mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-21 00:32:23 +00:00
b2b5dc642c
This reverts commit 98a9b72e8c.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184823 91177308-0d34-0410-b5e6-96231b3b80d8
56 lines
2.1 KiB
LLVM
56 lines
2.1 KiB
LLVM
; RUN: llc -mcpu=generic -mtriple=i386-apple-darwin -tailcallopt < %s | FileCheck %s
|
|
; Check that lowered argumens do not overwrite the return address before it is moved.
|
|
; Bug 6225
|
|
;
|
|
; If a call is a fastcc tail call and tail call optimization is enabled, the
|
|
; caller frame is replaced by the callee frame. This can require that arguments are
|
|
; placed on the former return address stack slot. Special care needs to be taken
|
|
; taken that the return address is moved / or stored in a register before
|
|
; lowering of arguments potentially overwrites the value.
|
|
;
|
|
; Move return address (76(%esp)) to a temporary register (%ebp)
|
|
; CHECK: movl 76(%esp), [[REGISTER:%[a-z]+]]
|
|
; Overwrite return addresss
|
|
; CHECK: movl [[EBX:%[a-z]+]], 76(%esp)
|
|
; Move return address from temporary register (%ebp) to new stack location (60(%esp))
|
|
; CHECK: movl [[REGISTER]], 60(%esp)
|
|
|
|
%tupl_p = type [9 x i32]*
|
|
|
|
declare fastcc void @l297(i32 %r10, i32 %r9, i32 %r8, i32 %r7, i32 %r6, i32 %r5, i32 %r3, i32 %r2) noreturn nounwind
|
|
declare fastcc void @l298(i32 %r10, i32 %r9, i32 %r4) noreturn nounwind
|
|
|
|
define fastcc void @l186(%tupl_p %r1) noreturn nounwind {
|
|
entry:
|
|
%ptr1 = getelementptr %tupl_p %r1, i32 0, i32 0
|
|
%r2 = load i32* %ptr1
|
|
%ptr3 = getelementptr %tupl_p %r1, i32 0, i32 1
|
|
%r3 = load i32* %ptr3
|
|
%ptr5 = getelementptr %tupl_p %r1, i32 0, i32 2
|
|
%r4 = load i32* %ptr5
|
|
%ptr7 = getelementptr %tupl_p %r1, i32 0, i32 3
|
|
%r5 = load i32* %ptr7
|
|
%ptr9 = getelementptr %tupl_p %r1, i32 0, i32 4
|
|
%r6 = load i32* %ptr9
|
|
%ptr11 = getelementptr %tupl_p %r1, i32 0, i32 5
|
|
%r7 = load i32* %ptr11
|
|
%ptr13 = getelementptr %tupl_p %r1, i32 0, i32 6
|
|
%r8 = load i32* %ptr13
|
|
%ptr15 = getelementptr %tupl_p %r1, i32 0, i32 7
|
|
%r9 = load i32* %ptr15
|
|
%ptr17 = getelementptr %tupl_p %r1, i32 0, i32 8
|
|
%r10 = load i32* %ptr17
|
|
%cond = icmp eq i32 %r10, 3
|
|
br i1 %cond, label %true, label %false
|
|
|
|
true:
|
|
tail call fastcc void @l297(i32 %r10, i32 %r9, i32 %r8, i32 %r7, i32 %r6, i32 %r5, i32 %r3, i32 %r2) noreturn nounwind
|
|
ret void
|
|
|
|
false:
|
|
tail call fastcc void @l298(i32 %r10, i32 %r9, i32 %r4) noreturn nounwind
|
|
ret void
|
|
}
|
|
|
|
|