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2c78d5e9c7
For x86 targets, do not do sibling call optimization when materializing the callee's address would require a GOT relocation. We can still do tail calls to internal functions, hidden functions, and protected functions, because they do not require this kind of relocation. It is still possible to get GOT relocations when the user explicitly asks for it with musttail or -tailcallopt, both of which are supposed to guarantee TCO. Based on a patch by Chih-hung Hsieh. Reviewers: srhines, timmurray, danalbert, enh, void, nadav, rnk Subscribers: joerg, davidxl, llvm-commits Differential Revision: http://reviews.llvm.org/D9799 llvm-svn: 238487
35 lines
1001 B
LLVM
35 lines
1001 B
LLVM
; RUN: llc < %s -relocation-model=pic -mattr=+sse2 | FileCheck %s
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; We used to do tail calls through the GOT for these symbols, but it was
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; disabled due to PR15086.
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
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target triple = "i386-unknown-freebsd9.0"
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define double @test1(double %x) nounwind readnone {
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; CHECK-LABEL: test1:
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; CHECK: calll foo@PLT
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%1 = tail call double @foo(double %x) nounwind readnone
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ret double %1
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}
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declare double @foo(double) readnone
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define double @test2(double %x) nounwind readnone {
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; CHECK-LABEL: test2:
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; CHECK: calll sin@PLT
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%1 = tail call double @sin(double %x) nounwind readnone
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ret double %1
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}
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declare double @sin(double) readnone
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define double @test3(double %x) nounwind readnone {
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; CHECK-LABEL: test3:
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; CHECK: calll sin2@PLT
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%1 = tail call double @sin2(double %x) nounwind readnone
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ret double %1
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}
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declare double @sin2(double) readnone
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