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Change x86_fastcallcc to require inreg markers. This allows it to known

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the difference from "int x" (which should go in registers and
"struct y {int x;}" (which should not).

Clang will be updated in the next patches.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166536 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2012-10-24 01:58:48 +00:00
parent adf38913f8
commit 847a9c6d77
4 changed files with 6 additions and 6 deletions
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2
lib/Target/X86/X86CallingConv.td
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@ -324,7 +324,7 @@ def CC_X86_32_FastCall : CallingConv<[
CCIfNest<CCAssignToReg<[EAX]>>,
// The first 2 integer arguments are passed in ECX/EDX
CCIfType<[i32], CCAssignToReg<[ECX, EDX]>>,
CCIfInReg<CCIfType<[i32], CCAssignToReg<[ECX, EDX]>>>,
// Otherwise, same as everything else.
CCDelegateTo<CC_X86_32_Common>

4
test/CodeGen/X86/fast-cc-callee-pops.ll
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@ -2,12 +2,12 @@
; Check that a fastcc function pops its stack variables before returning.
define x86_fastcallcc void @func(i64 %X, i64 %Y, float %G, double %Z) nounwind {
define x86_fastcallcc void @func(i64 inreg %X, i64 %Y, float %G, double %Z) nounwind {
ret void
; CHECK: ret{{.*}}20
}
define x86_thiscallcc void @func2(i32 %X, i64 %Y, float %G, double %Z) nounwind {
define x86_thiscallcc void @func2(i32 inreg %X, i64 %Y, float %G, double %Z) nounwind {
ret void
; CHECK: ret{{.*}}20
}

2
test/CodeGen/X86/fast-cc-merge-stack-adj.ll
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@ -3,7 +3,7 @@
target triple = "i686-pc-linux-gnu"
declare x86_fastcallcc void @func(i32*, i64)
declare x86_fastcallcc void @func(i32*, i64 inreg)
define x86_fastcallcc void @caller(i32, i64) {
%X = alloca i32 ; <i32*> [#uses=1]

4
test/CodeGen/X86/fast-cc-pass-in-regs.ll
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@ -1,7 +1,7 @@
; RUN: llc < %s -march=x86 -x86-asm-syntax=intel | FileCheck %s
; check that fastcc is passing stuff in regs.
declare x86_fastcallcc i64 @callee(i64)
declare x86_fastcallcc i64 @callee(i64 inreg)
define i64 @caller() {
%X = call x86_fastcallcc i64 @callee( i64 4294967299 ) ; <i64> [#uses=1]
@ -9,7 +9,7 @@ define i64 @caller() {
ret i64 %X
}
define x86_fastcallcc i64 @caller2(i64 %X) {
define x86_fastcallcc i64 @caller2(i64 inreg %X) {
ret i64 %X
; CHECK: mov{{.*}}EAX, ECX
}