forked from OSchip/llvm-project
60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
// RUN: %clang_cc1 -triple x86_64-linux-gnu -S -emit-llvm %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-X86-64
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// RUN: %clang_cc1 -triple arm64-linux-gnu -S -emit-llvm %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-ARM
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// RUN: %clang_cc1 -triple armv7-linux-gnu -target-abi apcs-gnu -S -emit-llvm %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-ARM
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// CHECK-NOT: @sp = common global
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#if defined(__x86_64__)
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register unsigned long current_stack_pointer asm("rsp");
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#else
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register unsigned long current_stack_pointer asm("sp");
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#endif
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struct p4_Thread {
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struct {
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int len;
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} word;
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};
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// Testing pointer types as well
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#if defined(__x86_64__)
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register struct p4_Thread *p4TH asm("rsp");
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#else
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register struct p4_Thread *p4TH asm("sp");
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#endif
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// CHECK: define{{.*}} i[[bits:[0-9]+]] @get_stack_pointer_addr()
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// CHECK: [[ret:%[0-9]+]] = call i[[bits]] @llvm.read_register.i[[bits]](metadata !0)
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// CHECK: ret i[[bits]] [[ret]]
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unsigned long get_stack_pointer_addr() {
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return current_stack_pointer;
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}
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// CHECK: declare{{.*}} i[[bits]] @llvm.read_register.i[[bits]](metadata)
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// CHECK: define{{.*}} void @set_stack_pointer_addr(i[[bits]] %addr) #0 {
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// CHECK: [[sto:%[0-9]+]] = load i[[bits]], i[[bits]]* %
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// CHECK: call void @llvm.write_register.i[[bits]](metadata !0, i[[bits]] [[sto]])
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// CHECK: ret void
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void set_stack_pointer_addr(unsigned long addr) {
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current_stack_pointer = addr;
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}
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// CHECK: declare{{.*}} void @llvm.write_register.i[[bits]](metadata, i[[bits]])
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// CHECK: define {{.*}}@fn1
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int fn1() {
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return (*p4TH).word.len;
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}
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// CHECK: %[[regr:[0-9]+]] = call i[[bits]] @llvm.read_register.i[[bits]](metadata !0)
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// CHECK: inttoptr i[[bits]] %[[regr]] to %struct.p4_Thread*
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// CHECK: define {{.*}}@fn2
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void fn2(struct p4_Thread *val) {
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p4TH = val;
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}
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// CHECK: %[[regw:[0-9]+]] = ptrtoint %struct.p4_Thread* %{{.*}} to i[[bits]]
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// CHECK: call void @llvm.write_register.i[[bits]](metadata !0, i[[bits]] %[[regw]])
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// CHECK-X86-64: !llvm.named.register.rsp = !{!0}
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// CHECK-X86-64: !0 = !{!"rsp"}
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// CHECK-ARM: !llvm.named.register.sp = !{!0}
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// CHECK-ARM: !0 = !{!"sp"}
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