llvm-project/llvm/test/CodeGen/SystemZ/int-conv-12.ll

; Test 31-to-64 bit zero extensions.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s

; Test register extension, starting with an i64.
define i64 @f1(i64 %a) {
; CHECK-LABEL: f1:
; CHECK: llgtr %r2, %r2
; CHECK: br %r14
  %ext = and i64 %a, 2147483647
  ret i64 %ext
}

; Test register extension, starting with an i32.
define i64 @f2(i32 %a) {
; CHECK-LABEL: f2:
; CHECK: llgtr %r2, %r2
; CHECK: br %r14
  %and = and i32 %a, 2147483647
  %ext = zext i32 %and to i64
  ret i64 %ext
}

; ... and the other way around.
define i64 @f3(i32 %a) {
; CHECK-LABEL: f3:
; CHECK: llgtr %r2, %r2
; CHECK: br %r14
  %ext = zext i32 %a to i64
  %and = and i64 %ext, 2147483647
  ret i64 %and
}

; Check LLGT with no displacement.
define i64 @f4(i32 *%src) {
; CHECK-LABEL: f4:
; CHECK: llgt %r2, 0(%r2)
; CHECK: br %r14
  %word = load i32, i32 *%src
  %ext = zext i32 %word to i64
  %and = and i64 %ext, 2147483647
  ret i64 %and
}

; ... and the other way around.
define i64 @f5(i32 *%src) {
; CHECK-LABEL: f5:
; CHECK: llgt %r2, 0(%r2)
; CHECK: br %r14
  %word = load i32, i32 *%src
  %and = and i32 %word, 2147483647
  %ext = zext i32 %and to i64
  ret i64 %ext
}

; Check the high end of the LLGT range.
define i64 @f6(i32 *%src) {
; CHECK-LABEL: f6:
; CHECK: llgt %r2, 524284(%r2)
; CHECK: br %r14
  %ptr = getelementptr i32, i32 *%src, i64 131071
  %word = load i32 , i32 *%ptr
  %ext = zext i32 %word to i64
  %and = and i64 %ext, 2147483647
  ret i64 %and
}

; Check the next word up, which needs separate address logic.
; Other sequences besides this one would be OK.
define i64 @f7(i32 *%src) {
; CHECK-LABEL: f7:
; CHECK: agfi %r2, 524288
; CHECK: llgt %r2, 0(%r2)
; CHECK: br %r14
  %ptr = getelementptr i32, i32 *%src, i64 131072
  %word = load i32 , i32 *%ptr
  %ext = zext i32 %word to i64
  %and = and i64 %ext, 2147483647
  ret i64 %and
}

; Check the high end of the negative LLGT range.
define i64 @f8(i32 *%src) {
; CHECK-LABEL: f8:
; CHECK: llgt %r2, -4(%r2)
; CHECK: br %r14
  %ptr = getelementptr i32, i32 *%src, i64 -1
  %word = load i32 , i32 *%ptr
  %ext = zext i32 %word to i64
  %and = and i64 %ext, 2147483647
  ret i64 %and
}

; Check the low end of the LLGT range.
define i64 @f9(i32 *%src) {
; CHECK-LABEL: f9:
; CHECK: llgt %r2, -524288(%r2)
; CHECK: br %r14
  %ptr = getelementptr i32, i32 *%src, i64 -131072
  %word = load i32 , i32 *%ptr
  %ext = zext i32 %word to i64
  %and = and i64 %ext, 2147483647
  ret i64 %and
}

; Check the next word down, which needs separate address logic.
; Other sequences besides this one would be OK.
define i64 @f10(i32 *%src) {
; CHECK-LABEL: f10:
; CHECK: agfi %r2, -524292
; CHECK: llgt %r2, 0(%r2)
; CHECK: br %r14
  %ptr = getelementptr i32, i32 *%src, i64 -131073
  %word = load i32 , i32 *%ptr
  %ext = zext i32 %word to i64
  %and = and i64 %ext, 2147483647
  ret i64 %and
}

; Check that LLGT allows an index.
define i64 @f11(i64 %src, i64 %index) {
; CHECK-LABEL: f11:
; CHECK: llgt %r2, 524287(%r3,%r2)
; CHECK: br %r14
  %add1 = add i64 %src, %index
  %add2 = add i64 %add1, 524287
  %ptr = inttoptr i64 %add2 to i32 *
  %word = load i32 , i32 *%ptr
  %ext = zext i32 %word to i64
  %and = and i64 %ext, 2147483647
  ret i64 %and
}