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llvm-mirror/test/Transforms/DeadStoreElimination/merge-stores-big-endian.ll
Eric Christopher a62270de2c Revert "Temporarily Revert "Add basic loop fusion pass."" 
The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552
2019-04-17 04:52:47 +00:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -dse -enable-dse-partial-store-merging -S < %s | FileCheck %s
target datalayout = "E-m:e-i64:64-i128:128-n32:64-S128"
define void @byte_by_byte_replacement(i32 *%ptr) {
; CHECK-LABEL: @byte_by_byte_replacement(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i32 151653132, i32* [[PTR:%.*]]
; CHECK-NEXT: ret void
;
entry:
;; This store's value should be modified as it should be better to use one
;; larger store than several smaller ones.
;; store will turn into 0x090A0B0C == 151653132
store i32 305419896, i32* %ptr ; 0x12345678
%bptr = bitcast i32* %ptr to i8*
%bptr1 = getelementptr inbounds i8, i8* %bptr, i64 1
%bptr2 = getelementptr inbounds i8, i8* %bptr, i64 2
%bptr3 = getelementptr inbounds i8, i8* %bptr, i64 3
;; We should be able to merge these four stores with the i32 above
; value (and bytes) stored before ; 0x12345678
store i8 9, i8* %bptr ; 09
store i8 10, i8* %bptr1 ; 0A
store i8 11, i8* %bptr2 ; 0B
store i8 12, i8* %bptr3 ; 0C
; 0x090A0B0C
ret void
}
define void @word_replacement(i64 *%ptr) {
; CHECK-LABEL: @word_replacement(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i64 72638273700655232, i64* [[PTR:%.*]]
; CHECK-NEXT: ret void
;
entry:
store i64 72623859790382856, i64* %ptr ; 0x0102030405060708
%wptr = bitcast i64* %ptr to i16*
%wptr1 = getelementptr inbounds i16, i16* %wptr, i64 1
%wptr2 = getelementptr inbounds i16, i16* %wptr, i64 2
%wptr3 = getelementptr inbounds i16, i16* %wptr, i64 3
;; We should be able to merge these two stores with the i64 one above
; value (and bytes) stored before ; 0x0102030405060708
store i16 4128, i16* %wptr1 ; 1020
store i16 28800, i16* %wptr3 ; 7080
; 0x0102102005067080
ret void
}
define void @differently_sized_replacements(i64 *%ptr) {
; CHECK-LABEL: @differently_sized_replacements(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i64 289077004501059343, i64* [[PTR:%.*]]
; CHECK-NEXT: ret void
;
entry:
store i64 579005069656919567, i64* %ptr ; 0x08090a0b0c0d0e0f
%bptr = bitcast i64* %ptr to i8*
%bptr6 = getelementptr inbounds i8, i8* %bptr, i64 6
%wptr = bitcast i64* %ptr to i16*
%wptr2 = getelementptr inbounds i16, i16* %wptr, i64 2
%dptr = bitcast i64* %ptr to i32*
;; We should be able to merge all these stores with the i64 one above
; value (and bytes) stored before ; 0x08090a0b0c0d0e0f
store i8 7, i8* %bptr6 ; 07
store i16 1541, i16* %wptr2 ; 0605
store i32 67305985, i32* %dptr ; 04030201
; 0x040302010605070f
ret void
}
define void @multiple_replacements_to_same_byte(i64 *%ptr) {
; CHECK-LABEL: @multiple_replacements_to_same_byte(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i64 289077004602248719, i64* [[PTR:%.*]]
; CHECK-NEXT: ret void
;
entry:
store i64 579005069656919567, i64* %ptr ; 0x08090a0b0c0d0e0f
%bptr = bitcast i64* %ptr to i8*
%bptr3 = getelementptr inbounds i8, i8* %bptr, i64 3
%wptr = bitcast i64* %ptr to i16*
%wptr1 = getelementptr inbounds i16, i16* %wptr, i64 1
%dptr = bitcast i64* %ptr to i32*
;; We should be able to merge all these stores with the i64 one above
; value (and bytes) stored before ; 0x08090a0b0c0d0e0f
store i8 7, i8* %bptr3 ; 07
store i16 1541, i16* %wptr1 ; 0605
store i32 67305985, i32* %dptr ; 04030201
; 0x040302010c0d0e0f
ret void
}
define void @merged_merges(i64 *%ptr) {
; CHECK-LABEL: @merged_merges(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i64 289081428418563599, i64* [[PTR:%.*]]
; CHECK-NEXT: ret void
;
entry:
store i64 579005069656919567, i64* %ptr ; 0x08090a0b0c0d0e0f
%bptr = bitcast i64* %ptr to i8*
%bptr3 = getelementptr inbounds i8, i8* %bptr, i64 3
%wptr = bitcast i64* %ptr to i16*
%wptr1 = getelementptr inbounds i16, i16* %wptr, i64 1
%dptr = bitcast i64* %ptr to i32*
;; We should be able to merge all these stores with the i64 one above
; value (not bytes) stored before ; 0x08090a0b0c0d0e0f
store i32 67305985, i32* %dptr ; 04030201
store i16 1541, i16* %wptr1 ; 0605
store i8 7, i8* %bptr3 ; 07
; 0x040306070c0d0e0f
ret void
}
define signext i8 @shouldnt_merge_since_theres_a_full_overlap(i64 *%ptr) {
; CHECK-LABEL: @shouldnt_merge_since_theres_a_full_overlap(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[BPTR:%.*]] = bitcast i64* [[PTR:%.*]] to i8*
; CHECK-NEXT: [[BPTRM1:%.*]] = getelementptr inbounds i8, i8* [[BPTR]], i64 -1
; CHECK-NEXT: [[BPTR3:%.*]] = getelementptr inbounds i8, i8* [[BPTR]], i64 3
; CHECK-NEXT: [[DPTR:%.*]] = bitcast i8* [[BPTRM1]] to i32*
; CHECK-NEXT: [[QPTR:%.*]] = bitcast i8* [[BPTR3]] to i64*
; CHECK-NEXT: store i32 1234, i32* [[DPTR]], align 1
; CHECK-NEXT: store i64 5678, i64* [[QPTR]], align 1
; CHECK-NEXT: ret i8 0
;
entry:
store i64 0, i64* %ptr
%bptr = bitcast i64* %ptr to i8*
%bptrm1 = getelementptr inbounds i8, i8* %bptr, i64 -1
%bptr3 = getelementptr inbounds i8, i8* %bptr, i64 3
%dptr = bitcast i8* %bptrm1 to i32*
%qptr = bitcast i8* %bptr3 to i64*
store i32 1234, i32* %dptr, align 1
store i64 5678, i64* %qptr, align 1
ret i8 0
}
;; Test case from PR31777
%union.U = type { i64 }
define void @foo(%union.U* nocapture %u) {
; CHECK-LABEL: @foo(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[I:%.*]] = getelementptr inbounds [[UNION_U:%.*]], %union.U* [[U:%.*]], i64 0, i32 0
; CHECK-NEXT: store i64 11821949021847552, i64* [[I]], align 8
; CHECK-NEXT: ret void
;
entry:
%i = getelementptr inbounds %union.U, %union.U* %u, i64 0, i32 0
store i64 0, i64* %i, align 8
%s = bitcast %union.U* %u to i16*
store i16 42, i16* %s, align 8
ret void
}
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