llvm-6502/test/CodeGen/X86/muloti.ll
Eric Christopher 362fee90b9 Lower multiply with overflow checking to __mulo<mode>
calls if we haven't been able to lower them any
other way.

Fixes rdar://9090077 and rdar://9210061


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133288 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-17 20:41:29 +00:00

39 lines
1.3 KiB
LLVM

; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
%0 = type { i64, i64 }
%1 = type { i128, i1 }
@.str = private unnamed_addr constant [11 x i8] c"%llx %llx\0A\00", align 1
define %0 @x(i64 %a.coerce0, i64 %a.coerce1, i64 %b.coerce0, i64 %b.coerce1) nounwind uwtable ssp {
entry:
%tmp16 = zext i64 %a.coerce0 to i128
%tmp11 = zext i64 %a.coerce1 to i128
%tmp12 = shl nuw i128 %tmp11, 64
%ins14 = or i128 %tmp12, %tmp16
%tmp6 = zext i64 %b.coerce0 to i128
%tmp3 = zext i64 %b.coerce1 to i128
%tmp4 = shl nuw i128 %tmp3, 64
%ins = or i128 %tmp4, %tmp6
%0 = tail call %1 @llvm.smul.with.overflow.i128(i128 %ins14, i128 %ins)
; CHECK: callq ___muloti4
%1 = extractvalue %1 %0, 0
%2 = extractvalue %1 %0, 1
br i1 %2, label %overflow, label %nooverflow
overflow: ; preds = %entry
tail call void @llvm.trap()
unreachable
nooverflow: ; preds = %entry
%tmp20 = trunc i128 %1 to i64
%tmp21 = insertvalue %0 undef, i64 %tmp20, 0
%tmp22 = lshr i128 %1, 64
%tmp23 = trunc i128 %tmp22 to i64
%tmp24 = insertvalue %0 %tmp21, i64 %tmp23, 1
ret %0 %tmp24
}
declare %1 @llvm.smul.with.overflow.i128(i128, i128) nounwind readnone
declare void @llvm.trap() nounwind