rd and rm should be different in mul > > The bad instruction is “mul r3, r3, r2” that follows the syntax > “mul rd, rm, rs”. > > I want to know where is my mistake or if it is a bug in register > allocator ?This instruction is valid on 1136j-s and other ARMv6 implementations. Since you have told the assembler that's what you have, it should not warn; this is an assembler bug. It is safe to ignore the message. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20070612/699c4f96/attachment.html>
you are right, I will ignore this warning. Thanks, Mikaël -----Original Message----- From: Lauro Ramos Venancio [mailto:lauro.venancio at gmail.com] Sent: mardi 12 juin 2007 16:19 To: LLVM Developers Mailing List; Peltier, Mikael Subject: Re: [LLVMdev] ARM backend problem ? Hi Mikael, You are obtaining warning, not an error, right? The most arm cores, including arm1136, can execute mul with rd = rm. So, you can ignore this warning. Lauro 2007/6/12, Peltier, Mikael <m-peltier at ti.com>:> > > > > Hello, > > > > I want to compile a LLVM file into an executable running on ARM platform. > > I use LLVM 2.0 with the following command lines: > > llvm-as -f -o test.bc test.ll > > llc -march=arm -mcpu=arm1136j-s -mattr=+v6 -f -o test.s test.bc > > arm-linux-gnu-as -mcpu=arm1136j-s test.s > > > > With the last command, I obtain the following error: > > rd and rm should be different in mul > > > > The bad instruction is "mul r3, r3, r2" that follows the syntax "mul rd, rm, > rs". > > > > I want to know where is my mistake or if it is a bug in register allocator ? > > > > Thanks in advance. > > > > Mikaël. > > > > > > > > target 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" > > @.str1 = internal constant [4 x i8] c"%d\0A\00" > > > > declare i32 @printf(i8*, ...) > > > > define i32 @main (){ > > entry: > > %n = alloca i32 > > %f = alloca i32 > > %i = alloca i32 > > %zero = alloca i32 > > %inc = alloca i32 > > store i32 5, i32* %n > > store i32 1, i32* %f > > store i32 1, i32* %i > > store i32 0 , i32* %zero > > store i32 1 , i32* %inc > > > > %tmp7 = load i32* %n > > %tmp8 = load i32* %zero > > %tmp6 = icmp sgt i32 %tmp7, %tmp8 > > br i1 %tmp6, label %then4, label %else12 > > > > then4: > > %tmp14 = load i32* %i > > %tmp16 = load i32* %n > > %tmp18 = load i32* %inc > > %tmp15 = add i32 %tmp16, %tmp18 > > %tmp13 = icmp slt i32 %tmp14, %tmp15 > > br i1 %tmp13, label %then11, label %else12 > > > > then11: > > %tmp20 = load i32* %f > > %tmp22 = alloca i32 > > store i32 1 , i32* %tmp22 > > %tmp23 = load i32* %tmp22 > > %tmp24 = load i32* %i > > %tmp21 = add i32 %tmp24, %tmp23 > > store i32 %tmp21, i32* %i > > %tmp19 = mul i32 %tmp20, %tmp21 > > store i32 %tmp19, i32* %f > > br label %then4 > > > > else12: > > %tmp25 = load i32* %f > > %tmp335 = getelementptr [4 x i8]* @.str1, i32 0, i32 0 > > %tmp336 = call i32 (i8*, ...)* @printf( i8* %tmp335, i32 %tmp25 ) > > > ret i32 %tmp25 > > } > > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev > >