fc26ab36a2
The merged store touches memory for other underlying objects, so mapping the merged store to the first underlying object is not correct. For example in https://github.com/llvm/llvm-project/issues/60744, the merged store is not correctly analyzed as dependent with memory operations which are also part of the merged store. Fixes #60744 Reviewed By: foad Differential Revision: https://reviews.llvm.org/D144711
49 lines
1.8 KiB
LLVM
49 lines
1.8 KiB
LLVM
; RUN: llc < %s -mtriple=i686-unknown-linux-android24 -verify-machineinstrs \
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; RUN: -debug-only=machine-scheduler -o - 2>&1 | FileCheck %s
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; REQUIRES: asserts
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;; MOVUPSmr is a merged store from stack objects %ir.arg1, %ir.arg2, %ir.arg3,
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;; %ir.arg4.
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;; Check that the merged store has dependency with %ir.arg4.
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; CHECK: ********** MI Scheduling **********
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; CHECK-LABEL: f:%bb.0 bb
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; CHECK: SU([[ARG4:[0-9]+]]):{{.*}}MOV32rm{{.*}}load (s32) from %ir.arg4
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; CHECK: SU([[#WIDEN:]]):{{.*}}MOVUPSmr{{.*}}store (s128) into
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; CHECK: Predecessors:
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; CHECK: SU([[ARG4]]):{{.*}}Memory
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; CHECK: SU([[#WIDEN+1]])
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;
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define void @f(ptr %arg, ptr byval(ptr) %arg1, ptr byval(ptr) %arg2, ptr byval(ptr) %arg3, ptr byval(ptr) %arg4) #0 {
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bb:
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%inst = alloca ptr, align 4
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%inst5 = alloca ptr, align 4
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%inst6 = alloca ptr, align 4
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%inst7 = alloca ptr, align 4
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%inst9 = load ptr, ptr %arg1, align 4
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store ptr null, ptr %arg1, align 4
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store ptr %inst9, ptr %inst, align 4
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%inst10 = load ptr, ptr %arg2, align 4
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store ptr null, ptr %arg2, align 4
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store ptr %inst10, ptr %inst5, align 4
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%inst11 = load ptr, ptr %arg3, align 4
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store ptr null, ptr %arg3, align 4
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store ptr %inst11, ptr %inst6, align 4
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%inst12 = load ptr, ptr %arg4, align 4
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store ptr null, ptr %arg4, align 4
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store ptr %inst12, ptr %inst7, align 4
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call void @g(ptr %arg, ptr byval(ptr) %inst, ptr byval(ptr) %inst5, ptr byval(ptr) %inst6, ptr byval(ptr) %inst7)
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call void @h(ptr %arg4)
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call void @h(ptr %arg3)
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call void @h(ptr %arg2)
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call void @h(ptr %arg1)
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ret void
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}
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declare void @g(ptr, ptr, ptr, ptr, ptr)
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declare void @h(ptr)
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attributes #0 = { optsize "frame-pointer"="non-leaf" "target-cpu"="i686" "target-features"="+sse,+sse2" "tune-cpu"="generic" }
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