llvm-6502/test/CodeGen/ARM/mul_const.ll
Anton Korobeynikov a9790d739a Some cheap DAG combine goodness for multiplication with a particular constant.
This can be extended later on to handle more "complex" constants.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103881 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-15 18:16:59 +00:00

44 lines
780 B
LLVM

; RUN: llc < %s -march=arm | FileCheck %s
define i32 @t9(i32 %v) nounwind readnone {
entry:
; CHECK: t9:
; CHECK: add r0, r0, r0, lsl #3
%0 = mul i32 %v, 9
ret i32 %0
}
define i32 @t7(i32 %v) nounwind readnone {
entry:
; CHECK: t7:
; CHECK: rsb r0, r0, r0, lsl #3
%0 = mul i32 %v, 7
ret i32 %0
}
define i32 @t5(i32 %v) nounwind readnone {
entry:
; CHECK: t5:
; CHECK: add r0, r0, r0, lsl #2
%0 = mul i32 %v, 5
ret i32 %0
}
define i32 @t3(i32 %v) nounwind readnone {
entry:
; CHECK: t3:
; CHECK: add r0, r0, r0, lsl #1
%0 = mul i32 %v, 3
ret i32 %0
}
define i32 @t12288(i32 %v) nounwind readnone {
entry:
; CHECK: t12288:
; CHECK: add r0, r0, r0, lsl #1
; CHECK: mov r0, r0, lsl #12
%0 = mul i32 %v, 12288
ret i32 %0
}