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llvm-mirror/test/CodeGen/ARM/load-combine.ll
Artur Pilipenko 3d8bddc9b0 [DAGCombiner] Support {a|s}ext, {a|z|s}ext load nodes in load combine 
Resubmit r295336 after the bug with non-zero offset patterns on BE targets is fixed (r296336).

Support {a|s}ext, {a|z|s}ext load nodes as a part of load combine patters.

Reviewed By: filcab

Differential Revision: https://reviews.llvm.org/D29591

llvm-svn: 296651
2017-03-01 18:12:29 +00:00

693 lines
22 KiB
LLVM
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; RUN: llc < %s -mtriple=arm-unknown | FileCheck %s
; RUN: llc < %s -mtriple=armv6-unknown | FileCheck %s --check-prefix=CHECK-ARMv6
; i8* p; // p is 1 byte aligned
; (i32) p[0] | ((i32) p[1] << 8) | ((i32) p[2] << 16) | ((i32) p[3] << 24)
define i32 @load_i32_by_i8_unaligned(i32* %arg) {
; CHECK-LABEL: load_i32_by_i8_unaligned:
; CHECK: ldrb{{.*}}r0
; CHECK: ldrb{{.*}}r0
; CHECK: ldrb{{.*}}r0
; CHECK: ldrb{{.*}}r0
; CHECK: orr
; CHECK: mov pc, lr
; CHECK-ARMv6-LABEL: load_i32_by_i8_unaligned:
; CHECK-ARMv6: ldrb{{.*}}r0
; CHECK-ARMv6: ldrb{{.*}}r0
; CHECK-ARMv6: ldrb{{.*}}r0
; CHECK-ARMv6: ldrb{{.*}}r0
; CHECK-ARMv6: orr
; CHECK-ARMv6: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 0
%tmp2 = load i8, i8* %tmp, align 1
%tmp3 = zext i8 %tmp2 to i32
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 1
%tmp5 = load i8, i8* %tmp4, align 1
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 8
%tmp8 = or i32 %tmp7, %tmp3
%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 2
%tmp10 = load i8, i8* %tmp9, align 1
%tmp11 = zext i8 %tmp10 to i32
%tmp12 = shl nuw nsw i32 %tmp11, 16
%tmp13 = or i32 %tmp8, %tmp12
%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 3
%tmp15 = load i8, i8* %tmp14, align 1
%tmp16 = zext i8 %tmp15 to i32
%tmp17 = shl nuw nsw i32 %tmp16, 24
%tmp18 = or i32 %tmp13, %tmp17
ret i32 %tmp18
}
; i8* p; // p is 4 byte aligned
; (i32) p[0] | ((i32) p[1] << 8) | ((i32) p[2] << 16) | ((i32) p[3] << 24)
define i32 @load_i32_by_i8_aligned(i32* %arg) {
; CHECK-LABEL: load_i32_by_i8_aligned:
; CHECK: ldr r0, [r0]
; CHECK-NEXT: mov pc, lr
; CHECK-ARMv6-LABEL: load_i32_by_i8_aligned:
; CHECK-ARMv6: ldr r0, [r0]
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 0
%tmp2 = load i8, i8* %tmp, align 4
%tmp3 = zext i8 %tmp2 to i32
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 1
%tmp5 = load i8, i8* %tmp4, align 1
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 8
%tmp8 = or i32 %tmp7, %tmp3
%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 2
%tmp10 = load i8, i8* %tmp9, align 1
%tmp11 = zext i8 %tmp10 to i32
%tmp12 = shl nuw nsw i32 %tmp11, 16
%tmp13 = or i32 %tmp8, %tmp12
%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 3
%tmp15 = load i8, i8* %tmp14, align 1
