Implement LSR instructions for the integrated ARM assembler.

tests_lit/assembler/arm32/lsr.ll

-; Show that we know how to translate lsl.
+; Show that we know how to translate lsr.
 
 ; NOTE: We use -O2 to get rid of memory stores.
 
 ; REQUIRES: allow_dump
 
 ; Compile using standalone assembler.
 ; RUN: %p2i --filetype=asm -i %s --target=arm32 --args -O2 \
 ; RUN:   | FileCheck %s --check-prefix=ASM
 
 ; Show bytes in assembled standalone code.
 ; RUN: %p2i --filetype=asm -i %s --target=arm32 --assemble --disassemble \
 ; RUN:   --args -O2 | FileCheck %s --check-prefix=DIS
 
 ; Compile using integrated assembler.
 ; RUN: %p2i --filetype=iasm -i %s --target=arm32 --args -O2 \
 ; RUN:   | FileCheck %s --check-prefix=IASM
 
 ; Show bytes in assembled integrated code.
 ; RUN: %p2i --filetype=iasm -i %s --target=arm32 --assemble --disassemble \
 ; RUN:   --args -O2 | FileCheck %s --check-prefix=DIS
 
-define internal i32 @ShlAmt(i32 %a) {
-; ASM-LABEL:ShlAmt:
-; DIS-LABEL:00000000 <ShlAmt>:
-; IASM-LABEL:ShlAmt:
+define internal i32 @LshrAmt(i32 %a) {
+; ASM-LABEL:LshrAmt:
+; DIS-LABEL:00000000 <LshrAmt>:
+; IASM-LABEL:LshrAmt:
 
 entry:
-; ASM-NEXT:.LShlAmt$entry:
-; IASM-NEXT:.LShlAmt$entry:
+; ASM-NEXT:.LLshrAmt$entry:
+; IASM-NEXT:.LLshrAmt$entry:
 
-  %shl = shl i32 %a, 23
+  %shl = lshr i32 %a, 23

[Jim Stichnoth, 2015/12/04 23:39:12]

Maybe you want to rename this var?

[Karl, 2015/12/07 18:44:00]

Done.

 
-; ASM-NEXT:     lsl     r0, r0, #23
-; DIS-NEXT:   0:        e1a00b80
-; IASM-NEXT:    .byte 0x80
+; ASM-NEXT:     lsr     r0, r0, #23
+; DIS-NEXT:   0:        e1a00ba0
+; IASM-NEXT:    .byte 0xa0
 ; IASM-NEXT:    .byte 0xb
 ; IASM-NEXT:    .byte 0xa0
 ; IASM-NEXT:    .byte 0xe1
 
   ret i32 %shl
 }
 
-define internal i32 @ShlReg(i32 %a, i32 %b) {
-; ASM-LABEL:ShlReg:
-; DIS-LABEL:00000010 <ShlReg>:
-; IASM-LABEL:ShlReg:
+define internal i32 @LshrReg(i32 %a, i32 %b) {
+; ASM-LABEL:LshrReg:
+; DIS-LABEL:00000010 <LshrReg>:
+; IASM-LABEL:LshrReg:
 
 entry:
-; ASM-NEXT:.LShlReg$entry:
-; IASM-NEXT:.LShlReg$entry:
+; ASM-NEXT:.LLshrReg$entry:
+; IASM-NEXT:.LLshrReg$entry:
 
-  %shl = shl i32 %a, %b
+  %shl = lshr i32 %a, %b
 
-; ASM-NEXT:     lsl     r0, r0, r1
-; DIS-NEXT:  10:        e1a00110
-; IASM-NEXT:    .byte 0x10
+; ASM-NEXT:     lsr     r0, r0, r1
+; DIS-NEXT:  10:        e1a00130
+; IASM-NEXT:    .byte 0x30
 ; IASM-NEXT:    .byte 0x1
 ; IASM-NEXT:    .byte 0xa0
 ; IASM-NEXT:    .byte 0xe1
 
   ret i32 %shl
 }