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
diff --git a/test/CodeGen/ARM/mul_const.ll b/test/CodeGen/ARM/mul_const.ll
index 93188cd..8c10246 100644
--- a/test/CodeGen/ARM/mul_const.ll
+++ b/test/CodeGen/ARM/mul_const.ll
@@ -1,17 +1,43 @@
; RUN: llc < %s -march=arm | FileCheck %s
-define i32 @t1(i32 %v) nounwind readnone {
+define i32 @t9(i32 %v) nounwind readnone {
entry:
-; CHECK: t1:
+; CHECK: t9:
; CHECK: add r0, r0, r0, lsl #3
%0 = mul i32 %v, 9
ret i32 %0
}
-define i32 @t2(i32 %v) nounwind readnone {
+define i32 @t7(i32 %v) nounwind readnone {
entry:
-; CHECK: t2:
+; 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
+}
+