1*9880d681SAndroid Build Coastguard Worker; REQUIRES: asserts 2*9880d681SAndroid Build Coastguard Worker; RUN: llc -march=x86-64 -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck -check-prefix=X86 %s 3*9880d681SAndroid Build Coastguard Worker; RUN: llc -march=x86-64 -mtriple=x86_64-unknown-linux-gnu -debug-only=isel < %s 2>&1 | FileCheck -check-prefix=DBGDAG %s 4*9880d681SAndroid Build Coastguard Worker 5*9880d681SAndroid Build Coastguard Worker; It's OK to merge the load / store of the first 2 components, but 6*9880d681SAndroid Build Coastguard Worker; they must not be placed on the same chain after merging. 7*9880d681SAndroid Build Coastguard Worker 8*9880d681SAndroid Build Coastguard Worker; X86-LABEL: {{^}}merge_store_partial_overlap_load: 9*9880d681SAndroid Build Coastguard Worker; X86-DAG: movzwl ([[BASEREG:%[a-z]+]]), %e[[LO2:[a-z]+]] 10*9880d681SAndroid Build Coastguard Worker; X86-DAG: movb 2([[BASEREG]]), [[HI1:%[a-z]+]] 11*9880d681SAndroid Build Coastguard Worker 12*9880d681SAndroid Build Coastguard Worker; X86-NEXT: movw %[[LO2]], 1([[BASEREG]]) 13*9880d681SAndroid Build Coastguard Worker; X86-NEXT: movb [[HI1]], 3([[BASEREG]]) 14*9880d681SAndroid Build Coastguard Worker; X86-NEXT: retq 15*9880d681SAndroid Build Coastguard Worker 16*9880d681SAndroid Build Coastguard Worker; DBGDAG-LABEL: Optimized lowered selection DAG: BB#0 'merge_store_partial_overlap_load:' 17*9880d681SAndroid Build Coastguard Worker; DBGDAG: [[ENTRYTOKEN:t[0-9]+]]: ch = EntryToken 18*9880d681SAndroid Build Coastguard Worker; DBGDAG-DAG: [[BASEPTR:t[0-9]+]]: i64,ch = CopyFromReg [[ENTRYTOKEN]], 19*9880d681SAndroid Build Coastguard Worker; DBGDAG-DAG: [[ADDPTR:t[0-9]+]]: i64 = add [[BASEPTR]], Constant:i64<2> 20*9880d681SAndroid Build Coastguard Worker 21*9880d681SAndroid Build Coastguard Worker; DBGDAG-DAG: [[LD2:t[0-9]+]]: i16,ch = load<LD2[%tmp81](align=1)> [[ENTRYTOKEN]], [[BASEPTR]], undef:i64 22*9880d681SAndroid Build Coastguard Worker; DBGDAG-DAG: [[LD1:t[0-9]+]]: i8,ch = load<LD1[%tmp12]> [[ENTRYTOKEN]], [[ADDPTR]], undef:i64 23*9880d681SAndroid Build Coastguard Worker 24*9880d681SAndroid Build Coastguard Worker; DBGDAG: [[LOADTOKEN:t[0-9]+]]: ch = TokenFactor [[LD2]]:1, [[LD1]]:1 25*9880d681SAndroid Build Coastguard Worker 26*9880d681SAndroid Build Coastguard Worker; DBGDAG-DAG: [[ST2:t[0-9]+]]: ch = store<ST2[%tmp10](align=1)> [[LOADTOKEN]], [[LD2]], t{{[0-9]+}}, undef:i64 27*9880d681SAndroid Build Coastguard Worker; DBGDAG-DAG: [[ST1:t[0-9]+]]: ch = store<ST1[%tmp14]> [[ST2]], [[LD1]], t{{[0-9]+}}, undef:i64 28*9880d681SAndroid Build Coastguard Worker; DBGDAG: X86ISD::RET_FLAG [[ST1]], 29*9880d681SAndroid Build Coastguard Worker 30*9880d681SAndroid Build Coastguard Worker; DBGDAG: Type-legalized selection DAG: BB#0 'merge_store_partial_overlap_load:' 31*9880d681SAndroid Build Coastguard Workerdefine void @merge_store_partial_overlap_load([4 x i8]* %tmp) { 32*9880d681SAndroid Build Coastguard Worker %tmp8 = getelementptr inbounds [4 x i8], [4 x i8]* %tmp, i32 0, i8 0 33*9880d681SAndroid Build Coastguard Worker %tmp10 = getelementptr inbounds [4 x i8], [4 x i8]* %tmp, i32 0, i8 1 34*9880d681SAndroid Build Coastguard Worker %tmp12 = getelementptr inbounds [4 x i8], [4 x i8]* %tmp, i32 0, i8 2 35*9880d681SAndroid Build Coastguard Worker %tmp14 = getelementptr [4 x i8], [4 x i8]* %tmp, i32 0, i8 3 36*9880d681SAndroid Build Coastguard Worker 37*9880d681SAndroid Build Coastguard Worker %tmp9 = load i8, i8* %tmp8, align 1 ; base + 0 38*9880d681SAndroid Build Coastguard Worker %tmp11 = load i8, i8* %tmp10, align 1 ; base + 1 39*9880d681SAndroid Build Coastguard Worker %tmp13 = load i8, i8* %tmp12, align 1 ; base + 2 40*9880d681SAndroid Build Coastguard Worker 41*9880d681SAndroid Build Coastguard Worker store i8 %tmp9, i8* %tmp10, align 1 ; base + 1 42*9880d681SAndroid Build Coastguard Worker store i8 %tmp11, i8* %tmp12, align 1 ; base + 2 43*9880d681SAndroid Build Coastguard Worker store i8 %tmp13, i8* %tmp14, align 1 ; base + 3 44*9880d681SAndroid Build Coastguard Worker 45*9880d681SAndroid Build Coastguard Worker; Should emit 46*9880d681SAndroid Build Coastguard Worker; load base + 0, base + 1 47*9880d681SAndroid Build Coastguard Worker; store base + 1, base + 2 48*9880d681SAndroid Build Coastguard Worker; load base + 2 49*9880d681SAndroid Build Coastguard Worker; store base + 3 50*9880d681SAndroid Build Coastguard Worker 51*9880d681SAndroid Build Coastguard Worker ret void 52*9880d681SAndroid Build Coastguard Worker} 53