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Teach fast isel calls and rets about stdcall.

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stdcall is callee-pop like thiscall, so the thiscall changes already did most
of the work for this.  This change only opts stdcall in and adds tests.

llvm-svn: 275414
This commit is contained in:
Nico Weber 2016-07-14 13:54:26 +00:00
parent aa5801aca2
commit 2cf597abfa
3 changed files with 31 additions and 6 deletions
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2
lib/Target/X86/X86FastISel.cpp
View File

@ -1151,6 +1151,7 @@ bool X86FastISel::X86SelectRet(const Instruction *I) {
if (CC != CallingConv::C &&
CC != CallingConv::Fast &&
CC != CallingConv::X86_FastCall &&
CC != CallingConv::X86_StdCall &&
CC != CallingConv::X86_ThisCall &&
CC != CallingConv::X86_64_SysV)
return false;
@ -3025,6 +3026,7 @@ bool X86FastISel::fastLowerCall(CallLoweringInfo &CLI) {
case CallingConv::WebKit_JS:
case CallingConv::Swift:
case CallingConv::X86_FastCall:
case CallingConv::X86_StdCall:
case CallingConv::X86_ThisCall:
case CallingConv::X86_64_Win64:
case CallingConv::X86_64_SysV:

15
test/CodeGen/X86/fast-isel-call.ll
View File

@ -57,7 +57,7 @@ define void @test4(i8* %a, i8* %b) {
; STDERR-NOT: FastISel missed call: call x86_thiscallcc void @thiscallfun
%struct.S = type { i8 }
define void @test5() #0 {
define void @test5() {
entry:
%s = alloca %struct.S, align 1
; CHECK-LABEL: test5:
@ -70,3 +70,16 @@ entry:
ret void
}
declare x86_thiscallcc void @thiscallfun(%struct.S*, i32) #1
; STDERR-NOT: FastISel missed call: call x86_stdcallcc void @stdcallfun
define void @test6() {
entry:
; CHECK-LABEL: test6:
; CHECK: subl $12, %esp
; CHECK: movl $43, (%esp)
; CHECK: calll {{.*}}stdcallfun
; CHECK: addl $8, %esp
call x86_stdcallcc void @stdcallfun(i32 43)
ret void
}
declare x86_stdcallcc void @stdcallfun(i32) #1

20
test/CodeGen/X86/fast-isel-x86.ll
View File

@ -1,4 +1,5 @@
; RUN: llc -fast-isel -O0 -mcpu=generic -mtriple=i386-apple-darwin10 -relocation-model=pic < %s | FileCheck %s
; RUN: llc -fast-isel -O0 -mcpu=generic -mtriple=i386-apple-darwin10 -relocation-model=pic < %s -fast-isel-verbose 2>&1 >/dev/null | FileCheck -check-prefix=STDERR -allow-empty %s
; This should use flds to set the return value.
; CHECK-LABEL: test0:
@ -21,8 +22,9 @@ define void @test1({i32, i32, i32, i32}* sret %p) nounwind {
; This should pop 8 bytes on return.
; CHECK-LABEL: thiscallfun:
; CHECK: retl $8
define x86_thiscallcc void @thiscallfun(i32* %this, i32 %a, i32 %b) nounwind {
ret void
define x86_thiscallcc i32 @thiscallfun(i32* %this, i32 %a, i32 %b) nounwind {
; STDERR-NOT: FastISel missed terminator: ret i32 12345
ret i32 12345
}
; Here, the callee pop doesn't fit the 16 bit immediate -- see x86-big-ret.ll
@ -36,11 +38,19 @@ define x86_thiscallcc void @thiscall_large(i32* %this, [65533 x i8]* byval %b) n
ret void
}
; This should pop 4 bytes on return.
; CHECK-LABEL: stdcallfun:
; CHECK: retl $4
define x86_stdcallcc i32 @stdcallfun(i32 %a) nounwind {
; STDERR-NOT: FastISel missed terminator: ret i32 54321
ret i32 54321
}
; Properly initialize the pic base.
; CHECK-LABEL: test2:
; CHECK-NOT: HHH
; CHECK: call{{.*}}L4$pb
; CHECK-NEXT: L4$pb:
; CHECK: call{{.*}}L5$pb
; CHECK-NEXT: L5$pb:
; CHECK-NEXT: pop
; CHECK: HHH
; CHECK: retl
@ -93,7 +103,7 @@ entry:
; SDag-ISel's arg push:
; CHECK: movl %esp, [[REGISTER:%[a-z]+]]
; CHECK: movl $42, ([[REGISTER]])
; CHECK: movl L_test5dllimport$non_lazy_ptr-L7$pb(%eax), %eax
; CHECK: movl L_test5dllimport$non_lazy_ptr-L8$pb(%eax), %eax
}
declare dllimport i32 @test5dllimport(i32)