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X86: Call _alldiv instead of __divdi3 on Windows (excluding cygwin).

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116174 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael J. Spencer 2010-10-10 22:04:34 +00:00
parent ec38de2ca8
commit 1802a9f8fe
3 changed files with 27 additions and 3 deletions
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6
lib/Target/X86/X86ISelLowering.cpp
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@ -96,6 +96,12 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
setSchedulingPreference(Sched::RegPressure); setSchedulingPreference(Sched::RegPressure);
setStackPointerRegisterToSaveRestore(X86StackPtr); setStackPointerRegisterToSaveRestore(X86StackPtr);
if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygwin()) {
// Setup Windows compiler runtime calls.
setLibcallName(RTLIB::SDIV_I64, "_alldiv");
setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::X86_StdCall);
}
if (Subtarget->isTargetDarwin()) { if (Subtarget->isTargetDarwin()) {
// Darwin should use _setjmp/_longjmp instead of setjmp/longjmp. // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
setUseUnderscoreSetJmp(false); setUseUnderscoreSetJmp(false);

16
test/CodeGen/X86/alldiv-divdi3.ll Normal file
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@ -0,0 +1,16 @@
; Test that, for a 64 bit signed div, a libcall to alldiv is made on Windows
; except for cygwin.
; RUN: llc < %s -mtriple i386-pc-win32 | FileCheck %s
; RUN: llc < %s -mtriple i386-pc-cygwin | FileCheck %s -check-prefix CYGWIN
define i32 @main(i32 %argc, i8** nocapture %argv) nounwind readonly {
entry:
%conv4 = sext i32 %argc to i64
%div = sdiv i64 84, %conv4
%conv7 = trunc i64 %div to i32
ret i32 %conv7
}
; CHECK: alldiv
; CYGWIN: divdi3

6
test/CodeGen/X86/legalizedag_vec.ll
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@ -1,5 +1,4 @@
; RUN: llc < %s -march=x86 -mattr=sse2 -disable-mmx -o %t ; RUN: llc < %s -march=x86 -mattr=sse2 -disable-mmx | FileCheck %s
; RUN: grep {call.*divdi3} %t | count 2
; Test case for r63760 where we generate a legalization assert that an illegal ; Test case for r63760 where we generate a legalization assert that an illegal
@ -13,3 +12,6 @@ define <2 x i64> @test_long_div(<2 x i64> %num, <2 x i64> %div) {
%div.r = sdiv <2 x i64> %num, %div %div.r = sdiv <2 x i64> %num, %div
ret <2 x i64> %div.r ret <2 x i64> %div.r
} }
; CHECK: call{{.*(divdi3|alldiv)}}
; CHECK: call{{.*(divdi3|alldiv)}}