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| author | H.J. Lu <hongjiu.lu@intel.com> | 2018-01-14 14:43:10 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl@gcc.gnu.org> | 2018-01-14 06:43:10 -0800 |
| commit | 95d11c1707a97883b62598aef2a6c1b86ed99c49 (patch) | |
| tree | 644b6ad219d131e735470112561e6caaef3f260c /gcc/config/i386 | |
| parent | 6abe11c1a3b9f86398134533560bdc57788a93c9 (diff) | |
| download | gcc-95d11c1707a97883b62598aef2a6c1b86ed99c49.zip gcc-95d11c1707a97883b62598aef2a6c1b86ed99c49.tar.gz gcc-95d11c1707a97883b62598aef2a6c1b86ed99c49.tar.bz2 | |
x86: Disallow -mindirect-branch=/-mfunction-return= with -mcmodel=large
Since the thunk function may not be reachable in large code model,
-mcmodel=large is incompatible with -mindirect-branch=thunk,
-mindirect-branch=thunk-extern, -mfunction-return=thunk and
-mfunction-return=thunk-extern. Issue an error when they are used with
-mcmodel=large.
gcc/
* config/i386/i386.c (ix86_set_indirect_branch_type): Disallow
-mcmodel=large with -mindirect-branch=thunk,
-mindirect-branch=thunk-extern, -mfunction-return=thunk and
-mfunction-return=thunk-extern.
* doc/invoke.texi: Document -mcmodel=large is incompatible with
-mindirect-branch=thunk, -mindirect-branch=thunk-extern,
-mfunction-return=thunk and -mfunction-return=thunk-extern.
gcc/testsuite/
* gcc.target/i386/indirect-thunk-10.c: New test.
* gcc.target/i386/indirect-thunk-8.c: Likewise.
* gcc.target/i386/indirect-thunk-9.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-10.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-11.c: Likewise.
* gcc.target/i386/indirect-thunk-attr-9.c: Likewise.
* gcc.target/i386/ret-thunk-17.c: Likewise.
* gcc.target/i386/ret-thunk-18.c: Likewise.
* gcc.target/i386/ret-thunk-19.c: Likewise.
* gcc.target/i386/ret-thunk-20.c: Likewise.
* gcc.target/i386/ret-thunk-21.c: Likewise.
From-SVN: r256664
Diffstat (limited to 'gcc/config/i386')
| -rw-r--r-- | gcc/config/i386/i386.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 4ae8901..9ac4ad6 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -5841,6 +5841,19 @@ ix86_set_indirect_branch_type (tree fndecl) } else cfun->machine->indirect_branch_type = ix86_indirect_branch; + + /* -mcmodel=large is not compatible with -mindirect-branch=thunk + nor -mindirect-branch=thunk-extern. */ + if ((ix86_cmodel == CM_LARGE || ix86_cmodel == CM_LARGE_PIC) + && ((cfun->machine->indirect_branch_type + == indirect_branch_thunk_extern) + || (cfun->machine->indirect_branch_type + == indirect_branch_thunk))) + error ("%<-mindirect-branch=%s%> and %<-mcmodel=large%> are not " + "compatible", + ((cfun->machine->indirect_branch_type + == indirect_branch_thunk_extern) + ? "thunk-extern" : "thunk")); } if (cfun->machine->function_return_type == indirect_branch_unset) @@ -5866,6 +5879,19 @@ ix86_set_indirect_branch_type (tree fndecl) } else cfun->machine->function_return_type = ix86_function_return; + + /* -mcmodel=large is not compatible with -mfunction-return=thunk + nor -mfunction-return=thunk-extern. */ + if ((ix86_cmodel == CM_LARGE || ix86_cmodel == CM_LARGE_PIC) + && ((cfun->machine->function_return_type + == indirect_branch_thunk_extern) + || (cfun->machine->function_return_type + == indirect_branch_thunk))) + error ("%<-mfunction-return=%s%> and %<-mcmodel=large%> are not " + "compatible", + ((cfun->machine->function_return_type + == indirect_branch_thunk_extern) + ? "thunk-extern" : "thunk")); } } |