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llvm-mirror/test/CodeGen/AVR/directmem.ll
Nirav Dave 6655b5e078 [DAGCombiner] If a TokenFactor would be merged into its user, consider the user later. 
Summary:
A number of optimizations are inhibited by single-use TokenFactors not
being merged into the TokenFactor using it. This makes we consider if
we can do the merge immediately.

Most tests changes here are due to the change in visitation causing
minor reorderings and associated reassociation of paired memory
operations.

CodeGen tests with non-reordering changes:

  X86/aligned-variadic.ll -- memory-based add folded into stored leaq
  value.

  X86/constant-combiners.ll -- Optimizes out overlap between stores.

  X86/pr40631_deadstore_elision -- folds constant byte store into
  preceding quad word constant store.

Reviewers: RKSimon, craig.topper, spatel, efriedma, courbet

Reviewed By: courbet

Subscribers: dylanmckay, sdardis, nemanjai, jvesely, nhaehnle, javed.absar, eraman, hiraditya, kbarton, jrtc27, atanasyan, jsji, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D59260

llvm-svn: 356068
2019-03-13 17:07:09 +00:00

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; RUN: llc -mattr=sram,addsubiw < %s -march=avr | FileCheck %s
@char = common global i8 0
@char.array = common global [3 x i8] zeroinitializer
@char.static = internal global i8 0
@int = common global i16 0
@int.array = common global [3 x i16] zeroinitializer
@int.static = internal global i16 0
@long = common global i32 0
@long.array = common global [3 x i32] zeroinitializer
@long.static = internal global i32 0
@longlong = common global i64 0
@longlong.array = common global [3 x i64] zeroinitializer
@longlong.static = internal global i64 0
define void @global8_store() {
; CHECK-LABEL: global8_store:
; CHECK: ldi [[REG:r[0-9]+]], 6
; CHECK: sts char, [[REG]]
store i8 6, i8* @char
ret void
}
define i8 @global8_load() {
; CHECK-LABEL: global8_load:
; CHECK: lds r24, char
%result = load i8, i8* @char
ret i8 %result
}
define void @array8_store() {
; CHECK-LABEL: array8_store:
; CHECK: ldi [[REG1:r[0-9]+]], 3
; CHECK: sts char.array+2, [[REG1]]
; CHECK: ldi [[REG3:r[0-9]+]], 1
; CHECK: ldi [[REG2:r[0-9]+]], 2
; CHECK: sts char.array+1, [[REG2]]
; CHECK: sts char.array, [[REG3]]
store i8 1, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @char.array, i32 0, i64 0)
store i8 2, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @char.array, i32 0, i64 1)
store i8 3, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @char.array, i32 0, i64 2)
ret void
}
define i8 @array8_load() {
; CHECK-LABEL: array8_load:
; CHECK: lds r24, char.array+2
%result = load i8, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @char.array, i32 0, i64 2)
ret i8 %result
}
define i8 @static8_inc() {
; CHECK-LABEL: static8_inc:
; CHECK: lds r24, char.static
; CHECK: inc r24
; CHECK: sts char.static, r24
%1 = load i8, i8* @char.static
%inc = add nsw i8 %1, 1
store i8 %inc, i8* @char.static
ret i8 %inc
}
define void @global16_store() {
; CHECK-LABEL: global16_store:
; CHECK: ldi [[REG1:r[0-9]+]], 187
; CHECK: ldi [[REG2:r[0-9]+]], 170
; CHECK: sts int+1, [[REG2]]
; CHECK: sts int, [[REG1]]
store i16 43707, i16* @int
ret void
}
define i16 @global16_load() {
; CHECK-LABEL: global16_load:
; CHECK: lds r24, int
; CHECK: lds r25, int+1
%result = load i16, i16* @int
ret i16 %result
}
define void @array16_store() {
; CHECK-LABEL: array16_store:
; CHECK: ldi [[REG1:r[0-9]+]], 221
; CHECK: ldi [[REG2:r[0-9]+]], 170
; CHECK: sts int.array+5, [[REG2]]
; CHECK: sts int.array+4, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 204
; CHECK: ldi [[REG2:r[0-9]+]], 170
; CHECK: sts int.array+3, [[REG2]]
; CHECK: sts int.array+2, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 187
; CHECK: ldi [[REG2:r[0-9]+]], 170
; CHECK: sts int.array+1, [[REG2]]
