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84a719b414
Summary: r347747 added support for clustering mem ops with FI base operands including support for fixed stack objects in shouldClusterFI, but apparently this was never tested. This patch fixes shouldClusterFI to work with scaled as well as unscaled load/store instructions, and fixes the ordering of memory ops in MemOpInfo::operator< to ensure that memory addresses always increase, regardless of which direction the stack grows. Subscribers: MatzeB, kristof.beyls, hiraditya, javed.absar, arphaman, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D71334
55 lines
2.3 KiB
LLVM
55 lines
2.3 KiB
LLVM
; RUN: llc -mcpu=cyclone -debug-only=machine-scheduler < %s 2>&1 | FileCheck %s --check-prefixes=COMMON,SDAG
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; RUN: llc -mcpu=cyclone -global-isel -debug-only=machine-scheduler < %s 2>&1 | FileCheck %s --check-prefixes=COMMON,GISEL
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; REQUIRES: asserts
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "arm64-apple-ios7.0.0"
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define void @caller2(i8* %a0, i8* %a1, i8* %a2, i8* %a3, i8* %a4, i8* %a5, i8* %a6, i8* %a7, i8* %a8, i8* %a9) {
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entry:
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tail call void @callee2(i8* %a1, i8* %a2, i8* %a3, i8* %a4, i8* %a5, i8* %a6, i8* %a7, i8* %a8, i8* %a9, i8* %a0)
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ret void
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}
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declare void @callee2(i8*, i8*, i8*, i8*, i8*,
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i8*, i8*, i8*, i8*, i8*)
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; Make sure there is a dependence between the load and store to the same stack
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; location during a tail call. Tail calls clobber the incoming argument area and
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; therefore it is not safe to assume argument locations are invariant.
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; PR23459 has a test case that we where miscompiling because of this at the
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; time.
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; COMMON: Frame Objects
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; COMMON: fi#-4: {{.*}} fixed, at location [SP+8]
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; COMMON: fi#-3: {{.*}} fixed, at location [SP]
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; COMMON: fi#-2: {{.*}} fixed, at location [SP+8]
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; COMMON: fi#-1: {{.*}} fixed, at location [SP]
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; The order that these appear in differes in GISel than SDAG, but the
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; dependency relationship still holds.
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; COMMON: [[VRA:%.*]]:gpr64 = LDRXui %fixed-stack.3
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; COMMON: [[VRB:%.*]]:gpr64 = LDRXui %fixed-stack.2
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; SDAG: STRXui %{{.*}}, %fixed-stack.0
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; SDAG: STRXui [[VRB]]{{[^,]*}}, %fixed-stack.1
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; GISEL: STRXui [[VRB]]{{[^,]*}}, %fixed-stack.1
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; GISEL: STRXui %{{.*}}, %fixed-stack.0
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; Make sure that there is an dependence edge between fi#-2 and fi#-4.
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; Without this edge the scheduler would be free to move the store accross the load.
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; COMMON: {{^SU(.*)}}: [[VRB]]:gpr64 = LDRXui %fixed-stack.2
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; COMMON-NOT: {{^SU(.*)}}:
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; COMMON: Successors:
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; COMMON: SU([[DEPSTOREB:.*]]): Ord Latency=0
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; COMMON: SU([[DEPSTOREA:.*]]): Ord Latency=0
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; GlobalISel outputs DEPSTOREB before DEPSTOREA, but the dependency relationship
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; still holds.
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; SDAG: SU([[DEPSTOREA]]): STRXui %{{.*}}, %fixed-stack.0
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; SDAG: SU([[DEPSTOREB]]): STRXui %{{.*}}, %fixed-stack.1
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; GISEL: SU([[DEPSTOREB]]): STRXui %{{.*}}, %fixed-stack.0
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; GISEL: SU([[DEPSTOREA]]): STRXui %{{.*}}, %fixed-stack.1
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