1 ; RUN: llc -mtriple=i686-unknown-unknown < %s | FileCheck %s 2 ; RUN: llc -mtriple=i686-unknown-unknown -O0 < %s | FileCheck %s -check-prefix=CHECK0 3 4 %struct.interrupt_frame = type { i32, i32, i32, i32, i32 } 5 6 @llvm.used = appending global [4 x i8*] [i8* bitcast (void (%struct.interrupt_frame*)* @test_isr_no_ecode to i8*), i8* bitcast (void (%struct.interrupt_frame*, i32)* @test_isr_ecode to i8*), i8* bitcast (void (%struct.interrupt_frame*, i32)* @test_isr_clobbers to i8*), i8* bitcast (void (%struct.interrupt_frame*)* @test_isr_x87 to i8*)], section "llvm.metadata" 7 8 ; Spills eax, putting original esp at +4. 9 ; No stack adjustment if declared with no error code 10 define x86_intrcc void @test_isr_no_ecode(%struct.interrupt_frame* %frame) { 11 ; CHECK-LABEL: test_isr_no_ecode: 12 ; CHECK: pushl %eax 13 ; CHECK: movl 12(%esp), %eax 14 ; CHECK: popl %eax 15 ; CHECK: iretl 16 ; CHECK0-LABEL: test_isr_no_ecode: 17 ; CHECK0: pushl %eax 18 ; CHECK0: leal 4(%esp), %eax 19 ; CHECK0: movl 8(%eax), %eax 20 ; CHECK0: popl %eax 21 ; CHECK0: iretl 22 %pflags = getelementptr inbounds %struct.interrupt_frame, %struct.interrupt_frame* %frame, i32 0, i32 2 23 %flags = load i32, i32* %pflags, align 4 24 call void asm sideeffect "", "r"(i32 %flags) 25 ret void 26 } 27 28 ; Spills eax and ecx, putting original esp at +8. Stack is adjusted up another 4 bytes 29 ; before return, popping the error code. 30 define x86_intrcc void @test_isr_ecode(%struct.interrupt_frame* %frame, i32 %ecode) { 31 ; CHECK-LABEL: test_isr_ecode 32 ; CHECK: pushl %ecx 33 ; CHECK: pushl %eax 34 ; CHECK: movl 8(%esp), %eax 35 ; CHECK: movl 20(%esp), %ecx 36 ; CHECK: popl %eax 37 ; CHECK: popl %ecx 38 ; CHECK: addl $4, %esp 39 ; CHECK: iretl 40 ; CHECK0-LABEL: test_isr_ecode 41 ; CHECK0: pushl %ecx 42 ; CHECK0: pushl %eax 43 ; CHECK0: movl 8(%esp), %eax 44 ; CHECK0: leal 12(%esp), %ecx 45 ; CHECK0: movl 8(%ecx), %ecx 46 ; CHECK0: popl %eax 47 ; CHECK0: popl %ecx 48 ; CHECK0: addl $4, %esp 49 ; CHECK0: iretl 50 %pflags = getelementptr inbounds %struct.interrupt_frame, %struct.interrupt_frame* %frame, i32 0, i32 2 51 %flags = load i32, i32* %pflags, align 4 52 call x86_fastcallcc void asm sideeffect "", "r,r"(i32 %flags, i32 %ecode) 53 ret void 54 } 55 56 ; All clobbered registers must be saved 57 define x86_intrcc void @test_isr_clobbers(%struct.interrupt_frame* %frame, i32 %ecode) { 58 call void asm sideeffect "", "~{eax},~{ebx},~{ebp}"() 59 ; CHECK-LABEL: test_isr_clobbers 60 ; CHECK-SSE-NEXT: pushl %ebp 61 ; CHECK-SSE-NEXT: pushl %ebx 62 ; CHECK-SSE-NEXT; pushl %eax 63 ; CHECK-SSE-NEXT: popl %eax 64 ; CHECK-SSE-NEXT: popl %ebx 65 ; CHECK-SSE-NEXT: popl %ebp 66 ; CHECK-SSE-NEXT: addl $4, %esp 67 ; CHECK-SSE-NEXT: iretl 68 ; CHECK0-LABEL: test_isr_clobbers 69 ; CHECK0-SSE-NEXT: pushl %ebp 70 ; CHECK0-SSE-NEXT: pushl %ebx 71 ; CHECK0-SSE-NEXT; pushl %eax 72 ; CHECK0-SSE-NEXT: popl %eax 73 ; CHECK0-SSE-NEXT: popl %ebx 74 ; CHECK0-SSE-NEXT: popl %ebp 75 ; CHECK0-SSE-NEXT: addl $4, %esp 76 ; CHECK0-SSE-NEXT: iretl 77 ret void 78 } 79 80 @f80 = common global x86_fp80 0xK00000000000000000000, align 4 81 82 ; Test that the presence of x87 does not crash the FP stackifier 83 define x86_intrcc void @test_isr_x87(%struct.interrupt_frame* %frame) { 84 ; CHECK-LABEL: test_isr_x87 85 ; CHECK-DAG: fldt f80 86 ; CHECK-DAG: fld1 87 ; CHECK: faddp 88 ; CHECK-NEXT: fstpt f80 89 ; CHECK-NEXT: iretl 90 entry: 91 %ld = load x86_fp80, x86_fp80* @f80, align 4 92 %add = fadd x86_fp80 %ld, 0xK3FFF8000000000000000 93 store x86_fp80 %add, x86_fp80* @f80, align 4 94 ret void 95 } 96
