llvm/test/CodeGen/ARM/mul_const.ll
Anton Korobeynikov 2d7ea04e28 Perform mul combine when multiplying wiht negative constants.
Patch by Weiming Zhao!
This fixes PR12212


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153049 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-19 19:19:50 +00:00

86 lines
1.5 KiB
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: lsl{{.*}}#12
%0 = mul i32 %v, 12288
ret i32 %0
}
define i32 @tn9(i32 %v) nounwind readnone {
entry:
; CHECK: tn9:
; CHECK: add r0, r0, r0, lsl #3
; CHECK: rsb r0, r0, #0
%0 = mul i32 %v, -9
ret i32 %0
}
define i32 @tn7(i32 %v) nounwind readnone {
entry:
; CHECK: tn7:
; CHECK: sub r0, r0, r0, lsl #3
%0 = mul i32 %v, -7
ret i32 %0
}
define i32 @tn5(i32 %v) nounwind readnone {
entry:
; CHECK: tn5:
; CHECK: add r0, r0, r0, lsl #2
; CHECK: rsb r0, r0, #0
%0 = mul i32 %v, -5
ret i32 %0
}
define i32 @tn3(i32 %v) nounwind readnone {
entry:
; CHECK: tn3:
; CHECK: sub r0, r0, r0, lsl #2
%0 = mul i32 %v, -3
ret i32 %0
}
define i32 @tn12288(i32 %v) nounwind readnone {
entry:
; CHECK: tn12288:
; CHECK: sub r0, r0, r0, lsl #2
; CHECK: lsl{{.*}}#12
%0 = mul i32 %v, -12288
ret i32 %0
}