diff options
| -rw-r--r-- | gcc/config/sparc/sparc.cc | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/gcc/config/sparc/sparc.cc b/gcc/config/sparc/sparc.cc index aca925b..a475373 100644 --- a/gcc/config/sparc/sparc.cc +++ b/gcc/config/sparc/sparc.cc @@ -6050,6 +6050,9 @@ sparc_expand_prologue (void) } RTX_FRAME_RELATED_P (insn) = 1; + + /* Ensure no memory access is done before the frame is established. */ + emit_insn (gen_frame_blockage ()); } else { @@ -6064,13 +6067,7 @@ sparc_expand_prologue (void) /* %sp is not the CFA register anymore. */ emit_insn (gen_stack_pointer_inc (GEN_INT (4096 - size))); - /* Make sure no %fp-based store is issued until after the frame is - established. The offset between the frame pointer and the stack - pointer is calculated relative to the value of the stack pointer - at the end of the function prologue, and moving instructions that - access the stack via the frame pointer between the instructions - that decrement the stack pointer could result in accessing the - register window save area, which is volatile. */ + /* Likewise. */ emit_insn (gen_frame_blockage ()); } else @@ -6166,8 +6163,8 @@ sparc_flat_expand_prologue (void) } RTX_FRAME_RELATED_P (insn) = 1; - /* Ensure nothing is scheduled until after the frame is established. */ - emit_insn (gen_blockage ()); + /* Ensure no memory access is done before the frame is established. */ + emit_insn (gen_frame_blockage ()); if (frame_pointer_needed) { @@ -6254,6 +6251,9 @@ sparc_expand_epilogue (bool for_eh) ; /* do nothing. */ else if (sparc_leaf_function_p) { + /* Ensure no memory access is done after the frame is destroyed. */ + emit_insn (gen_frame_blockage ()); + if (size <= 4096) emit_insn (gen_stack_pointer_inc (GEN_INT (size))); else if (size <= 8192) @@ -6304,15 +6304,15 @@ sparc_flat_expand_epilogue (bool for_eh) ; /* do nothing. */ else if (frame_pointer_needed) { - /* Make sure the frame is destroyed after everything else is done. */ - emit_insn (gen_blockage ()); + /* Ensure no memory access is done after the frame is destroyed. */ + emit_insn (gen_frame_blockage ()); emit_move_insn (stack_pointer_rtx, gen_rtx_REG (Pmode, 1)); } else { /* Likewise. */ - emit_insn (gen_blockage ()); + emit_insn (gen_frame_blockage ()); if (size <= 4096) emit_insn (gen_stack_pointer_inc (GEN_INT (size))); |