mirror of
https://github.com/capstone-engine/llvm-capstone.git
synced 2025-05-13 17:37:00 +00:00
329ef60f3e
Initial support for asm goto w/ outputs (D69876) only supported outputs along the "default" (aka "fallthrough") edge. We can support outputs along all edges by repeating the same pattern of stores along the indirect edges that we allready do for the default edge. One complication is that these indirect edges may be critical edges which would need to be split. Another issue is that mid-codgen of LLVM IR, the control flow graph might not reflect the control flow of the final function. To avoid this "chicken and the egg" problem assume that any given indirect edge may become a critical edge, and pro-actively split it. This is unnecessary if the edge does not become critical, but LLVM will optimize such cases via tail duplication. Fixes: https://github.com/llvm/llvm-project/issues/53562 Reviewed By: void Differential Revision: https://reviews.llvm.org/D136497
13 lines
497 B
C
13 lines
497 B
C
// RUN: rm -rf %t
|
|
// RUN: %clang_cc1 -fmodules -fno-implicit-modules -x c -I%S/Inputs/asm-goto -emit-module %S/Inputs/asm-goto/module.modulemap -fmodule-name=a -o %t/a.pcm
|
|
// RUN: %clang_cc1 -fmodules -fno-implicit-modules -x c -I%S/Inputs/asm-goto -emit-llvm -o - %s -fmodule-file=%t/a.pcm | FileCheck %s
|
|
#include "a.h"
|
|
|
|
// CHECK-LABEL: define {{.*}} @foo(
|
|
// CHECK: callbr {{.*}} "=r,!i{{.*}}()
|
|
// CHECK-NEXT: to label %asm.fallthrough [label %indirect.split]
|
|
|
|
int bar(void) {
|
|
return foo();
|
|
}
|