%tmp16 = zext i8 %tmp15 to i32
%tmp17 = shl nuw nsw i32 %tmp16, 24
%tmp18 = or i32 %tmp13, %tmp17
ret i32 %tmp18
}
; i8* p; // p is 4 byte aligned
; ((i32) p[0] << 24) | ((i32) p[1] << 16) | ((i32) p[2] << 8) | (i32) p[3]
define i32 @load_i32_by_i8_bswap(i32* %arg) {
; BSWAP is not supported by 32 bit target
; CHECK-LABEL: load_i32_by_i8_bswap:
; CHECK: ldr r0, [r0]
; CHECK: and
; CHECK-NEXT: and
; CHECK-NEXT: orr
; CHECK-NEXT: orr
; CHECK-NEXT: orr
; CHECK: mov pc, lr
; CHECK-ARMv6-LABEL: load_i32_by_i8_bswap:
; CHECK-ARMv6: ldr r0, [r0]
; CHECK-ARMv6-NEXT: rev r0, r0
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = load i8, i8* %tmp, align 4
%tmp2 = zext i8 %tmp1 to i32
%tmp3 = shl nuw nsw i32 %tmp2, 24
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 1
%tmp5 = load i8, i8* %tmp4, align 1
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 16
%tmp8 = or i32 %tmp7, %tmp3
%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 2
%tmp10 = load i8, i8* %tmp9, align 1
%tmp11 = zext i8 %tmp10 to i32
%tmp12 = shl nuw nsw i32 %tmp11, 8
%tmp13 = or i32 %tmp8, %tmp12
%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 3
%tmp15 = load i8, i8* %tmp14, align 1
%tmp16 = zext i8 %tmp15 to i32
%tmp17 = or i32 %tmp13, %tmp16
ret i32 %tmp17
}
; i8* p; // p is 8 byte aligned
; (i64) p[0] | ((i64) p[1] << 8) | ((i64) p[2] << 16) | ((i64) p[3] << 24) | ((i64) p[4] << 32) | ((i64) p[5] << 40) | ((i64) p[6] << 48) | ((i64) p[7] << 56)
define i64 @load_i64_by_i8(i64* %arg) {
; CHECK-LABEL: load_i64_by_i8:
; CHECK: ldr r2, [r0]
; CHECK-NEXT: ldr r1, [r0, #4]
; CHECK-NEXT: mov r0, r2
; CHECK-NEXT: mov pc, lr
; CHECK-ARMv6-LABEL: load_i64_by_i8:
; CHECK-ARMv6: ldrd r0, r1, [r0]
; CHECK-ARMv6: bx lr
%tmp = bitcast i64* %arg to i8*
%tmp1 = load i8, i8* %tmp, align 8
%tmp2 = zext i8 %tmp1 to i64
%tmp3 = getelementptr inbounds i8, i8* %tmp, i64 1
%tmp4 = load i8, i8* %tmp3, align 1
%tmp5 = zext i8 %tmp4 to i64
%tmp6 = shl nuw nsw i64 %tmp5, 8
%tmp7 = or i64 %tmp6, %tmp2
%tmp8 = getelementptr inbounds i8, i8* %tmp, i64 2
%tmp9 = load i8, i8* %tmp8, align 1
%tmp10 = zext i8 %tmp9 to i64
%tmp11 = shl nuw nsw i64 %tmp10, 16
%tmp12 = or i64 %tmp7, %tmp11
%tmp13 = getelementptr inbounds i8, i8* %tmp, i64 3
%tmp14 = load i8, i8* %tmp13, align 1
%tmp15 = zext i8 %tmp14 to i64
%tmp16 = shl nuw nsw i64 %tmp15, 24
%tmp17 = or i64 %tmp12, %tmp16
%tmp18 = getelementptr inbounds i8, i8* %tmp, i64 4
%tmp19 = load i8, i8* %tmp18, align 1
%tmp20 = zext i8 %tmp19 to i64
%tmp21 = shl nuw nsw i64 %tmp20, 32
%tmp22 = or i64 %tmp17, %tmp21
%tmp23 = getelementptr inbounds i8, i8* %tmp, i64 5
%tmp24 = load i8, i8* %tmp23, align 1
%tmp25 = zext i8 %tmp24 to i64
%tmp26 = shl nuw nsw i64 %tmp25, 40
%tmp27 = or i64 %tmp22, %tmp26
%tmp28 = getelementptr inbounds i8, i8* %tmp, i64 6