; CHECK: sts int.array, [[REG1]]
store i16 43707, i16* getelementptr inbounds ([3 x i16], [3 x i16]* @int.array, i32 0, i64 0)
store i16 43724, i16* getelementptr inbounds ([3 x i16], [3 x i16]* @int.array, i32 0, i64 1)
store i16 43741, i16* getelementptr inbounds ([3 x i16], [3 x i16]* @int.array, i32 0, i64 2)
ret void
}
define i16 @array16_load() {
; CHECK-LABEL: array16_load:
; CHECK: lds r24, int.array+4
; CHECK: lds r25, int.array+5
%result = load i16, i16* getelementptr inbounds ([3 x i16], [3 x i16]* @int.array, i32 0, i64 2)
ret i16 %result
}
define i16 @static16_inc() {
; CHECK-LABEL: static16_inc:
; CHECK: lds r24, int.static
; CHECK: lds r25, int.static+1
; CHECK: adiw r24, 1
; CHECK: sts int.static+1, r25
; CHECK: sts int.static, r24
%1 = load i16, i16* @int.static
%inc = add nsw i16 %1, 1
store i16 %inc, i16* @int.static
ret i16 %inc
}
define void @global32_store() {
; CHECK-LABEL: global32_store:
; CHECK: ldi [[REG1:r[0-9]+]], 187
; CHECK: ldi [[REG2:r[0-9]+]], 170
; CHECK: sts long+3, [[REG2]]
; CHECK: sts long+2, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 221
; CHECK: ldi [[REG2:r[0-9]+]], 204
; CHECK: sts long+1, [[REG2]]
; CHECK: sts long, [[REG1]]
store i32 2864434397, i32* @long
ret void
}
define i32 @global32_load() {
; CHECK-LABEL: global32_load:
; CHECK: lds r22, long
; CHECK: lds r23, long+1
; CHECK: lds r24, long+2
; CHECK: lds r25, long+3
%result = load i32, i32* @long
ret i32 %result
}
define void @array32_store() {
; CHECK-LABEL: array32_store:
; CHECK: ldi [[REG1:r[0-9]+]], 170
; CHECK: ldi [[REG2:r[0-9]+]], 153
; CHECK: sts long.array+11, [[REG2]]
; CHECK: sts long.array+10, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 204
; CHECK: ldi [[REG2:r[0-9]+]], 187
; CHECK: sts long.array+9, [[REG2]]
; CHECK: sts long.array+8, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 102
; CHECK: ldi [[REG2:r[0-9]+]], 85
; CHECK: sts long.array+7, [[REG2]]
; CHECK: sts long.array+6, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 136
; CHECK: ldi [[REG2:r[0-9]+]], 119
; CHECK: sts long.array+5, [[REG2]]
; CHECK: sts long.array+4, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 27
; CHECK: ldi [[REG2:r[0-9]+]], 172
; CHECK: sts long.array+3, [[REG2]]
; CHECK: sts long.array+2, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 68
; CHECK: ldi [[REG2:r[0-9]+]], 13
; CHECK: sts long.array+1, [[REG2]]
; CHECK: sts long.array, [[REG1]]
store i32 2887454020, i32* getelementptr inbounds ([3 x i32], [3 x i32]* @long.array, i32 0, i64 0)
store i32 1432778632, i32* getelementptr inbounds ([3 x i32], [3 x i32]* @long.array, i32 0, i64 1)
store i32 2578103244, i32* getelementptr inbounds ([3 x i32], [3 x i32]* @long.array, i32 0, i64 2)
ret void
}
define i32 @array32_load() {
; CHECK-LABEL: array32_load:
; CHECK: lds r22, long.array+8
; CHECK: lds r23, long.array+9
; CHECK: lds r24, long.array+10
; CHECK: lds r25, long.array+11
%result = load i32, i32* getelementptr inbounds ([3 x i32], [3 x i32]* @long.array, i32 0, i64 2)
ret i32 %result
}
define i32 @static32_inc() {
; CHECK-LABEL: static32_inc:
; CHECK: lds r22, long.static
; CHECK: lds r23, long.static+1
; CHECK: lds r24, long.static+2
; CHECK: lds r25, long.static+3
; CHECK: subi r22, 255
; CHECK: sbci r23, 255
; CHECK: sbci r24, 255
; CHECK: sbci r25, 255
; CHECK-DAG: sts long.static+3, r25
; CHECK-DAG: sts long.static+2, r24
; CHECK-DAG: sts long.static+1, r23
; CHECK-DAG: sts long.static, r22
%1 = load i32, i32* @long.static
%inc = add nsw i32 %1, 1
store i32 %inc, i32* @long.static
ret i32 %inc
}
define void @global64_store() {
; CHECK-LABEL: global64_store:
; CHECK: ldi [[REG1:r[0-9]+]], 34
; CHECK: ldi [[REG2:r[0-9]+]], 17
; CHECK: sts longlong+7, [[REG2]]
; CHECK: sts longlong+6, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 68
; CHECK: ldi [[REG2:r[0-9]+]], 51
; CHECK: sts longlong+5, [[REG2]]
