e18cc5277f
When shifting by a byte-multiple: bswap (shl X, C) --> lshr (bswap X), C bswap (lshr X, C) --> shl (bswap X), C This is the backend version of D122010 and an alternative suggested in D120648. There's an extra check to make sure the shift amount is valid that was not in the rough draft. I'm not sure if there is a larger motivating case for RISCV (bug report?), but the ARM diffs show a benefit from having a late version of the transform (because we do not combine the loads in IR). Differential Revision: https://reviews.llvm.org/D122655
564 lines
19 KiB
LLVM
564 lines
19 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc < %s -mtriple=arm64-unknown | FileCheck %s
|
|
|
|
; 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: // %bb.0:
|
|
; CHECK-NEXT: ldr w0, [x0]
|
|
; CHECK-NEXT: ret
|
|
%tmp = bitcast i32* %arg to i8*
|
|
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 0
|
|
%tmp2 = load i8, i8* %tmp1, 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: // %bb.0:
|
|
; CHECK-NEXT: ldr w0, [x0]
|
|
; CHECK-NEXT: ret
|
|
%tmp = bitcast i32* %arg to i8*
|
|
%tmp1 = getelementptr inbounds i8, i8* %tmp, i32 0
|
|
%tmp2 = load i8, i8* %tmp1, 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) {
|
|
; CHECK-LABEL: load_i32_by_i8_bswap:
|
|
; CHECK: // %bb.0:
|
|
; CHECK-NEXT: ldr w8, [x0]
|
|
; CHECK-NEXT: rev w0, w8
|
|
; CHECK-NEXT: ret
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldr x0, [x0]
|
|
; CHECK-NEXT: ret
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldr x8, [x0]
|
|
; CHECK-NEXT: rev x0, x8
|
|
; CHECK-NEXT: ret
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldur w0, [x0, #1]
|
|
; CHECK-NEXT: ret
|
|
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldur w0, [x0, #-4]
|
|
; CHECK-NEXT: ret
|
|
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldur w8, [x0, #1]
|
|
; CHECK-NEXT: rev w0, w8
|
|
; CHECK-NEXT: ret
|
|
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldur w8, [x0, #-4]
|
|
; CHECK-NEXT: rev w0, w8
|
|
; CHECK-NEXT: ret
|
|
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldr w8, [x0]
|
|
; CHECK-NEXT: rev w0, w8
|
|
; CHECK-NEXT: ret
|
|
|
|
%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; // p is 4 byte aligned
|
|
; (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: // %bb.0:
|
|
; CHECK-NEXT: ldr w0, [x0]
|
|
; CHECK-NEXT: ret
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: add x8, x0, w1, uxtw
|
|
; CHECK-NEXT: ldr w0, [x8, #12]
|
|
; CHECK-NEXT: ret
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: add x8, x0, w1, uxtw
|
|
; CHECK-NEXT: ldur w0, [x8, #13]
|
|
; CHECK-NEXT: ret
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldrh w0, [x0]
|
|
; CHECK-NEXT: ret
|
|
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldrb w8, [x0]
|
|
; CHECK-NEXT: ldrb w9, [x0, #1]
|
|
; CHECK-NEXT: lsl w0, w8, #8
|
|
; CHECK-NEXT: bfi w0, w9, #16, #8
|
|
; CHECK-NEXT: ret
|
|
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldrb w8, [x0]
|
|
; CHECK-NEXT: ldrb w9, [x0, #1]
|
|
; CHECK-NEXT: lsl w0, w8, #16
|
|
; CHECK-NEXT: bfi w0, w9, #24, #8
|
|
; CHECK-NEXT: ret
|
|
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldrh w8, [x0]
|
|
; CHECK-NEXT: rev16 w0, w8
|
|
; CHECK-NEXT: ret
|
|
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldrb w8, [x0, #1]
|
|
; CHECK-NEXT: ldrb w9, [x0]
|
|
; CHECK-NEXT: lsl w0, w8, #8
|
|
; CHECK-NEXT: bfi w0, w9, #16, #8
|
|
; CHECK-NEXT: ret
|
|
|
|
%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: // %bb.0:
|
|
; CHECK-NEXT: ldrb w8, [x0, #1]
|
|
; CHECK-NEXT: ldrb w9, [x0]
|
|
; CHECK-NEXT: lsl w0, w8, #16
|
|
; CHECK-NEXT: bfi w0, w9, #24, #8
|
|
; CHECK-NEXT: ret
|
|
|
|
%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
|
|
}
|