%tmp29 = load i8, i8* %tmp28, align 1
%tmp30 = zext i8 %tmp29 to i64
%tmp31 = shl nuw nsw i64 %tmp30, 48
%tmp32 = or i64 %tmp27, %tmp31
%tmp33 = getelementptr inbounds i8, i8* %tmp, i64 7
%tmp34 = load i8, i8* %tmp33, align 1
%tmp35 = zext i8 %tmp34 to i64
%tmp36 = shl nuw i64 %tmp35, 56
%tmp37 = or i64 %tmp32, %tmp36
ret i64 %tmp37
}
; i8* p; // p is 8 byte aligned
; ((i64) p[0] << 56) | ((i64) p[1] << 48) | ((i64) p[2] << 40) | ((i64) p[3] << 32) | ((i64) p[4] << 24) | ((i64) p[5] << 16) | ((i64) p[6] << 8) | (i64) p[7]
define i64 @load_i64_by_i8_bswap(i64* %arg) {
; CHECK-LABEL: load_i64_by_i8_bswap:
; CHECK: ldr{{.*}}r0
; CHECK: ldr{{.*}}r0
; CHECK: and
; CHECK-NEXT: and
; CHECK-NEXT: orr
; CHECK-NEXT: orr
; CHECK-NEXT: and
; CHECK-NEXT: orr
; CHECK-NEXT: and
; CHECK-NEXT: orr
; CHECK-NEXT: orr
; CHECK-NEXT: orr
; CHECK: mov pc, lr
; CHECK-ARMv6-LABEL: load_i64_by_i8_bswap:
; CHECK-ARMv6: ldrd r2, r3, [r0]
; CHECK-ARMv6: rev r0, r3
; CHECK-ARMv6: rev r1, r2
; CHECK-ARMv6: bx lr
%tmp = bitcast i64* %arg to i8*
%tmp1 = load i8, i8* %tmp, align 8
%tmp2 = zext i8 %tmp1 to i64
%tmp3 = shl nuw i64 %tmp2, 56
%tmp4 = getelementptr inbounds i8, i8* %tmp, i64 1
%tmp5 = load i8, i8* %tmp4, align 1
%tmp6 = zext i8 %tmp5 to i64
%tmp7 = shl nuw nsw i64 %tmp6, 48
%tmp8 = or i64 %tmp7, %tmp3
%tmp9 = getelementptr inbounds i8, i8* %tmp, i64 2
%tmp10 = load i8, i8* %tmp9, align 1
%tmp11 = zext i8 %tmp10 to i64
%tmp12 = shl nuw nsw i64 %tmp11, 40
%tmp13 = or i64 %tmp8, %tmp12
%tmp14 = getelementptr inbounds i8, i8* %tmp, i64 3
%tmp15 = load i8, i8* %tmp14, align 1
%tmp16 = zext i8 %tmp15 to i64
%tmp17 = shl nuw nsw i64 %tmp16, 32
%tmp18 = or i64 %tmp13, %tmp17
%tmp19 = getelementptr inbounds i8, i8* %tmp, i64 4
%tmp20 = load i8, i8* %tmp19, align 1
%tmp21 = zext i8 %tmp20 to i64
%tmp22 = shl nuw nsw i64 %tmp21, 24
%tmp23 = or i64 %tmp18, %tmp22
%tmp24 = getelementptr inbounds i8, i8* %tmp, i64 5
%tmp25 = load i8, i8* %tmp24, align 1
%tmp26 = zext i8 %tmp25 to i64
%tmp27 = shl nuw nsw i64 %tmp26, 16
%tmp28 = or i64 %tmp23, %tmp27
%tmp29 = getelementptr inbounds i8, i8* %tmp, i64 6
%tmp30 = load i8, i8* %tmp29, align 1
%tmp31 = zext i8 %tmp30 to i64
%tmp32 = shl nuw nsw i64 %tmp31, 8
%tmp33 = or i64 %tmp28, %tmp32
%tmp34 = getelementptr inbounds i8, i8* %tmp, i64 7
%tmp35 = load i8, i8* %tmp34, align 1
%tmp36 = zext i8 %tmp35 to i64
%tmp37 = or i64 %tmp33, %tmp36
ret i64 %tmp37
}
; i8* p; // p[1] is 4 byte aligned
; (i32) p[1] | ((i32) p[2] << 8) | ((i32) p[3] << 16) | ((i32) p[4] << 24)
define i32 @load_i32_by_i8_nonzero_offset(i32* %arg) {
; CHECK-LABEL: load_i32_by_i8_nonzero_offset:
; CHECK: ldr r0, [r0, #1]
; CHECK-NEXT: mov pc, lr
; CHECK-ARMv6-LABEL: load_i32_by_i8_nonzero_offset:
; CHECK-ARMv6: ldr r0, [r0, #1]
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 1