; CHECK: sts longlong+4, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 102
; CHECK: ldi [[REG2:r[0-9]+]], 85
; CHECK: sts longlong+3, [[REG2]]
; CHECK: sts longlong+2, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 136
; CHECK: ldi [[REG2:r[0-9]+]], 119
; CHECK: sts longlong+1, [[REG2]]
; CHECK: sts longlong, [[REG1]]
store i64 1234605616436508552, i64* @longlong
ret void
}
define i64 @global64_load() {
; CHECK-LABEL: global64_load:
; CHECK: lds r18, longlong
; CHECK: lds r19, longlong+1
; CHECK: lds r20, longlong+2
; CHECK: lds r21, longlong+3
; CHECK: lds r22, longlong+4
; CHECK: lds r23, longlong+5
; CHECK: lds r24, longlong+6
; CHECK: lds r25, longlong+7
%result = load i64, i64* @longlong
ret i64 %result
}
define void @array64_store() {
; CHECK-LABEL: array64_store:
; CHECK: ldi [[REG1:r[0-9]+]], 34
; CHECK: ldi [[REG2:r[0-9]+]], 17
; CHECK: sts longlong.array+7, [[REG2]]
; CHECK: sts longlong.array+6, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 68
; CHECK: ldi [[REG2:r[0-9]+]], 51
; CHECK: sts longlong.array+5, [[REG2]]
; CHECK: sts longlong.array+4, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 102
; CHECK: ldi [[REG2:r[0-9]+]], 85
; CHECK: sts longlong.array+3, [[REG2]]
; CHECK: sts longlong.array+2, [[REG1]]
; CHECK: ldi [[REG1:r[0-9]+]], 136
; CHECK: ldi [[REG2:r[0-9]+]], 119
; CHECK: sts longlong.array+1, [[REG2]]
; CHECK: sts longlong.array, [[REG1]]
store i64 1234605616436508552, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @longlong.array, i64 0, i64 0)
store i64 81985529216486895, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @longlong.array, i64 0, i64 1)
store i64 1836475854449306472, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @longlong.array, i64 0, i64 2)
ret void
}
define i64 @array64_load() {
; CHECK-LABEL: array64_load:
; CHECK: lds r18, longlong.array+16
; CHECK: lds r19, longlong.array+17
; CHECK: lds r20, longlong.array+18
; CHECK: lds r21, longlong.array+19
; CHECK: lds r22, longlong.array+20
; CHECK: lds r23, longlong.array+21
; CHECK: lds r24, longlong.array+22
; CHECK: lds r25, longlong.array+23
%result = load i64, i64* getelementptr inbounds ([3 x i64], [3 x i64]* @longlong.array, i64 0, i64 2)
ret i64 %result
}
define i64 @static64_inc() {
; CHECK-LABEL: static64_inc:
; CHECK: lds r18, longlong.static
; CHECK: lds r19, longlong.static+1
; CHECK: lds r20, longlong.static+2
; CHECK: lds r21, longlong.static+3
; CHECK: lds r22, longlong.static+4
; CHECK: lds r23, longlong.static+5
; CHECK: lds r24, longlong.static+6
; CHECK: lds r25, longlong.static+7
; CHECK: subi r18, 255
; CHECK: sbci r19, 255
; CHECK: sbci r20, 255
; CHECK: sbci r21, 255
; CHECK: sbci r22, 255
; CHECK: sbci r23, 255
; CHECK: sbci r24, 255
; CHECK: sbci r25, 255
; CHECK-DAG: sts longlong.static+7, r25
; CHECK-DAG: sts longlong.static+6, r24
; CHECK-DAG: sts longlong.static+5, r23
; CHECK-DAG: sts longlong.static+4, r22
; CHECK-DAG: sts longlong.static+3, r21
; CHECK-DAG: sts longlong.static+2, r20
; CHECK-DAG: sts longlong.static+1, r19
; CHECK-DAG: sts longlong.static, r18
%1 = load i64, i64* @longlong.static
%inc = add nsw i64 %1, 1
store i64 %inc, i64* @longlong.static
ret i64 %inc
}
define i8 @constantaddr_read8() {
; CHECK-LABEL: constantaddr_read8:
; CHECK: lds r24, 1234
%1 = load i8, i8* inttoptr (i16 1234 to i8*)
ret i8 %1
}
define i16 @constantaddr_read16() {
; CHECK-LABEL: constantaddr_read16:
; CHECK: lds r24, 1234
; CHECK: lds r25, 1235
%1 = load i16, i16* inttoptr (i16 1234 to i16*)
ret i16 %1
}
define void @constantaddr_write8() {
; CHECK-LABEL: constantaddr_write8:
; CHECK: sts 1234
store i8 22, i8* inttoptr (i16 1234 to i8*)
ret void
}
define void @constantaddr_write16() {
; CHECK-LABEL: constantaddr_write16:
; CHECK: sts 1235
; CHECK: sts 1234
store i16 2222, i16* inttoptr (i16 1234 to i16*)
ret void
}
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