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llvm-6502/test/CodeGen/X86/vastart-defs-eflags.ll

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Revert "Revert "Mark vastart_save_xmm_regs as changing EFLAGS"" This reverts commit r197481, recommiting r197469 with an extra fix. The vastart_save_xmm_regs pseudo-instruction expands to a test and a branch, so it modifies EFLAGS. Mark it so, or else the scheduler might place it in the middle of another test+branch. This fixes a bug exposed by r192750, which changed the initial scheduler to source-order as part of enabling the MI Scheduler for X86. This re-commit changes the VASTART_SAVE_XMM_REGS custom inserter not to try to save %flags, and adds a test that catches the bad behavior of r197469. <rdar://problem/15627766> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197503 91177308-0d34-0410-b5e6-96231b3b80d8
2013-12-17 15:54:45 +00:00
; RUN: llc %s -o - | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.10.0"
; Check that vastart handling doesn't get between testb and je for the branch.
define i32 @check_flag(i32 %flags, ...) nounwind {
entry:
; CHECK: {{^}} testb $2, %bh
; CHECK-NOT: test
; CHECK: {{^}} je
%and = and i32 %flags, 512
%tobool = icmp eq i32 %and, 0
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
ARM / x86_64 varargs: Don't save regparms in prologue without va_start There's no need to do this if the user doesn't call va_start. In the future, we're going to have thunks that forward these register parameters with musttail calls, and they won't need these spills for handling va_start. Most of the test suite changes are adding va_start calls to existing tests to keep things working. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216294 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-22 21:59:26 +00:00
call void @llvm.va_start(i8* null)
Revert "Revert "Mark vastart_save_xmm_regs as changing EFLAGS"" This reverts commit r197481, recommiting r197469 with an extra fix. The vastart_save_xmm_regs pseudo-instruction expands to a test and a branch, so it modifies EFLAGS. Mark it so, or else the scheduler might place it in the middle of another test+branch. This fixes a bug exposed by r192750, which changed the initial scheduler to source-order as part of enabling the MI Scheduler for X86. This re-commit changes the VASTART_SAVE_XMM_REGS custom inserter not to try to save %flags, and adds a test that catches the bad behavior of r197469. <rdar://problem/15627766> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197503 91177308-0d34-0410-b5e6-96231b3b80d8
2013-12-17 15:54:45 +00:00
br label %if.end
if.end: ; preds = %entry, %if.then
%hasflag = phi i32 [ 1, %if.then ], [ 0, %entry ]
ret i32 %hasflag
}
ARM / x86_64 varargs: Don't save regparms in prologue without va_start There's no need to do this if the user doesn't call va_start. In the future, we're going to have thunks that forward these register parameters with musttail calls, and they won't need these spills for handling va_start. Most of the test suite changes are adding va_start calls to existing tests to keep things working. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216294 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-22 21:59:26 +00:00
declare void @llvm.va_start(i8*) nounwind
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