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13e607925f
Emulated TLS is enabled by llc flag -emulated-tls, which is passed by clang driver. When llc is called explicitly or from other drivers like LTO, missing -emulated-tls flag would generate wrong TLS code for targets that supports only this mode. Now use useEmulatedTLS() instead of Options.EmulatedTLS to decide whether emulated TLS code should be generated. Unit tests are modified to run with and without the -emulated-tls flag. Differential Revision: https://reviews.llvm.org/D42999 llvm-svn: 326341
53 lines
1.4 KiB
LLVM
53 lines
1.4 KiB
LLVM
; RUN: llc < %s -emulated-tls -relocation-model=pic -mtriple=i686-unknown-linux-gnu -fast-isel | FileCheck %s
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; RUN: llc < %s -relocation-model=pic -mtriple=i686-unknown-linux-gnu -fast-isel \
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; RUN: | FileCheck -check-prefix=NoEMU %s
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; PR3654
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; NoEMU-NOT: __emutls
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@v = thread_local global i32 0
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define i32 @f() nounwind {
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entry:
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%t = load i32, i32* @v
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%s = add i32 %t, 1
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ret i32 %s
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}
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; CHECK-LABEL: f:
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; CHECK: movl __emutls_v.v@GOT(%ebx), %eax
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; CHECK-NEXT: movl %eax, (%esp)
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; CHECK-NEXT: calll __emutls_get_address@PLT
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; CHECK-NEXT: movl (%eax), %eax
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@alias = internal alias i32, i32* @v
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define i32 @f_alias() nounwind {
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entry:
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%t = load i32, i32* @v
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%s = add i32 %t, 1
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ret i32 %s
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}
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; CHECK-LABEL: f_alias:
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; CHECK: movl __emutls_v.v@GOT(%ebx), %eax
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; CHECK-NEXT: movl %eax, (%esp)
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; CHECK-NEXT: calll __emutls_get_address@PLT
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; CHECK-NEXT: movl (%eax), %eax
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; Use my_emutls_get_address like __emutls_get_address.
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@my_emutls_v_xyz = external global i8*, align 4
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declare i8* @my_emutls_get_address(i8*)
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define i32 @my_get_xyz() {
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entry:
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%call = call i8* @my_emutls_get_address(i8* bitcast (i8** @my_emutls_v_xyz to i8*))
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%0 = bitcast i8* %call to i32*
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%1 = load i32, i32* %0, align 4
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ret i32 %1
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}
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; CHECK-LABEL: my_get_xyz:
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; CHECK: movl my_emutls_v_xyz@GOT(%ebx), %eax
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; CHECK-NEXT: movl %eax, (%esp)
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; CHECK-NEXT: calll my_emutls_get_address@PLT
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; CHECK-NEXT: movl (%eax), %eax
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