%tmp2 = load i8, i8* %tmp1, align 4
%tmp3 = zext i8 %tmp2 to i32
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 2
%tmp5 = load i8, i8* %tmp4, align 1
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 8
%tmp8 = or i32 %tmp7, %tmp3
%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 3
%tmp10 = load i8, i8* %tmp9, align 1
%tmp11 = zext i8 %tmp10 to i32
%tmp12 = shl nuw nsw i32 %tmp11, 16
%tmp13 = or i32 %tmp8, %tmp12
%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 4
%tmp15 = load i8, i8* %tmp14, align 1
%tmp16 = zext i8 %tmp15 to i32
%tmp17 = shl nuw nsw i32 %tmp16, 24
%tmp18 = or i32 %tmp13, %tmp17
ret i32 %tmp18
}
; i8* p; // p[-4] is 4 byte aligned
; (i32) p[-4] | ((i32) p[-3] << 8) | ((i32) p[-2] << 16) | ((i32) p[-1] << 24)
define i32 @load_i32_by_i8_neg_offset(i32* %arg) {
; CHECK-LABEL: load_i32_by_i8_neg_offset:
; CHECK: ldr r0, [r0, #-4]
; CHECK-NEXT: mov pc, lr
; CHECK-ARMv6-LABEL: load_i32_by_i8_neg_offset:
; CHECK-ARMv6: ldr r0, [r0, #-4]
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 -4
%tmp2 = load i8, i8* %tmp1, align 4
%tmp3 = zext i8 %tmp2 to i32
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 -3
%tmp5 = load i8, i8* %tmp4, align 1
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 8
%tmp8 = or i32 %tmp7, %tmp3
%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 -2
%tmp10 = load i8, i8* %tmp9, align 1
%tmp11 = zext i8 %tmp10 to i32
%tmp12 = shl nuw nsw i32 %tmp11, 16
%tmp13 = or i32 %tmp8, %tmp12
%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 -1
%tmp15 = load i8, i8* %tmp14, align 1
%tmp16 = zext i8 %tmp15 to i32
%tmp17 = shl nuw nsw i32 %tmp16, 24
%tmp18 = or i32 %tmp13, %tmp17
ret i32 %tmp18
}
; i8* p; // p[1] is 4 byte aligned
; (i32) p[4] | ((i32) p[3] << 8) | ((i32) p[2] << 16) | ((i32) p[1] << 24)
define i32 @load_i32_by_i8_nonzero_offset_bswap(i32* %arg) {
; CHECK-LABEL: load_i32_by_i8_nonzero_offset_bswap:
; CHECK: ldr r0, [r0, #1]
; CHECK-NEXT: mov r1, #65280
; CHECK-NEXT: mov r2, #16711680
; CHECK-NEXT: and r1, r1, r0, lsr #8
; CHECK-NEXT: and r2, r2, r0, lsl #8
; CHECK-NEXT: orr r1, r1, r0, lsr #24
; CHECK-NEXT: orr r0, r2, r0, lsl #24
; CHECK-NEXT: orr r0, r0, r1
; CHECK-NEXT: mov pc, lr
; CHECK-ARMv6-LABEL: load_i32_by_i8_nonzero_offset_bswap:
; CHECK-ARMv6: ldr r0, [r0, #1]
; CHECK-ARMv6-NEXT: rev r0, r0
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 4
%tmp2 = load i8, i8* %tmp1, align 1
%tmp3 = zext i8 %tmp2 to i32
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 3
%tmp5 = load i8, i8* %tmp4, align 1
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 8
%tmp8 = or i32 %tmp7, %tmp3
%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 2
%tmp10 = load i8, i8* %tmp9, align 1
%tmp11 = zext i8 %tmp10 to i32
%tmp12 = shl nuw nsw i32 %tmp11, 16
