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llvm-mirror/test/CodeGen/X86/tail-call-got.ll

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This test requires sse, otherwise x87 ops will block tailcall optimization llvm-svn: 138859
2011-08-31 18:49:05 +02:00
; RUN: llc < %s -relocation-model=pic -mattr=+sse2 | FileCheck %s
Fix X86TargetLowering::LowerExternalSymbol so that it actually works in non-trivial cases. This hasn't been an issue before because the function isn't normally called (but apparently is used to generate a tail-call to sin() on ELF x86-32 with PIC and SSE2). Fixes PR9693. llvm-svn: 137292
2011-08-11 03:48:05 +02:00
Disable x86 tail call optimizations that jump through GOT 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
2015-05-28 22:44:28 +02:00
; We used to do tail calls through the GOT for these symbols, but it was
; disabled due to PR15086.
Fix X86TargetLowering::LowerExternalSymbol so that it actually works in non-trivial cases. This hasn't been an issue before because the function isn't normally called (but apparently is used to generate a tail-call to sin() on ELF x86-32 with PIC and SSE2). Fixes PR9693. llvm-svn: 137292
2011-08-11 03:48:05 +02:00
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"
target triple = "i386-unknown-freebsd9.0"
define double @test1(double %x) nounwind readnone {
Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258
2013-07-13 22:38:47 +02:00
; CHECK-LABEL: test1:
Disable x86 tail call optimizations that jump through GOT 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
2015-05-28 22:44:28 +02:00
; CHECK: calll foo@PLT
Fix X86TargetLowering::LowerExternalSymbol so that it actually works in non-trivial cases. This hasn't been an issue before because the function isn't normally called (but apparently is used to generate a tail-call to sin() on ELF x86-32 with PIC and SSE2). Fixes PR9693. llvm-svn: 137292
2011-08-11 03:48:05 +02:00
%1 = tail call double @foo(double %x) nounwind readnone
ret double %1
}
declare double @foo(double) readnone
define double @test2(double %x) nounwind readnone {
Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258
2013-07-13 22:38:47 +02:00
; CHECK-LABEL: test2:
Disable x86 tail call optimizations that jump through GOT 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
2015-05-28 22:44:28 +02:00
; CHECK: calll sin@PLT
Fix X86TargetLowering::LowerExternalSymbol so that it actually works in non-trivial cases. This hasn't been an issue before because the function isn't normally called (but apparently is used to generate a tail-call to sin() on ELF x86-32 with PIC and SSE2). Fixes PR9693. llvm-svn: 137292
2011-08-11 03:48:05 +02:00
%1 = tail call double @sin(double %x) nounwind readnone
ret double %1
}
declare double @sin(double) readnone
Disable x86 tail call optimizations that jump through GOT 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
2015-05-28 22:44:28 +02:00
define double @test3(double %x) nounwind readnone {
; CHECK-LABEL: test3:
; CHECK: calll sin2@PLT
%1 = tail call double @sin2(double %x) nounwind readnone
ret double %1
}
declare double @sin2(double) readnone
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