ccd3ecb95a
a zero register. Previously I tried this and saw LLVM unable to transform this to fold with memory operands such as spill slot rematerialization. However, it clearly works as shown in this patch. We turn these into `cmpb $0, <mem>` when useful for folding a memory operand without issue. This form has no disadvantage compared to `testb $-1, <mem>`. So overall, this is likely no worse and may be slightly smaller in some cases due to the `testb %reg, %reg` form. Differential Revision: https://reviews.llvm.org/D45475 llvm-svn: 330269
289 lines
8.1 KiB
LLVM
289 lines
8.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc < %s -mtriple=x86_64-pc-win32 | FileCheck %s --check-prefix=ALL --check-prefix=PUSHF
|
|
; RUN: llc < %s -mtriple=x86_64-pc-win32 -mattr=+sahf | FileCheck %s --check-prefix=ALL --check-prefix=SAHF
|
|
|
|
define i32 @f1(i32 %p1, i32 %p2, i32 %p3, i32 %p4, i32 %p5) "no-frame-pointer-elim"="true" {
|
|
; ALL-LABEL: f1:
|
|
; ALL: # %bb.0:
|
|
; ALL-NEXT: pushq %rbp
|
|
; ALL-NEXT: .seh_pushreg 5
|
|
; ALL-NEXT: movq %rsp, %rbp
|
|
; ALL-NEXT: .seh_setframe 5, 0
|
|
; ALL-NEXT: .seh_endprologue
|
|
; ALL-NEXT: movl 48(%rbp), %eax
|
|
; ALL-NEXT: popq %rbp
|
|
; ALL-NEXT: retq
|
|
; ALL-NEXT: .seh_handlerdata
|
|
; ALL-NEXT: .text
|
|
; ALL-NEXT: .seh_endproc
|
|
ret i32 %p5
|
|
}
|
|
|
|
define void @f2(i32 %p, ...) "no-frame-pointer-elim"="true" {
|
|
; ALL-LABEL: f2:
|
|
; ALL: # %bb.0:
|
|
; ALL-NEXT: pushq %rbp
|
|
; ALL-NEXT: .seh_pushreg 5
|
|
; ALL-NEXT: pushq %rax
|
|
; ALL-NEXT: .seh_stackalloc 8
|
|
; ALL-NEXT: movq %rsp, %rbp
|
|
; ALL-NEXT: .seh_setframe 5, 0
|
|
; ALL-NEXT: .seh_endprologue
|
|
; ALL-NEXT: movq %r9, 48(%rbp)
|
|
; ALL-NEXT: movq %r8, 40(%rbp)
|
|
; ALL-NEXT: movq %rdx, 32(%rbp)
|
|
; ALL-NEXT: leaq 32(%rbp), %rax
|
|
; ALL-NEXT: movq %rax, (%rbp)
|
|
; ALL-NEXT: addq $8, %rsp
|
|
; ALL-NEXT: popq %rbp
|
|
; ALL-NEXT: retq
|
|
; ALL-NEXT: .seh_handlerdata
|
|
; ALL-NEXT: .text
|
|
; ALL-NEXT: .seh_endproc
|
|
%ap = alloca i8, align 8
|
|
call void @llvm.va_start(i8* %ap)
|
|
ret void
|
|
}
|
|
|
|
define i8* @f3() "no-frame-pointer-elim"="true" {
|
|
; ALL-LABEL: f3:
|
|
; ALL: # %bb.0:
|
|
; ALL-NEXT: pushq %rbp
|
|
; ALL-NEXT: .seh_pushreg 5
|
|
; ALL-NEXT: movq %rsp, %rbp
|
|
; ALL-NEXT: .seh_setframe 5, 0
|
|
