You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
132 lines
3.6 KiB
132 lines
3.6 KiB
; Test 32-bit byteswaps from memory to registers.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
declare i32 @llvm.bswap.i32(i32 %a)
|
|
|
|
; Check LRV with no displacement.
|
|
define i32 @f1(i32 *%src) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: lrv %r2, 0(%r2)
|
|
; CHECK: br %r14
|
|
%a = load i32, i32 *%src
|
|
%swapped = call i32 @llvm.bswap.i32(i32 %a)
|
|
ret i32 %swapped
|
|
}
|
|
|
|
; Check the high end of the aligned LRV range.
|
|
define i32 @f2(i32 *%src) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: lrv %r2, 524284(%r2)
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i32, i32 *%src, i64 131071
|
|
%a = load i32, i32 *%ptr
|
|
%swapped = call i32 @llvm.bswap.i32(i32 %a)
|
|
ret i32 %swapped
|
|
}
|
|
|
|
; Check the next word up, which needs separate address logic.
|
|
; Other sequences besides this one would be OK.
|
|
define i32 @f3(i32 *%src) {
|
|
; CHECK-LABEL: f3:
|
|
; CHECK: agfi %r2, 524288
|
|
; CHECK: lrv %r2, 0(%r2)
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i32, i32 *%src, i64 131072
|
|
%a = load i32, i32 *%ptr
|
|
%swapped = call i32 @llvm.bswap.i32(i32 %a)
|
|
ret i32 %swapped
|
|
}
|
|
|
|
; Check the high end of the negative aligned LRV range.
|
|
define i32 @f4(i32 *%src) {
|
|
; CHECK-LABEL: f4:
|
|
; CHECK: lrv %r2, -4(%r2)
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i32, i32 *%src, i64 -1
|
|
%a = load i32, i32 *%ptr
|
|
%swapped = call i32 @llvm.bswap.i32(i32 %a)
|
|
ret i32 %swapped
|
|
}
|
|
|
|
; Check the low end of the LRV range.
|
|
define i32 @f5(i32 *%src) {
|
|
; CHECK-LABEL: f5:
|
|
; CHECK: lrv %r2, -524288(%r2)
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i32, i32 *%src, i64 -131072
|
|
%a = load i32, i32 *%ptr
|
|
%swapped = call i32 @llvm.bswap.i32(i32 %a)
|
|
ret i32 %swapped
|
|
}
|
|
|
|
; Check the next word down, which needs separate address logic.
|
|
; Other sequences besides this one would be OK.
|
|
define i32 @f6(i32 *%src) {
|
|
; CHECK-LABEL: f6:
|
|
; CHECK: agfi %r2, -524292
|
|
; CHECK: lrv %r2, 0(%r2)
|
|
; CHECK: br %r14
|
|
%ptr = getelementptr i32, i32 *%src, i64 -131073
|
|
%a = load i32, i32 *%ptr
|
|
%swapped = call i32 @llvm.bswap.i32(i32 %a)
|
|
ret i32 %swapped
|
|
}
|
|
|
|
; Check that LRV allows an index.
|
|
define i32 @f7(i64 %src, i64 %index) {
|
|
; CHECK-LABEL: f7:
|
|
; CHECK: lrv %r2, 524287({{%r3,%r2|%r2,%r3}})
|
|
; CHECK: br %r14
|
|
%add1 = add i64 %src, %index
|
|
%add2 = add i64 %add1, 524287
|
|
%ptr = inttoptr i64 %add2 to i32 *
|
|
%a = load i32, i32 *%ptr
|
|
%swapped = call i32 @llvm.bswap.i32(i32 %a)
|
|
ret i32 %swapped
|
|
}
|
|
|
|
; Test a case where we spill the source of at least one LRVR. We want
|
|
; to use LRV if possible.
|
|
define i32 @f8(i32 *%ptr0) {
|
|
; CHECK-LABEL: f8:
|
|
; CHECK: lrv {{%r[0-9]+}}, 16{{[04]}}(%r15)
|
|
; CHECK: br %r14
|
|
|
|
%val0 = call i32 @foo()
|
|
%val1 = call i32 @foo()
|
|
%val2 = call i32 @foo()
|
|
%val3 = call i32 @foo()
|
|
%val4 = call i32 @foo()
|
|
%val5 = call i32 @foo()
|
|
%val6 = call i32 @foo()
|
|
%val7 = call i32 @foo()
|
|
%val8 = call i32 @foo()
|
|
%val9 = call i32 @foo()
|
|
|
|
%swapped0 = call i32 @llvm.bswap.i32(i32 %val0)
|
|
%swapped1 = call i32 @llvm.bswap.i32(i32 %val1)
|
|
%swapped2 = call i32 @llvm.bswap.i32(i32 %val2)
|
|
%swapped3 = call i32 @llvm.bswap.i32(i32 %val3)
|
|
%swapped4 = call i32 @llvm.bswap.i32(i32 %val4)
|
|
%swapped5 = call i32 @llvm.bswap.i32(i32 %val5)
|
|
%swapped6 = call i32 @llvm.bswap.i32(i32 %val6)
|
|
%swapped7 = call i32 @llvm.bswap.i32(i32 %val7)
|
|
%swapped8 = call i32 @llvm.bswap.i32(i32 %val8)
|
|
%swapped9 = call i32 @llvm.bswap.i32(i32 %val9)
|
|
|
|
%ret1 = add i32 %swapped0, %swapped1
|
|
%ret2 = add i32 %ret1, %swapped2
|
|
%ret3 = add i32 %ret2, %swapped3
|
|
%ret4 = add i32 %ret3, %swapped4
|
|
%ret5 = add i32 %ret4, %swapped5
|
|
%ret6 = add i32 %ret5, %swapped6
|
|
%ret7 = add i32 %ret6, %swapped7
|
|
%ret8 = add i32 %ret7, %swapped8
|
|
%ret9 = add i32 %ret8, %swapped9
|
|
|
|
ret i32 %ret9
|
|
}
|
|
|
|
declare i32 @foo()
|