mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-23 21:13:02 +02:00
1371bbfd83
We rely on HasOpaqueSPAdjustment not changing after we've calculated things based on it. Things like whether or not we can use 'rep;movs' to copy bytes around, that sort of thing. If it changes, invariants in the backend will quietly break. This situation arose when we had a call to memcpy *and* a COPY of the FLAGS register where we would attempt to reference local variables using %esi, a register that was clobbered by the 'rep;movs'. This fixes PR26124. llvm-svn: 257730
54 lines
1.5 KiB
LLVM
54 lines
1.5 KiB
LLVM
; RUN: llc < %s | FileCheck %s
|
|
target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
|
|
target triple = "i686-pc-windows-msvc18.0.0"
|
|
|
|
%struct.T = type { i64, [3 x i32] }
|
|
|
|
; Function Attrs: nounwind optsize
|
|
define void @f(i8* %p, i8* %q, i32* inalloca nocapture %unused) #0 {
|
|
entry:
|
|
%g = alloca %struct.T, align 8
|
|
%r = alloca i32, align 8
|
|
store i32 0, i32* %r, align 4
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %p, i8* %q, i32 24, i32 8, i1 false)
|
|
br label %while.body
|
|
|
|
while.body: ; preds = %while.body, %entry
|
|
%load = load i32, i32* %r, align 4
|
|
%dec = add nsw i32 %load, -1
|
|
store i32 %dec, i32* %r, align 4
|
|
call void @g(%struct.T* %g)
|
|
%tobool = icmp eq i32 %dec, 0
|
|
br i1 %tobool, label %while.end, label %while.body
|
|
|
|
while.end: ; preds = %while.body
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: argmemonly nounwind
|
|
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1) #1
|
|
|
|
declare void @g(%struct.T*)
|
|
|
|
; CHECK-LABEL: _f:
|
|
; CHECK: pushl %ebp
|
|
; CHECK: movl %esp, %ebp
|
|
; CHECK: andl $-8, %esp
|
|
; CHECK-NOT: movl %esp, %esi
|
|
; CHECK: rep;movsl
|
|
; CHECK: leal 8(%esp), %esi
|
|
|
|
; CHECK: decl (%esp)
|
|
; CHECK: seto %al
|
|
; CHECK: lahf
|
|
; CHECK: movl %eax, %edi
|
|
; CHECK: pushl %esi
|
|
; CHECK: calll _g
|
|
; CHECK: addl $4, %esp
|
|
; CHECK: movl %edi, %eax
|
|
; CHECK: addb $127, %al
|
|
; CHECK: sahf
|
|
|
|
attributes #0 = { nounwind optsize }
|
|
attributes #1 = { argmemonly nounwind }
|