llvm-6502/test/CodeGen/SystemZ/fp-cmp-02.ll
Ulrich Weigand b503b49b51 [SystemZ] Add CodeGen test cases
This adds all CodeGen tests for the SystemZ target.

This version of the patch incorporates feedback from a review by
Sean Silva.  Thanks to all reviewers!

Patch by Richard Sandiford.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181204 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:17:29 +00:00

90 lines
2.4 KiB
LLVM

; Test 64-bit floating-point comparison.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; Check comparison with registers.
define i64 @f1(i64 %a, i64 %b, double %f1, double %f2) {
; CHECK: f1:
; CHECK: cdbr %f0, %f2
; CHECK-NEXT: j{{g?}}e
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%cond = fcmp oeq double %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check the low end of the CDB range.
define i64 @f2(i64 %a, i64 %b, double %f1, double *%ptr) {
; CHECK: f2:
; CHECK: cdb %f0, 0(%r4)
; CHECK-NEXT: j{{g?}}e
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%f2 = load double *%ptr
%cond = fcmp oeq double %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check the high end of the aligned CDB range.
define i64 @f3(i64 %a, i64 %b, double %f1, double *%base) {
; CHECK: f3:
; CHECK: cdb %f0, 4088(%r4)
; CHECK-NEXT: j{{g?}}e
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%ptr = getelementptr double *%base, i64 511
%f2 = load double *%ptr
%cond = fcmp oeq double %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check the next doubleword up, which needs separate address logic.
; Other sequences besides this one would be OK.
define i64 @f4(i64 %a, i64 %b, double %f1, double *%base) {
; CHECK: f4:
; CHECK: aghi %r4, 4096
; CHECK: cdb %f0, 0(%r4)
; CHECK-NEXT: j{{g?}}e
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%ptr = getelementptr double *%base, i64 512
%f2 = load double *%ptr
%cond = fcmp oeq double %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check negative displacements, which also need separate address logic.
define i64 @f5(i64 %a, i64 %b, double %f1, double *%base) {
; CHECK: f5:
; CHECK: aghi %r4, -8
; CHECK: cdb %f0, 0(%r4)
; CHECK-NEXT: j{{g?}}e
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%ptr = getelementptr double *%base, i64 -1
%f2 = load double *%ptr
%cond = fcmp oeq double %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check that CDB allows indices.
define i64 @f6(i64 %a, i64 %b, double %f1, double *%base, i64 %index) {
; CHECK: f6:
; CHECK: sllg %r1, %r5, 3
; CHECK: cdb %f0, 800(%r1,%r4)
; CHECK-NEXT: j{{g?}}e
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%ptr1 = getelementptr double *%base, i64 %index
%ptr2 = getelementptr double *%ptr1, i64 100
%f2 = load double *%ptr2
%cond = fcmp oeq double %f1, %f2
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}