| ; RUN: llc -mtriple=x86_64-unknown-unknown < %s | FileCheck %s |
| ; RUN: llc -mtriple=x86_64-unknown-unknown -O0 < %s | FileCheck %s -check-prefix=CHECK0 |
| |
| %struct.interrupt_frame = type { i64, i64, i64, i64, i64 } |
| |
| @sink_address = dso_local global ptr null |
| @sink_i32 = dso_local global i64 0 |
| |
| ; Spills rax, putting original esp at +8. |
| ; No stack adjustment if declared with no error code |
| define x86_intrcc void @test_isr_no_ecode(ptr byval(%struct.interrupt_frame) %frame) { |
| ; CHECK-LABEL: test_isr_no_ecode: |
| ; CHECK: pushq %rax |
| ; CHECK: movq 24(%rsp), %rax |
| ; CHECK: popq %rax |
| ; CHECK: iretq |
| ; CHECK0-LABEL: test_isr_no_ecode: |
| ; CHECK0: pushq %rax |
| ; CHECK0: leaq 8(%rsp), %rax |
| ; CHECK0: movq 16(%rax), %rax |
| ; CHECK0: popq %rax |
| ; CHECK0: iretq |
| %pflags = getelementptr inbounds %struct.interrupt_frame, ptr %frame, i32 0, i32 2 |
| %flags = load i64, ptr %pflags, align 4 |
| call void asm sideeffect "", "r"(i64 %flags) |
| ret void |
| } |
| |
| ; Spills rax and rcx, putting original rsp at +16. Stack is adjusted up another 8 bytes |
| ; before return, popping the error code. |
| define x86_intrcc void @test_isr_ecode(ptr byval(%struct.interrupt_frame) %frame, i64 %ecode) { |
| ; CHECK-LABEL: test_isr_ecode |
| ; CHECK: pushq %rax |
| ; CHECK: pushq %rax |
| ; CHECK: pushq %rcx |
| ; CHECK: movq 24(%rsp), %rax |
| ; CHECK: movq 48(%rsp), %rcx |
| ; CHECK: popq %rcx |
| ; CHECK: popq %rax |
| ; CHECK: addq $16, %rsp |
| ; CHECK: iretq |
| ; CHECK0-LABEL: test_isr_ecode |
| ; CHECK0: pushq %rax |
| ; CHECK0: pushq %rax |
| ; CHECK0: pushq %rcx |
| ; CHECK0: movq 24(%rsp), %rcx |
| ; CHECK0: leaq 32(%rsp), %rax |
| ; CHECK0: movq 16(%rax), %rax |
| ; CHECK0: popq %rcx |
| ; CHECK0: popq %rax |
| ; CHECK0: addq $16, %rsp |
| ; CHECK0: iretq |
| %pflags = getelementptr inbounds %struct.interrupt_frame, ptr %frame, i32 0, i32 2 |
| %flags = load i64, ptr %pflags, align 4 |
| call void asm sideeffect "", "r,r"(i64 %flags, i64 %ecode) |
| ret void |
| } |
| |
| ; All clobbered registers must be saved |
| define x86_intrcc void @test_isr_clobbers(ptr byval(%struct.interrupt_frame) %frame, i64 %ecode) { |
| call void asm sideeffect "", "~{rax},~{rbx},~{rbp},~{r11},~{xmm0}"() |
| ; CHECK-LABEL: test_isr_clobbers |
| |
| ; CHECK: pushq %rax |
| ; CHECK: pushq %rbp |
| ; CHECK: pushq %r11 |
| ; CHECK: pushq %rbx |
| ; CHECK: movaps %xmm0 |
| ; CHECK: movaps {{.*}}, %xmm0 |
| ; CHECK: popq %rbx |
| ; CHECK: popq %r11 |
| ; CHECK: popq %rbp |
| ; CHECK: popq %rax |
| ; CHECK: addq $16, %rsp |
| ; CHECK: iretq |
| ; CHECK0-LABEL: test_isr_clobbers |
| |
| ; CHECK0: pushq %rax |
| ; CHECK0: pushq %rbp |
| ; CHECK0: pushq %r11 |
| ; CHECK0: pushq %rbx |
| ; CHECK0: movaps %xmm0 |
| ; CHECK0: movaps {{.*}}, %xmm0 |
| ; CHECK0: popq %rbx |
| ; CHECK0: popq %r11 |
| ; CHECK0: popq %rbp |
| ; CHECK0: popq %rax |
| ; CHECK0: addq $16, %rsp |
| ; CHECK0: iretq |
| ret void |
| } |
| |
| @f80 = common dso_local global x86_fp80 0xK00000000000000000000, align 4 |
| |
| ; Test that the presence of x87 does not crash the FP stackifier |
| define x86_intrcc void @test_isr_x87(ptr byval(%struct.interrupt_frame) %frame) { |
| ; CHECK-LABEL: test_isr_x87 |
| ; CHECK-DAG: fldt f80 |
| ; CHECK-DAG: fld1 |
| ; CHECK: faddp |
| ; CHECK-NEXT: fstpt f80 |
| ; CHECK-NEXT: iretq |
| entry: |
