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70e01b07f9
This is a fix for bug http://llvm.org/bugs/show_bug.cgi?id=25839. For a PIC TLS variable access in a function, prologue (mflr followed by std and stdu) gets scheduled after a tls_get_addr call. tls_get_addr messed up LR but no one saves/restores it. Also added a test for save/restore clobbered registers during calling __tls_get_addr. Patch by Tim Shen llvm-svn: 257137
55 lines
1.9 KiB
LLVM
55 lines
1.9 KiB
LLVM
; RUN: llc -mtriple="powerpc64le-unknown-linux-gnu" -relocation-model=pic < %s | FileCheck %s
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@a = thread_local global i32* null, align 8
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define void @test_foo(i32* nocapture %x01, i32* nocapture %x02, i32* nocapture %x03, i32* nocapture %x04, i32* nocapture %x05, i32* nocapture %x06, i32* nocapture %x07, i32* nocapture %x08) #0 {
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entry:
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; CHECK-LABEL: test_foo:
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; CHECK: stdu 1, {{-?[0-9]+}}(1)
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; CHECK-DAG: mr [[BACKUP_3:[0-9]+]], 3
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; CHECK-DAG: mr [[BACKUP_4:[0-9]+]], 4
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; CHECK-DAG: mr [[BACKUP_5:[0-9]+]], 5
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; CHECK-DAG: mr [[BACKUP_6:[0-9]+]], 6
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; CHECK-DAG: mr [[BACKUP_7:[0-9]+]], 7
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; CHECK-DAG: mr [[BACKUP_8:[0-9]+]], 8
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; CHECK-DAG: mr [[BACKUP_9:[0-9]+]], 9
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; CHECK-DAG: mr [[BACKUP_10:[0-9]+]], 10
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; CHECK-DAG: std [[BACKUP_3]], {{[0-9]+}}(1)
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; CHECK-DAG: std [[BACKUP_4]], {{[0-9]+}}(1)
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; CHECK-DAG: std [[BACKUP_5]], {{[0-9]+}}(1)
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; CHECK-DAG: std [[BACKUP_6]], {{[0-9]+}}(1)
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; CHECK-DAG: std [[BACKUP_7]], {{[0-9]+}}(1)
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; CHECK-DAG: std [[BACKUP_8]], {{[0-9]+}}(1)
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; CHECK-DAG: std [[BACKUP_9]], {{[0-9]+}}(1)
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; CHECK-DAG: std [[BACKUP_10]], {{[0-9]+}}(1)
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; CHECK: bl __tls_get_addr
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; CHECK-DAG: stw 3, 0([[BACKUP_3]])
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; CHECK-DAG: stw 3, 0([[BACKUP_4]])
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; CHECK-DAG: stw 3, 0([[BACKUP_5]])
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; CHECK-DAG: stw 3, 0([[BACKUP_6]])
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; CHECK-DAG: stw 3, 0([[BACKUP_7]])
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; CHECK-DAG: stw 3, 0([[BACKUP_8]])
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; CHECK-DAG: stw 3, 0([[BACKUP_9]])
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; CHECK-DAG: stw 3, 0([[BACKUP_10]])
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; CHECK: blr
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%0 = load i32*, i32** @a, align 8
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%cmp = icmp eq i32* %0, null
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br i1 %cmp, label %return, label %if.end
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if.end: ; preds = %entry
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store i32 0, i32* %x01, align 4
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store i32 0, i32* %x02, align 4
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store i32 0, i32* %x03, align 4
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store i32 0, i32* %x04, align 4
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store i32 0, i32* %x05, align 4
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store i32 0, i32* %x06, align 4
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store i32 0, i32* %x07, align 4
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store i32 0, i32* %x08, align 4
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br label %return
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return: ; preds = %entry, %if.end
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ret void
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}
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