; ALL-NEXT: .seh_endprologue
|
|
; ALL-NEXT: movq 8(%rbp), %rax
|
|
; ALL-NEXT: popq %rbp
|
|
; ALL-NEXT: retq
|
|
; ALL-NEXT: .seh_handlerdata
|
|
; ALL-NEXT: .text
|
|
; ALL-NEXT: .seh_endproc
|
|
%ra = call i8* @llvm.returnaddress(i32 0)
|
|
ret i8* %ra
|
|
}
|
|
|
|
define i8* @f4() "no-frame-pointer-elim"="true" {
|
|
; ALL-LABEL: f4:
|
|
; ALL: # %bb.0:
|
|
; ALL-NEXT: pushq %rbp
|
|
; ALL-NEXT: .seh_pushreg 5
|
|
; ALL-NEXT: subq $304, %rsp # imm = 0x130
|
|
; ALL-NEXT: .seh_stackalloc 304
|
|
; ALL-NEXT: leaq {{[0-9]+}}(%rsp), %rbp
|
|
; ALL-NEXT: .seh_setframe 5, 128
|
|
; ALL-NEXT: .seh_endprologue
|
|
; ALL-NEXT: movq 184(%rbp), %rax
|
|
; ALL-NEXT: addq $304, %rsp # imm = 0x130
|
|
; ALL-NEXT: popq %rbp
|
|
; ALL-NEXT: retq
|
|
; ALL-NEXT: .seh_handlerdata
|
|
; ALL-NEXT: .text
|
|
; ALL-NEXT: .seh_endproc
|
|
alloca [300 x i8]
|
|
%ra = call i8* @llvm.returnaddress(i32 0)
|
|
ret i8* %ra
|
|
}
|
|
|
|
declare void @external(i8*)
|
|
|
|
define void @f5() "no-frame-pointer-elim"="true" {
|
|
; ALL-LABEL: f5:
|
|
; ALL: # %bb.0:
|
|
; ALL-NEXT: pushq %rbp
|
|
; ALL-NEXT: .seh_pushreg 5
|
|
; ALL-NEXT: subq $336, %rsp # imm = 0x150
|
|
; ALL-NEXT: .seh_stackalloc 336
|
|
; ALL-NEXT: leaq {{[0-9]+}}(%rsp), %rbp
|
|
; ALL-NEXT: .seh_setframe 5, 128
|
|
; ALL-NEXT: .seh_endprologue
|
|
; ALL-NEXT: leaq -92(%rbp), %rcx
|
|
; ALL-NEXT: callq external
|
|
; ALL-NEXT: nop
|
|
; ALL-NEXT: addq $336, %rsp # imm = 0x150
|
|
; ALL-NEXT: popq %rbp
|
|
; ALL-NEXT: retq
|
|
; ALL-NEXT: .seh_handlerdata
|
|
; ALL-NEXT: .text
|
|
; ALL-NEXT: .seh_endproc
|
|
%a = alloca [300 x i8]
|
|
%gep = getelementptr [300 x i8], [300 x i8]* %a, i32 0, i32 0
|
|
call void @external(i8* %gep)
|
|
ret void
|
|
}
|
|
|
|
define void @f6(i32 %p, ...) "no-frame-pointer-elim"="true" {
|
|
; ALL-LABEL: f6:
|
|
; ALL: # %bb.0:
|
|
; ALL-NEXT: pushq %rbp
|
|
; ALL-NEXT: .seh_pushreg 5
|
|
; ALL-NEXT: subq $336, %rsp # imm = 0x150
|
|
; ALL-NEXT: .seh_stackalloc 336
|
|
; ALL-NEXT: leaq {{[0-9]+}}(%rsp), %rbp
|
|
; ALL-NEXT: .seh_setframe 5, 128
|
|
; ALL-NEXT: .seh_endprologue
|
|
; ALL-NEXT: leaq -92(%rbp), %rcx
|
|
; ALL-NEXT: callq external
|
|
; ALL-NEXT: nop
|
|
; ALL-NEXT: addq $336, %rsp # imm = 0x150
|
|
; ALL-NEXT: popq %rbp
|
|
; ALL-NEXT: retq
|
|
; ALL-NEXT: .seh_handlerdata
|
|
; ALL-NEXT: .text
|
|