| %ld = load x86_fp80, ptr @f80, align 4 |
| %add = fadd x86_fp80 %ld, 0xK3FFF8000000000000000 |
| store x86_fp80 %add, ptr @f80, align 4 |
| ret void |
| } |
| |
| ; Use a frame pointer to check the offsets. No return address, arguments start |
| ; at RBP+4. |
| define dso_local x86_intrcc void @test_fp_1(ptr byval(%struct.interrupt_frame) %p) #0 { |
| ; CHECK-LABEL: test_fp_1: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rbp |
| ; CHECK-NEXT: movq %rsp, %rbp |
| ; CHECK: cld |
| ; CHECK-DAG: leaq 8(%rbp), %[[R1:[^ ]*]] |
| ; CHECK-DAG: leaq 40(%rbp), %[[R2:[^ ]*]] |
| ; CHECK: movq %[[R1]], sink_address |
| ; CHECK: movq %[[R2]], sink_address |
| ; CHECK: popq %rbp |
| ; CHECK: iretq |
| entry: |
| %arrayidx2 = getelementptr inbounds %struct.interrupt_frame, ptr %p, i64 0, i32 4 |
| store volatile ptr %p, ptr @sink_address |
| store volatile ptr %arrayidx2, ptr @sink_address |
| ret void |
| } |
| |
| ; The error code is between RBP and the interrupt_frame. |
| define dso_local x86_intrcc void @test_fp_2(ptr byval(%struct.interrupt_frame) %p, i64 %err) #0 { |
| ; CHECK-LABEL: test_fp_2: |
| ; CHECK: # %bb.0: # %entry |
| ; This RAX push is just to align the stack. |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: pushq %rbp |
| ; CHECK-NEXT: movq %rsp, %rbp |
| ; CHECK: cld |
| ; CHECK-DAG: movq 16(%rbp), %[[R3:[^ ]*]] |
| ; CHECK-DAG: leaq 24(%rbp), %[[R1:[^ ]*]] |
| ; CHECK-DAG: leaq 56(%rbp), %[[R2:[^ ]*]] |
| ; CHECK: movq %[[R1]], sink_address(%rip) |
| ; CHECK: movq %[[R2]], sink_address(%rip) |
| ; CHECK: movq %[[R3]], sink_i32(%rip) |
| ; CHECK: popq %rbp |
| ; Pop off both the error code and the 8 byte alignment adjustment from the |
| ; prologue. |
| ; CHECK: addq $16, %rsp |
| ; CHECK: iretq |
| entry: |
| %arrayidx2 = getelementptr inbounds %struct.interrupt_frame, ptr %p, i64 0, i32 4 |
| store volatile ptr %p, ptr @sink_address |
| store volatile ptr %arrayidx2, ptr @sink_address |
| store volatile i64 %err, ptr @sink_i32 |
| ret void |
| } |
| |
| ; Test argument copy elision when copied to a local alloca. |
| define x86_intrcc void @test_copy_elide(ptr byval(%struct.interrupt_frame) %frame, i64 %err) #0 { |
| ; CHECK-LABEL: test_copy_elide: |
| ; CHECK: # %bb.0: # %entry |
| ; This RAX push is just to align the stack. |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: pushq %rbp |
| ; CHECK-NEXT: movq %rsp, %rbp |
| ; CHECK: cld |
| ; CHECK: leaq 16(%rbp), %[[R1:[^ ]*]] |
| ; CHECK: movq %[[R1]], sink_address(%rip) |
| entry: |
| %err.addr = alloca i64, align 4 |
| store i64 %err, ptr %err.addr, align 4 |
| store volatile ptr %err.addr, ptr @sink_address |
| ret void |
| } |
| |
| define x86_intrcc void @test_stack_allocation(ptr byval(%struct.interrupt_frame) %frame, i64 %err) #1 { |
| ; CHECK-LABEL: test_stack_allocation: |
| ; CHECK: # %bb.0: # %entry |
| |
| ;; Ensure that STACKALLOC_W_PROBING isn't emitted. |
| ; CHECK-NOT: # fixed size alloca with probing |
| ;; Ensure that stack space is allocated. |
| ; CHECK: subq $280, %rsp |
| entry: |
| %some_allocation = alloca i64 |
| ;; Call a un-inlineable function to ensure the allocation isn't put in the red zone. |
| call void @external_function(ptr %some_allocation) |
| ret void |
| } |
| |
| declare void @external_function(ptr) |
| |
| attributes #0 = { nounwind "frame-pointer"="all" } |
| attributes #1 = { nounwind "probe-stack"="inline-asm" } |