llvm-6502/test/CodeGen/ARM/smulw.ll

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; RUN: llc -mtriple=arm--none-eabi -mcpu=cortex-a8 %s -o - | FileCheck %s
; RUN: llc -mtriple=thumb--none-eabi -mcpu=cortex-a8 %s -o - | FileCheck %s
; We cannot codegen the smulw[bt] or smlaw[bt] instructions for these functions,
; as the top 16 bits of the result would differ
define i32 @f1(i32 %a, i16 %b) {
; CHECK-LABEL: f1:
; CHECK: mul
; CHECK: asr
%tmp1 = sext i16 %b to i32
%tmp2 = mul i32 %a, %tmp1
%tmp3 = ashr i32 %tmp2, 16
ret i32 %tmp3
}
define i32 @f2(i32 %a, i16 %b, i32 %c) {
; CHECK-LABEL: f2:
; CHECK: mul
; CHECK: add{{.*}}, asr #16
%tmp1 = sext i16 %b to i32
%tmp2 = mul i32 %a, %tmp1
%tmp3 = ashr i32 %tmp2, 16
%tmp4 = add i32 %tmp3, %c
ret i32 %tmp4
}