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234 lines
8.6 KiB
234 lines
8.6 KiB
commit 5315d05c7295fbb9345d85d6bf7cbe7c975a19c8
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Author: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
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Date: Tue Jan 16 11:22:01 2018 +0000
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HJ patch #5
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diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
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index e73389b..15cfe83 100644
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--- a/gcc/config/i386/i386.c
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+++ b/gcc/config/i386/i386.c
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@@ -4634,6 +4634,19 @@ ix86_set_indirect_branch_type (tree fndecl)
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}
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else
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cfun->machine->indirect_branch_type = ix86_indirect_branch;
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+
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+ /* -mcmodel=large is not compatible with -mindirect-branch=thunk
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+ nor -mindirect-branch=thunk-extern. */
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+ if ((ix86_cmodel == CM_LARGE || ix86_cmodel == CM_LARGE_PIC)
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+ && ((cfun->machine->indirect_branch_type
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+ == indirect_branch_thunk_extern)
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+ || (cfun->machine->indirect_branch_type
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+ == indirect_branch_thunk)))
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+ error ("%<-mindirect-branch=%s%> and %<-mcmodel=large%> are not "
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+ "compatible",
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+ ((cfun->machine->indirect_branch_type
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+ == indirect_branch_thunk_extern)
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+ ? "thunk-extern" : "thunk"));
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}
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if (cfun->machine->function_return_type == indirect_branch_unset)
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@@ -4659,6 +4672,19 @@ ix86_set_indirect_branch_type (tree fndecl)
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}
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else
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cfun->machine->function_return_type = ix86_function_return;
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+
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+ /* -mcmodel=large is not compatible with -mfunction-return=thunk
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+ nor -mfunction-return=thunk-extern. */
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+ if ((ix86_cmodel == CM_LARGE || ix86_cmodel == CM_LARGE_PIC)
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+ && ((cfun->machine->function_return_type
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+ == indirect_branch_thunk_extern)
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+ || (cfun->machine->function_return_type
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+ == indirect_branch_thunk)))
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+ error ("%<-mfunction-return=%s%> and %<-mcmodel=large%> are not "
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+ "compatible",
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+ ((cfun->machine->function_return_type
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+ == indirect_branch_thunk_extern)
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+ ? "thunk-extern" : "thunk"));
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}
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}
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diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
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index 4a365c7..7b33803 100644
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--- a/gcc/doc/invoke.texi
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+++ b/gcc/doc/invoke.texi
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@@ -14659,6 +14659,11 @@ to external call and return thunk provided in a separate object file.
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You can control this behavior for a specific function by using the
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function attribute @code{indirect_branch}. @xref{Function Attributes}.
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+Note that @option{-mcmodel=large} is incompatible with
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+@option{-mindirect-branch=thunk} nor
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+@option{-mindirect-branch=thunk-extern} since the thunk function may
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+not be reachable in large code model.
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+
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@item -mfunction-return=@var{choice}
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@opindex -mfunction-return
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Convert function return with @var{choice}. The default is @samp{keep},
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@@ -14670,6 +14675,11 @@ object file. You can control this behavior for a specific function by
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using the function attribute @code{function_return}.
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@xref{Function Attributes}.
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+Note that @option{-mcmodel=large} is incompatible with
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+@option{-mfunction-return=thunk} nor
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+@option{-mfunction-return=thunk-extern} since the thunk function may
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+not be reachable in large code model.
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+
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@item -mindirect-branch-register
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@opindex -mindirect-branch-register
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Force indirect call and jump via register.
