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llvm-mirror/test/CodeGen/X86/sret-implicit.ll

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X86 ABI fix for return values > 24 bytes. The return value's address must be returned in %rax. i.e. the callee needs to copy the sret argument (%rdi) into the return value (%rax). This probably won't manifest as a bug when the caller is LLVM-compiled code. But it is an ABI guarantee and tools expect it. llvm-svn: 228321
2015-02-05 19:09:05 +01:00
; RUN: llc -mtriple=x86_64-apple-darwin8 < %s | FileCheck %s
; RUN: llc -mtriple=x86_64-pc-linux < %s | FileCheck %s
[RegisterCoalescer] Refine the terminal rule to still consider the terminal nodes. When a node is terminal it is pushed at the end of the list of the copies to coalesce instead of being completely ignored. In effect, this reduces its priority over non-terminal nodes. Because of that, we do not miss the rematerialization opportunities, nor the copies that can be merged with more complex, than the terminal rule, interference checks. Related to PR22768. llvm-svn: 233395
2015-03-27 19:37:15 +01:00
; RUN: llc -mtriple=x86_64-apple-darwin8 -terminal-rule < %s | FileCheck %s
; RUN: llc -mtriple=x86_64-pc-linux -terminal-rule < %s | FileCheck %s
X86 ABI fix for return values > 24 bytes. The return value's address must be returned in %rax. i.e. the callee needs to copy the sret argument (%rdi) into the return value (%rax). This probably won't manifest as a bug when the caller is LLVM-compiled code. But it is an ABI guarantee and tools expect it. llvm-svn: 228321
2015-02-05 19:09:05 +01:00
; CHECK-LABEL: return32
; CHECK-DAG: movq $0, (%rdi)
; CHECK-DAG: movq %rdi, %rax
; CHECK: retq
define i256 @return32() {
ret i256 0
}
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