; ALL-NEXT: .seh_endproc
|
|
%a = alloca [300 x i8]
|
|
%gep = getelementptr [300 x i8], [300 x i8]* %a, i32 0, i32 0
|
|
call void @external(i8* %gep)
|
|
ret void
|
|
}
|
|
|
|
define i32 @f7(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) "no-frame-pointer-elim"="true" {
|
|
; ALL-LABEL: f7:
|
|
; ALL: # %bb.0:
|
|
; ALL-NEXT: pushq %rbp
|
|
; ALL-NEXT: .seh_pushreg 5
|
|
; ALL-NEXT: subq $304, %rsp # imm = 0x130
|
|
; ALL-NEXT: .seh_stackalloc 304
|
|
; ALL-NEXT: leaq {{[0-9]+}}(%rsp), %rbp
|
|
; ALL-NEXT: .seh_setframe 5, 128
|
|
; ALL-NEXT: .seh_endprologue
|
|
; ALL-NEXT: andq $-64, %rsp
|
|
; ALL-NEXT: movl 224(%rbp), %eax
|
|
; ALL-NEXT: leaq 176(%rbp), %rsp
|
|
; ALL-NEXT: popq %rbp
|
|
; ALL-NEXT: retq
|
|
; ALL-NEXT: .seh_handlerdata
|
|
; ALL-NEXT: .text
|
|
; ALL-NEXT: .seh_endproc
|
|
alloca [300 x i8], align 64
|
|
ret i32 %e
|
|
}
|
|
|
|
define i32 @f8(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) "no-frame-pointer-elim"="true" {
|
|
; ALL-LABEL: f8:
|
|
; ALL: # %bb.0:
|
|
; ALL-NEXT: pushq %rbp
|
|
; ALL-NEXT: .seh_pushreg 5
|
|
; ALL-NEXT: pushq %rsi
|
|
; ALL-NEXT: .seh_pushreg 6
|
|
; ALL-NEXT: pushq %rbx
|
|
; ALL-NEXT: .seh_pushreg 3
|
|
; ALL-NEXT: subq $352, %rsp # imm = 0x160
|
|
; ALL-NEXT: .seh_stackalloc 352
|
|
; ALL-NEXT: leaq {{[0-9]+}}(%rsp), %rbp
|
|
; ALL-NEXT: .seh_setframe 5, 128
|
|
; ALL-NEXT: .seh_endprologue
|
|
; ALL-NEXT: andq $-64, %rsp
|
|
; ALL-NEXT: movq %rsp, %rbx
|
|
; ALL-NEXT: movl 288(%rbp), %esi
|
|
; ALL-NEXT: movl %ecx, %eax
|
|
; ALL-NEXT: leaq 15(,%rax,4), %rax
|
|
; ALL-NEXT: andq $-16, %rax
|
|
; ALL-NEXT: callq __chkstk
|
|
; ALL-NEXT: subq %rax, %rsp
|
|
; ALL-NEXT: subq $32, %rsp
|
|
; ALL-NEXT: movq %rbx, %rcx
|
|
; ALL-NEXT: callq external
|
|
; ALL-NEXT: addq $32, %rsp
|
|
; ALL-NEXT: movl %esi, %eax
|
|
; ALL-NEXT: leaq 224(%rbp), %rsp
|
|
; ALL-NEXT: popq %rbx
|
|
; ALL-NEXT: popq %rsi
|
|
; ALL-NEXT: popq %rbp
|
|
; ALL-NEXT: retq
|
|
; ALL-NEXT: .seh_handlerdata
|
|
; ALL-NEXT: .text
|
|
; ALL-NEXT: .seh_endproc
|
|
%alloca = alloca [300 x i8], align 64
|
|
alloca i32, i32 %a
|
|
%gep = getelementptr [300 x i8], [300 x i8]* %alloca, i32 0, i32 0
|
|
call void @external(i8* %gep)
|
|
ret i32 %e
|
|
}
|
|
|
|
define i64 @f9() {
|
|
; ALL-LABEL: f9:
|
|
; ALL: # %bb.0: # %entry
|
|
; ALL-NEXT: pushq %rbp