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diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-10.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-10.c
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new file mode 100644
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index 0000000..a0674bd
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-10.c
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@@ -0,0 +1,7 @@
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+/* { dg-do compile { target { lp64 } } } */
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+/* { dg-options "-O2 -mindirect-branch=thunk-inline -mfunction-return=keep -mcmodel=large" } */
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+
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+void
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+bar (void)
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+{
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+}
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diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-8.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-8.c
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new file mode 100644
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index 0000000..7a80a89
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-8.c
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@@ -0,0 +1,7 @@
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+/* { dg-do compile { target { lp64 } } } */
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+/* { dg-options "-O2 -mindirect-branch=thunk -mfunction-return=keep -mcmodel=large" } */
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+
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+void
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+bar (void)
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+{ /* { dg-error "'-mindirect-branch=thunk' and '-mcmodel=large' are not compatible" } */
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+}
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diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-9.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-9.c
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new file mode 100644
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index 0000000..d4d45c5
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-9.c
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@@ -0,0 +1,7 @@
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+/* { dg-do compile { target { lp64 } } } */
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+/* { dg-options "-O2 -mindirect-branch=thunk-extern -mfunction-return=keep -mcmodel=large" } */
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+
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+void
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+bar (void)
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+{ /* { dg-error "'-mindirect-branch=thunk-extern' and '-mcmodel=large' are not compatible" } */
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+}
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diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-10.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-10.c
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new file mode 100644
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index 0000000..3a2aead
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-10.c
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@@ -0,0 +1,9 @@
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+/* { dg-do compile { target { lp64 } } } */
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+/* { dg-options "-O2 -mindirect-branch=keep -mfunction-return=keep -mcmodel=large" } */
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+/* { dg-additional-options "-fPIC" { target fpic } } */
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+
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+__attribute__ ((indirect_branch("thunk-extern")))
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+void
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+bar (void)
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+{ /* { dg-error "'-mindirect-branch=thunk-extern' and '-mcmodel=large' are not compatible" } */
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+}
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diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-11.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-11.c
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new file mode 100644
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index 0000000..8e52f03
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-11.c
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@@ -0,0 +1,9 @@
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+/* { dg-do compile { target { lp64 } } } */
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+/* { dg-options "-O2 -mindirect-branch=keep -mfunction-return=keep -mcmodel=large" } */
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+/* { dg-additional-options "-fPIC" { target fpic } } */
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+
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+__attribute__ ((indirect_branch("thunk-inline")))
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+void
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+bar (void)
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+{
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+}
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diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-9.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-9.c
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new file mode 100644
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index 0000000..bdaa4f6
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-9.c
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@@ -0,0 +1,9 @@
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+/* { dg-do compile { target { lp64 } } } */
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+/* { dg-options "-O2 -mindirect-branch=keep -mfunction-return=keep -mcmodel=large" } */
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+/* { dg-additional-options "-fPIC" { target fpic } } */
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+
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+__attribute__ ((indirect_branch("thunk")))
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+void
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+bar (void)
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+{ /* { dg-error "'-mindirect-branch=thunk' and '-mcmodel=large' are not compatible" } */
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+}
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diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-17.c b/gcc/testsuite/gcc.target/i386/ret-thunk-17.c
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new file mode 100644
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index 0000000..0605e2c
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-17.c
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@@ -0,0 +1,7 @@
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+/* { dg-do compile { target { lp64 } } } */
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+/* { dg-options "-O2 -mfunction-return=thunk -mindirect-branch=keep -mcmodel=large" } */
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+
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+void
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+bar (void)
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+{ /* { dg-error "'-mfunction-return=thunk' and '-mcmodel=large' are not compatible" } */
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+}
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diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-18.c b/gcc/testsuite/gcc.target/i386/ret-thunk-18.c
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new file mode 100644
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index 0000000..307019d
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-18.c
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@@ -0,0 +1,8 @@
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+/* { dg-do compile { target { lp64 } } } */
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+/* { dg-options "-O2 -mfunction-return=thunk-extern -mindirect-branch=keep -mcmodel=large" } */
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+/* { dg-additional-options "-fPIC" { target fpic } } */
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+
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+void
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+bar (void)
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+{ /* { dg-error "'-mfunction-return=thunk-extern' and '-mcmodel=large' are not compatible" } */
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+}
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diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-19.c b/gcc/testsuite/gcc.target/i386/ret-thunk-19.c
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new file mode 100644
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index 0000000..772617f
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-19.c
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@@ -0,0 +1,8 @@
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+/* { dg-do compile { target { lp64 } } } */
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+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=keep -mcmodel=large" } */
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+
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+__attribute__ ((function_return("thunk")))
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+void
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+bar (void)
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+{ /* { dg-error "'-mfunction-return=thunk' and '-mcmodel=large' are not compatible" } */
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+}
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diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-20.c b/gcc/testsuite/gcc.target/i386/ret-thunk-20.c
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new file mode 100644
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index 0000000..1e9f9bd
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-20.c
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@@ -0,0 +1,9 @@
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+/* { dg-do compile { target { lp64 } } } */
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+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=keep -mcmodel=large" } */
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+/* { dg-additional-options "-fPIC" { target fpic } } */
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+
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+__attribute__ ((function_return("thunk-extern")))
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+void
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+bar (void)
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+{ /* { dg-error "'-mfunction-return=thunk-extern' and '-mcmodel=large' are not compatible" } */
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+}
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diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-21.c b/gcc/testsuite/gcc.target/i386/ret-thunk-21.c
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new file mode 100644
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index 0000000..eea07f7
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/i386/ret-thunk-21.c
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@@ -0,0 +1,9 @@
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+/* { dg-do compile { target { lp64 } } } */
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+/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=keep -mcmodel=large" } */
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+/* { dg-additional-options "-fPIC" { target fpic } } */
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+
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+__attribute__ ((function_return("thunk-inline")))
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+void
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+bar (void)
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+{
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+}
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