%tmp13 = or i32 %tmp8, %tmp12
%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 1
%tmp15 = load i8, i8* %tmp14, align 4
%tmp16 = zext i8 %tmp15 to i32
%tmp17 = shl nuw nsw i32 %tmp16, 24
%tmp18 = or i32 %tmp13, %tmp17
ret i32 %tmp18
}
; i8* p; // p[-4] is 4 byte aligned
; (i32) p[-1] | ((i32) p[-2] << 8) | ((i32) p[-3] << 16) | ((i32) p[-4] << 24)
define i32 @load_i32_by_i8_neg_offset_bswap(i32* %arg) {
; CHECK-LABEL: load_i32_by_i8_neg_offset_bswap:
; CHECK: ldr r0, [r0, #-4]
; CHECK-NEXT: mov r1, #65280
; CHECK-NEXT: mov r2, #16711680
; CHECK-NEXT: and r1, r1, r0, lsr #8
; CHECK-NEXT: and r2, r2, r0, lsl #8
; CHECK-NEXT: orr r1, r1, r0, lsr #24
; CHECK-NEXT: orr r0, r2, r0, lsl #24
; CHECK-NEXT: orr r0, r0, r1
; CHECK-NEXT: mov pc, lr
; CHECK-ARMv6-LABEL: load_i32_by_i8_neg_offset_bswap:
; CHECK-ARMv6: ldr r0, [r0, #-4]
; CHECK-ARMv6-NEXT: rev r0, r0
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 -1
%tmp2 = load i8, i8* %tmp1, align 1
%tmp3 = zext i8 %tmp2 to i32
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 -2
%tmp5 = load i8, i8* %tmp4, align 1
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 8
%tmp8 = or i32 %tmp7, %tmp3
%tmp9 = getelementptr inbounds i8, i8* %tmp, i32 -3
%tmp10 = load i8, i8* %tmp9, align 1
%tmp11 = zext i8 %tmp10 to i32
%tmp12 = shl nuw nsw i32 %tmp11, 16
%tmp13 = or i32 %tmp8, %tmp12
%tmp14 = getelementptr inbounds i8, i8* %tmp, i32 -4
%tmp15 = load i8, i8* %tmp14, align 4
%tmp16 = zext i8 %tmp15 to i32
%tmp17 = shl nuw nsw i32 %tmp16, 24
%tmp18 = or i32 %tmp13, %tmp17
ret i32 %tmp18
}
declare i16 @llvm.bswap.i16(i16)
; i16* p; // p is 4 byte aligned
; (i32) bswap(p[1]) | (i32) bswap(p[0] << 16)
define i32 @load_i32_by_bswap_i16(i32* %arg) {
; CHECK-LABEL: load_i32_by_bswap_i16:
; CHECK: ldr r0, [r0]
; CHECK-NEXT: mov r1, #65280
; CHECK-NEXT: mov r2, #16711680
; CHECK-NEXT: and r1, r1, r0, lsr #8
; CHECK-NEXT: and r2, r2, r0, lsl #8
; CHECK-NEXT: orr r1, r1, r0, lsr #24
; CHECK-NEXT: orr r0, r2, r0, lsl #24
; CHECK-NEXT: orr r0, r0, r1
; CHECK-NEXT: mov pc, lr
; CHECK-ARMv6-LABEL: load_i32_by_bswap_i16:
; CHECK-ARMv6: ldr r0, [r0]
; CHECK-ARMv6-NEXT: rev r0, r0
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i16*
%tmp1 = load i16, i16* %tmp, align 4
%tmp11 = call i16 @llvm.bswap.i16(i16 %tmp1)
%tmp2 = zext i16 %tmp11 to i32
%tmp3 = getelementptr inbounds i16, i16* %tmp, i32 1
%tmp4 = load i16, i16* %tmp3, align 1
%tmp41 = call i16 @llvm.bswap.i16(i16 %tmp4)
%tmp5 = zext i16 %tmp41 to i32
%tmp6 = shl nuw nsw i32 %tmp2, 16
%tmp7 = or i32 %tmp6, %tmp5
ret i32 %tmp7
}
; i16* p;
; (i32) p[0] | (sext(p[1] << 16) to i32)
define i32 @load_i32_by_sext_i16(i32* %arg) {
; CHECK-LABEL: load_i32_by_sext_i16:
; CHECK: ldr r0, [r0]
; CHECK-NEXT: mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_sext_i16:
