search for: lsrs

...rective .syntax unified ^ /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:33:2: error: unknown use of instruction mnemonic without a size suffix mov r1, 1 ^ /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:2: error: invalid instruction mnemonic 'lsrs' lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 ^~~~ /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:19: error: invalid instruction mnemonic 'movne' lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 ^~~~~ /home/llvm_all/llvm/projects/compiler-rt/li...

I am currently trying to compile a pretty simple program to work on an experimental board. It contains an (FPGA-version of) an ARMv4 processor. So basically, I try this (on my Ubuntu 18.04.1 LTS): clang -v --target=arm-none-eabi -c barehello.c -o barehelloCLANG.o clang -v --target=arm-none-eabi -c io.c -o io.o clang -v --target=arm-none-eabi barehelloCLANG.o io.o -o helloCLANGstatic -static

...> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:33:2: error: unknown use of instruction mnemonic without a size suffix >> mov r1, 1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:2: error: invalid instruction mnemonic 'lsrs' >> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 >> ^~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:19: error: invalid instruction mnemonic 'movne' >> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 >> ^~~~~...

...> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:33:2: error: unknown use of instruction mnemonic without a size suffix >> mov r1, 1 >> ^ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:2: error: invalid instruction mnemonic 'lsrs' >> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 >> ^~~~ >> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:19: error: invalid instruction mnemonic 'movne' >> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 >> ^~~~~...

...gt; /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:33:2: error: unknown use of instruction mnemonic without a size suffix > > mov r1, 1 > > ^ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:2: error: invalid instruction mnemonic 'lsrs' > > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > > ^~~~ > > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:19: error: invalid instruction mnemonic 'movne' > > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > > ^~~~...

...ojects/compiler-rt/lib/builtins/arm/clzsi2.S:33:2: error: unknown use of instruction mnemonic without a size suffix > >>> mov r1, 1 > >>> ^ > >>> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:2: error: invalid instruction mnemonic 'lsrs' > >>> lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > >>> ^~~~ > >>> /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:19: error: invalid instruction mnemonic 'movne' > >>> lsrs r2, r0, 16; movne r0, r2; addeq r1,...

...ed > ^ > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:33:2: error: unknown use of instruction mnemonic without a size suffix > mov r1, 1 > ^ > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:2: error: invalid instruction mnemonic 'lsrs' > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > ^~~~ > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:19: error: invalid instruction mnemonic 'movne' > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > ^~~~~ > /home/llvm_all...

...ed > ^ > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:33:2: error: unknown use of instruction mnemonic without a size suffix > mov r1, 1 > ^ > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:2: error: invalid instruction mnemonic 'lsrs' > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > ^~~~ > /home/llvm_all/llvm/projects/compiler-rt/lib/builtins/arm/clzsi2.S:35:19: error: invalid instruction mnemonic 'movne' > lsrs r2, r0, 16; movne r0, r2; addeq r1, 16 > ^~~~~ > /home/llvm_all...

...loop I am working with it's disappointing to see that before each memory access, the base address is loaded into register, and then the offset is added, and then the access, which is 3 instructions. It should have been just an add/sub after the previous access before the memory access, per LSRs intentions. I wonder where this is supposed to be handled: In some sort of target pre-isel pass that chains the GEPs? Or is this just folded more often on other targets? /Jonas

...uld expand it to as more case as possible. The original issuse of it: For code as below: unsigned array[4]; unsigned foo(unsigned long x) { return array[(x>>2)&3ul]; sequence before this canonicalisation (ARM): foo: .fnstart @ BB#0: @ %entry lsrs r0, r0, #2 movs r1, #3 ands r1, r0 lsls r0, r1, #2 ldr r1, .LCPI0_0 ldr r0, [r1, r0] bx lr .p2align 2 sequence after this canonicalisation: foo: .fnstart @ BB#0: @ %entry movs r1, #12 ands r1, r0 ldr r0, .LCPI0_0 ldr r0, [r0, r1] bx lr .p2align 2 This canonicalisa...

Hi, I find that LSR is not helping enough on avoiding unfoldable offsets for SystemZ. When the loop has three stores with unfoldable offsets, LSR rewrites the IV in a good way. However, if adding another store with a foldable offset that fits already, LSR fails to rewrite the three stores. And if I happen to add a too big *positive* offset (the first three were negative) instead of a