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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
33 lines
1.1 KiB
LLVM
33 lines
1.1 KiB
LLVM
; RUN: llc -mtriple="powerpc64le-unknown-linux-gnu" -relocation-model=pic < %s | FileCheck %s
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; CHECK-LABEL: foo_test:
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; CHECK: mflr 0
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; CHECK: __tls_get_addr
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%struct1.2.41 = type { %struct2.0.39, %struct3.1.40, %struct1.2.41* }
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%struct2.0.39 = type { i64, i32, i32, i32, i32 }
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%struct3.1.40 = type { [160 x i8] }
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@tls_var = external thread_local global %struct1.2.41*, align 8
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define void @foo_test() {
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%1 = load %struct1.2.41*, %struct1.2.41** @tls_var, align 8
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br i1 undef, label %foo.exit, label %2
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; <label>:2 ; preds = %0
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br i1 undef, label %foo.exit, label %3
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; <label>:3 ; preds = %2
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%4 = getelementptr inbounds %struct1.2.41, %struct1.2.41* %1, i64 0, i32 0, i32 3
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%5 = load i32, i32* %4, align 8
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%6 = add nsw i32 %5, -1
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%7 = icmp eq i32 %6, 0
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br i1 %7, label %8, label %foo.exit
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; <label>:8 ; preds = %3
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tail call void undef(%struct1.2.41* undef, %struct1.2.41* nonnull undef)
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br label %foo.exit
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foo.exit: ; preds = %8, %3, %2, %0
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ret void
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}
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