; CHECK-ARMv6: ldr r0, [r0]
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i16*
%tmp1 = load i16, i16* %tmp, align 4
%tmp2 = zext i16 %tmp1 to i32
%tmp3 = getelementptr inbounds i16, i16* %tmp, i32 1
%tmp4 = load i16, i16* %tmp3, align 1
%tmp5 = sext i16 %tmp4 to i32
%tmp6 = shl nuw nsw i32 %tmp5, 16
%tmp7 = or i32 %tmp6, %tmp2
ret i32 %tmp7
}
; i8* arg; i32 i;
; p = arg + 12;
; (i32) p[i] | ((i32) p[i + 1] << 8) | ((i32) p[i + 2] << 16) | ((i32) p[i + 3] << 24)
define i32 @load_i32_by_i8_base_offset_index(i8* %arg, i32 %i) {
; CHECK-LABEL: load_i32_by_i8_base_offset_index:
; CHECK: add r0, r0, r1
; CHECK-NEXT: ldr r0, [r0, #12]
; CHECK-NEXT: mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_i8_base_offset_index:
; CHECK-ARMv6: add r0, r0, r1
; CHECK-ARMv6-NEXT: ldr r0, [r0, #12]
; CHECK-ARMv6-NEXT: bx lr
%tmp = add nuw nsw i32 %i, 3
%tmp2 = add nuw nsw i32 %i, 2
%tmp3 = add nuw nsw i32 %i, 1
%tmp4 = getelementptr inbounds i8, i8* %arg, i64 12
%tmp5 = zext i32 %i to i64
%tmp6 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp5
%tmp7 = load i8, i8* %tmp6, align 4
%tmp8 = zext i8 %tmp7 to i32
%tmp9 = zext i32 %tmp3 to i64
%tmp10 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp9
%tmp11 = load i8, i8* %tmp10, align 1
%tmp12 = zext i8 %tmp11 to i32
%tmp13 = shl nuw nsw i32 %tmp12, 8
%tmp14 = or i32 %tmp13, %tmp8
%tmp15 = zext i32 %tmp2 to i64
%tmp16 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp15
%tmp17 = load i8, i8* %tmp16, align 1
%tmp18 = zext i8 %tmp17 to i32
%tmp19 = shl nuw nsw i32 %tmp18, 16
%tmp20 = or i32 %tmp14, %tmp19
%tmp21 = zext i32 %tmp to i64
%tmp22 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp21
%tmp23 = load i8, i8* %tmp22, align 1
%tmp24 = zext i8 %tmp23 to i32
%tmp25 = shl nuw i32 %tmp24, 24
%tmp26 = or i32 %tmp20, %tmp25
ret i32 %tmp26
}
; i8* arg; i32 i;
; p = arg + 12;
; (i32) p[i + 1] | ((i32) p[i + 2] << 8) | ((i32) p[i + 3] << 16) | ((i32) p[i + 4] << 24)
define i32 @load_i32_by_i8_base_offset_index_2(i8* %arg, i32 %i) {
; CHECK-LABEL: load_i32_by_i8_base_offset_index_2:
; CHECK: add r0, r0, r1
; CHECK-NEXT: ldr r0, [r0, #13]
; CHECK-NEXT: mov pc, lr
;
; CHECK-ARMv6-LABEL: load_i32_by_i8_base_offset_index_2:
; CHECK-ARMv6: add r0, r0, r1
; CHECK-ARMv6-NEXT: ldr r0, [r0, #13]
; CHECK-ARMv6-NEXT: bx lr
%tmp = add nuw nsw i32 %i, 4
%tmp2 = add nuw nsw i32 %i, 3
%tmp3 = add nuw nsw i32 %i, 2
%tmp4 = getelementptr inbounds i8, i8* %arg, i64 12
%tmp5 = add nuw nsw i32 %i, 1
%tmp27 = zext i32 %tmp5 to i64
%tmp28 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp27
%tmp29 = load i8, i8* %tmp28, align 4
%tmp30 = zext i8 %tmp29 to i32
%tmp31 = zext i32 %tmp3 to i64
%tmp32 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp31
%tmp33 = load i8, i8* %tmp32, align 1
%tmp34 = zext i8 %tmp33 to i32
