From 2d7ea04e2822bbe5faad0eefceb7a300ea01224e Mon Sep 17 00:00:00 2001 From: Anton Korobeynikov Date: Mon, 19 Mar 2012 19:19:50 +0000 Subject: 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 --- test/CodeGen/ARM/mul_const.ll | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) (limited to 'test/CodeGen/ARM') diff --git a/test/CodeGen/ARM/mul_const.ll b/test/CodeGen/ARM/mul_const.ll index 3cb8a8e816..c50a233546 100644 --- a/test/CodeGen/ARM/mul_const.ll +++ b/test/CodeGen/ARM/mul_const.ll @@ -41,3 +41,45 @@ entry: 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 +} -- cgit v1.2.3-70-g09d2