Revert r269828 "X86: Avoid using _chkstk when lowering WIN_ALLOCA instructions"

Seems to have broken the Windows ASan bot. Reverting while investigating.

llvm-svn: 269833

1 files changed, 0 insertions, 153 deletions

diff --git a/llvm/test/CodeGen/X86/win-alloca-expander.ll b/llvm/test/CodeGen/X86/win-alloca-expander.ll
deleted file mode 100644
index 0dca72cae1a..00000000000
--- a/llvm/test/CodeGen/X86/win-alloca-expander.ll
+++ /dev/null
@@ -1,153 +0,0 @@
-; RUN: llc < %s -mtriple=i686-pc-win32 | FileCheck %s
-
-%struct.S = type { [1024 x i8] }
-%struct.T = type { [3000 x i8] }
-%struct.U = type { [10000 x i8] }
-
-define void @basics() {
-; CHECK-LABEL: basics:
-entry:
-  br label %bb1
-
-; Allocation move sizes should have been removed.
-; CHECK-NOT: movl $1024
-; CHECK-NOT: movl $3000
-
-bb1:
-  %p0 = alloca %struct.S
-; The allocation is small enough not to require stack probing, but the %esp
-; offset after the prologue is not known, so the stack must be touched before
-; the pointer is adjusted.
-; CHECK: pushl %eax
-; CHECK: subl $1020, %esp
-
-  %saved_stack = tail call i8* @llvm.stacksave()
-
-  %p1 = alloca %struct.S
-; We know the %esp offset from above, so there is no need to touch the stack
-; before adjusting it.
-; CHECK: subl $1024, %esp
-
-  %p2 = alloca %struct.T
-; The offset is now 2048 bytes, so allocating a T must touch the stack again.
-; CHECK: pushl %eax
-; CHECK: subl $2996, %esp
-
-  call void @f(%struct.S* %p0)
-; CHECK: calll
-
-  %p3 = alloca %struct.T
-; The call above touched the stack, so there is room for a T object.
-; CHECK: subl $3000, %esp
-
-  %p4 = alloca %struct.U
-; The U object is large enough to require stack probing.
-; CHECK: movl $10000, %eax
-; CHECK: calll __chkstk
-
-  %p5 = alloca %struct.T
-; The stack probing above touched the tip of the stack, so there's room for a T.
-; CHECK: subl $3000, %esp
-
-  call void @llvm.stackrestore(i8* %saved_stack)
-  %p6 = alloca %struct.S
-; The stack restore means we lose track of the stack pointer and must probe.
-; CHECK: pushl %eax
-; CHECK: subl $1020, %esp
-
-; Use the pointers so they're not optimized away.
-  call void @f(%struct.S* %p1)
-  call void @g(%struct.T* %p2)
-  call void @g(%struct.T* %p3)
-  call void @h(%struct.U* %p4)
-  call void @g(%struct.T* %p5)
-  ret void
-}
-
-define void @loop() {
-; CHECK-LABEL: loop:
-entry:
-  br label %bb1
-
-bb1:
-  %p1 = alloca %struct.S
-; The entry offset is unknown; touch-and-sub.
-; CHECK: pushl %eax
-; CHECK: subl $1020, %esp
-  br label %loop1
-
-loop1:
-  %i1 = phi i32 [ 10, %bb1 ], [ %dec1, %loop1 ]
-  %p2 = alloca %struct.S
-; We know the incoming offset from bb1, but from the back-edge, we assume the
-; worst, and therefore touch-and-sub to allocate.
-; CHECK: pushl %eax
-; CHECK: subl $1020, %esp
-  %dec1 = sub i32 %i1, 1
-  %cmp1 = icmp sgt i32 %i1, 0
-  br i1 %cmp1, label %loop1, label %end
-; CHECK: decl
-; CHECK: jg
-
-end:
-  call void @f(%struct.S* %p1)
-  call void @f(%struct.S* %p2)
-  ret void
-}
-
-define void @probe_size_attribute() "stack-probe-size"="512" {
-; CHECK-LABEL: probe_size_attribute:
-entry:
-  br label %bb1
-
-bb1:
-  %p0 = alloca %struct.S
-; The allocation would be small enough not to require probing, if it wasn't
-; for the stack-probe-size attribute.
-; CHECK: movl $1024, %eax
-; CHECK: calll __chkstk
-  call void @f(%struct.S* %p0)
-  ret void
-}
-
-define void @cfg(i1 %x, i1 %y) {
-; Test that the blocks are analyzed in the correct order.
-; CHECK-LABEL: cfg:
-entry:
-  br i1 %x, label %bb1, label %bb2
-
-bb1:
-  %p1 = alloca %struct.S
-; CHECK: pushl %eax
-; CHECK: subl $1020, %esp
-  br label %bb3
-bb2:
-  %p2 = alloca %struct.T
-; CHECK: pushl %eax
-; CHECK: subl $2996, %esp
-  br label %bb3
-
-bb3:
-  br i1 %y, label %bb4, label %bb5
-
-bb4:
-  %p4 = alloca %struct.S
-; CHECK: subl $1024, %esp
-  call void @f(%struct.S* %p4)
-  ret void
-
-bb5:
-  %p5 = alloca %struct.T
-; CHECK: pushl %eax
-; CHECK: subl $2996, %esp
-  call void @g(%struct.T* %p5)
-  ret void
-}
-
-
-declare void @f(%struct.S*)
-declare void @g(%struct.T*)
-declare void @h(%struct.U*)
-
-declare i8* @llvm.stacksave()
-declare void @llvm.stackrestore(i8*)