%tmp35 = shl nuw nsw i32 %tmp34, 8
%tmp36 = or i32 %tmp35, %tmp30
%tmp37 = zext i32 %tmp2 to i64
%tmp38 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp37
%tmp39 = load i8, i8* %tmp38, align 1
%tmp40 = zext i8 %tmp39 to i32
%tmp41 = shl nuw nsw i32 %tmp40, 16
%tmp42 = or i32 %tmp36, %tmp41
%tmp43 = zext i32 %tmp to i64
%tmp44 = getelementptr inbounds i8, i8* %tmp4, i64 %tmp43
%tmp45 = load i8, i8* %tmp44, align 1
%tmp46 = zext i8 %tmp45 to i32
%tmp47 = shl nuw i32 %tmp46, 24
%tmp48 = or i32 %tmp42, %tmp47
ret i32 %tmp48
}
; i8* p; // p is 2 byte aligned
; (i32) p[0] | ((i32) p[1] << 8)
define i32 @zext_load_i32_by_i8(i32* %arg) {
; CHECK-LABEL: zext_load_i32_by_i8:
; CHECK: ldrb r1, [r0]
; CHECK-NEXT: ldrb r0, [r0, #1]
; CHECK-NEXT: orr r0, r1, r0, lsl #8
; CHECK-NEXT: mov pc, lr
;
; CHECK-ARMv6-LABEL: zext_load_i32_by_i8:
; CHECK-ARMv6: ldrb r1, [r0]
; CHECK-ARMv6-NEXT: ldrb r0, [r0, #1]
; CHECK-ARMv6-NEXT: orr r0, r1, r0, lsl #8
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 0
%tmp2 = load i8, i8* %tmp1, align 2
%tmp3 = zext i8 %tmp2 to i32
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 1
%tmp5 = load i8, i8* %tmp4, align 1
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 8
%tmp8 = or i32 %tmp7, %tmp3
ret i32 %tmp8
}
; i8* p; // p is 2 byte aligned
; ((i32) p[0] << 8) | ((i32) p[1] << 16)
define i32 @zext_load_i32_by_i8_shl_8(i32* %arg) {
; CHECK-LABEL: zext_load_i32_by_i8_shl_8:
; CHECK: ldrb r1, [r0]
; CHECK-NEXT: ldrb r0, [r0, #1]
; CHECK-NEXT: lsl r0, r0, #16
; CHECK-NEXT: orr r0, r0, r1, lsl #8
; CHECK-NEXT: mov pc, lr
;
; CHECK-ARMv6-LABEL: zext_load_i32_by_i8_shl_8:
; CHECK-ARMv6: ldrb r1, [r0]
; CHECK-ARMv6-NEXT: ldrb r0, [r0, #1]
; CHECK-ARMv6-NEXT: lsl r0, r0, #16
; CHECK-ARMv6-NEXT: orr r0, r0, r1, lsl #8
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 0
%tmp2 = load i8, i8* %tmp1, align 2
%tmp3 = zext i8 %tmp2 to i32
%tmp30 = shl nuw nsw i32 %tmp3, 8
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 1
%tmp5 = load i8, i8* %tmp4, align 1
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 16
%tmp8 = or i32 %tmp7, %tmp30
ret i32 %tmp8
}
; i8* p; // p is 2 byte aligned
; ((i32) p[0] << 16) | ((i32) p[1] << 24)
define i32 @zext_load_i32_by_i8_shl_16(i32* %arg) {
; CHECK-LABEL: zext_load_i32_by_i8_shl_16:
; CHECK: ldrb r1, [r0]
; CHECK-NEXT: ldrb r0, [r0, #1]
; CHECK-NEXT: lsl r0, r0, #24
; CHECK-NEXT: orr r0, r0, r1, lsl #16
; CHECK-NEXT: mov pc, lr
;
; CHECK-ARMv6-LABEL: zext_load_i32_by_i8_shl_16:
; CHECK-ARMv6: ldrb r1, [r0]
; CHECK-ARMv6-NEXT: ldrb r0, [r0, #1]
; CHECK-ARMv6-NEXT: lsl r0, r0, #24
; CHECK-ARMv6-NEXT: orr r0, r0, r1, lsl #16
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 0
%tmp2 = load i8, i8* %tmp1, align 2
%tmp3 = zext i8 %tmp2 to i32
%tmp30 = shl nuw nsw i32 %tmp3, 16
