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3e70e28803
Calls involved in thread-local variable lookup save more registers than normal calls. rdar://problem/23073171 llvm-svn: 252837
29 lines
879 B
LLVM
29 lines
879 B
LLVM
; RUN: llc < %s -mtriple x86_64-apple-darwin | FileCheck %s
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@a = thread_local global i32 4, align 4
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define i32 @f2(i32 %p1, i32 %p2, i32 %p3, i32 %p4, i32 %p5) {
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entry:
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; Parameters are in %edi, %esi, %edx, %ecx, %r8d, there is no need to save
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; these parameters except the one in %edi, before making the TLS call.
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; %edi is used to pass parameter to the TLS call.
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; CHECK-NOT: movl %r8d
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; CHECK-NOT: movl %ecx
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; CHECK-NOT: movl %edx
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; CHECK-NOT: movl %esi
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; CHECK: movq {{.*}}TLVP{{.*}}, %rdi
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; CHECK-NEXT: callq
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; CHECK-NEXT: movl (%rax),
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; CHECK-NOT: movl {{.*}}, %esi
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; CHECK-NOT: movl {{.*}}, %edx
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; CHECK-NOT: movl {{.*}}, %ecx
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; CHECK-NOT: movl {{.*}}, %r8d
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; CHECK: callq
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%0 = load i32, i32* @a, align 4
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%call = tail call i32 @f3(i32 %p1, i32 %p2, i32 %p3, i32 %p4, i32 %p5)
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%add = add nsw i32 %call, %0
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ret i32 %add
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}
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declare i32 @f3(i32, i32, i32, i32, i32)
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