|
|
; ALL-NEXT: .seh_pushreg 5
|
|
; ALL-NEXT: movq %rsp, %rbp
|
|
; ALL-NEXT: .seh_setframe 5, 0
|
|
; ALL-NEXT: .seh_endprologue
|
|
; ALL-NEXT: pushfq
|
|
; ALL-NEXT: popq %rax
|
|
; ALL-NEXT: popq %rbp
|
|
; ALL-NEXT: retq
|
|
; ALL-NEXT: .seh_handlerdata
|
|
; ALL-NEXT: .text
|
|
; ALL-NEXT: .seh_endproc
|
|
entry:
|
|
%call = call i64 @llvm.x86.flags.read.u64()
|
|
ret i64 %call
|
|
}
|
|
|
|
declare i64 @dummy()
|
|
|
|
define i64 @f10(i64* %foo, i64 %bar, i64 %baz) {
|
|
; ALL-LABEL: f10:
|
|
; ALL: # %bb.0:
|
|
; ALL-NEXT: pushq %rsi
|
|
; ALL-NEXT: .seh_pushreg 6
|
|
; ALL-NEXT: pushq %rbx
|
|
; ALL-NEXT: .seh_pushreg 3
|
|
; ALL-NEXT: subq $40, %rsp
|
|
; ALL-NEXT: .seh_stackalloc 40
|
|
; ALL-NEXT: .seh_endprologue
|
|
; ALL-NEXT: movq %rdx, %rsi
|
|
; ALL-NEXT: movq %rdx, %rax
|
|
; ALL-NEXT: lock cmpxchgq %r8, (%rcx)
|
|
; ALL-NEXT: sete %bl
|
|
; ALL-NEXT: callq dummy
|
|
; ALL-NEXT: testb %bl, %bl
|
|
; ALL-NEXT: cmoveq %rsi, %rax
|
|
; ALL-NEXT: addq $40, %rsp
|
|
; ALL-NEXT: popq %rbx
|
|
; ALL-NEXT: popq %rsi
|
|
; ALL-NEXT: retq
|
|
; ALL-NEXT: .seh_handlerdata
|
|
; ALL-NEXT: .text
|
|
; ALL-NEXT: .seh_endproc
|
|
%cx = cmpxchg i64* %foo, i64 %bar, i64 %baz seq_cst seq_cst
|
|
%v = extractvalue { i64, i1 } %cx, 0
|
|
%p = extractvalue { i64, i1 } %cx, 1
|
|
%call = call i64 @dummy()
|
|
%sel = select i1 %p, i64 %call, i64 %bar
|
|
ret i64 %sel
|
|
}
|
|
|
|
define i8* @f11() "no-frame-pointer-elim"="true" {
|
|
; ALL-LABEL: f11:
|
|
; ALL: # %bb.0:
|
|
; ALL-NEXT: pushq %rbp
|
|
; ALL-NEXT: .seh_pushreg 5
|
|
; ALL-NEXT: movq %rsp, %rbp
|
|
; ALL-NEXT: .seh_setframe 5, 0
|
|
; ALL-NEXT: .seh_endprologue
|
|
; ALL-NEXT: leaq 8(%rbp), %rax
|
|
; ALL-NEXT: popq %rbp
|
|
; ALL-NEXT: retq
|
|
; ALL-NEXT: .seh_handlerdata
|
|
; ALL-NEXT: .text
|
|
; ALL-NEXT: .seh_endproc
|
|
%aora = call i8* @llvm.addressofreturnaddress()
|
|
ret i8* %aora
|
|
}
|
|
|
|
define i8* @f12() {
|
|
; ALL-LABEL: f12:
|
|
; ALL: # %bb.0:
|
|
; ALL-NEXT: movq %rsp, %rax
|
|
; ALL-NEXT: retq
|
|
%aora = call i8* @llvm.addressofreturnaddress()
|
|
ret i8* %aora
|
|
}
|
|
|
|
declare i8* @llvm.returnaddress(i32) nounwind readnone
|
|
declare i8* @llvm.addressofreturnaddress() nounwind readnone
|
|
declare i64 @llvm.x86.flags.read.u64()
|
|
declare void @llvm.va_start(i8*) nounwind
|