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 1
%tmp5 = load i8, i8* %tmp4, align 1
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 24
%tmp8 = or i32 %tmp7, %tmp30
ret i32 %tmp8
}
; i8* p; // p is 2 byte aligned
; (i32) p[1] | ((i32) p[0] << 8)
define i32 @zext_load_i32_by_i8_bswap(i32* %arg) {
; CHECK-LABEL: zext_load_i32_by_i8_bswap:
; CHECK: ldrb r1, [r0]
; CHECK-NEXT: ldrb r0, [r0, #1]
; CHECK-NEXT: orr r0, r0, r1, lsl #8
; CHECK-NEXT: mov pc, lr
;
; CHECK-ARMv6-LABEL: zext_load_i32_by_i8_bswap:
; CHECK-ARMv6: ldrb r1, [r0]
; CHECK-ARMv6-NEXT: ldrb r0, [r0, #1]
; CHECK-ARMv6-NEXT: orr r0, r0, r1, lsl #8
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 1
%tmp2 = load i8, i8* %tmp1, align 1
%tmp3 = zext i8 %tmp2 to i32
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 0
%tmp5 = load i8, i8* %tmp4, align 2
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 8
%tmp8 = or i32 %tmp7, %tmp3
ret i32 %tmp8
}
; i8* p; // p is 2 byte aligned
; ((i32) p[1] << 8) | ((i32) p[0] << 16)
define i32 @zext_load_i32_by_i8_bswap_shl_8(i32* %arg) {
; CHECK-LABEL: zext_load_i32_by_i8_bswap_shl_8:
; CHECK: ldrb r1, [r0]
; CHECK-NEXT: ldrb r0, [r0, #1]
; CHECK-NEXT: lsl r1, r1, #16
; CHECK-NEXT: orr r0, r1, r0, lsl #8
; CHECK-NEXT: mov pc, lr
;
; CHECK-ARMv6-LABEL: zext_load_i32_by_i8_bswap_shl_8:
; CHECK-ARMv6: ldrb r1, [r0]
; CHECK-ARMv6-NEXT: ldrb r0, [r0, #1]
; CHECK-ARMv6-NEXT: lsl r1, r1, #16
; CHECK-ARMv6-NEXT: orr r0, r1, r0, lsl #8
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 1
%tmp2 = load i8, i8* %tmp1, align 1
%tmp3 = zext i8 %tmp2 to i32
%tmp30 = shl nuw nsw i32 %tmp3, 8
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 0
%tmp5 = load i8, i8* %tmp4, align 2
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 16
%tmp8 = or i32 %tmp7, %tmp30
ret i32 %tmp8
}
; i8* p; // p is 2 byte aligned
; ((i32) p[1] << 16) | ((i32) p[0] << 24)
define i32 @zext_load_i32_by_i8_bswap_shl_16(i32* %arg) {
; CHECK-LABEL: zext_load_i32_by_i8_bswap_shl_16:
; CHECK: ldrb r1, [r0]
; CHECK-NEXT: ldrb r0, [r0, #1]
; CHECK-NEXT: lsl r1, r1, #24
; CHECK-NEXT: orr r0, r1, r0, lsl #16
; CHECK-NEXT: mov pc, lr
;
; CHECK-ARMv6-LABEL: zext_load_i32_by_i8_bswap_shl_16:
; CHECK-ARMv6: ldrb r1, [r0]
; CHECK-ARMv6-NEXT: ldrb r0, [r0, #1]
; CHECK-ARMv6-NEXT: lsl r1, r1, #24
; CHECK-ARMv6-NEXT: orr r0, r1, r0, lsl #16
; CHECK-ARMv6-NEXT: bx lr
%tmp = bitcast i32* %arg to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 1
%tmp2 = load i8, i8* %tmp1, align 1
%tmp3 = zext i8 %tmp2 to i32
%tmp30 = shl nuw nsw i32 %tmp3, 16
%tmp4 = getelementptr inbounds i8, i8* %tmp, i32 0
%tmp5 = load i8, i8* %tmp4, align 2
%tmp6 = zext i8 %tmp5 to i32
%tmp7 = shl nuw nsw i32 %tmp6, 24
%tmp8 = or i32 %tmp7, %tmp30
ret i32 %tmp8
}
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