File: setcc-takes-i32.ll

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (22 lines) | stat: -rw-r--r-- 904 bytes parent folder | download | duplicates (39)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
; RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu -o - %s | FileCheck %s

; Most important point here is that the promotion of the i1 works
; correctly. Previously LLVM thought that i64 was the appropriate SetCC output,
; which meant it proceded in two steps and produced an i64 -> i64 any_ext which
; couldn't be selected and faulted.

; It was expecting the smallest legal promotion of i1 to be the preferred SetCC
; type, so we'll satisfy it (this actually arguably gives better code anyway,
; with flag-manipulation operations allowed to use W-registers).

declare {i64, i1} @llvm.umul.with.overflow.i64(i64, i64)

define i64 @test_select(i64 %lhs, i64 %rhs) {
; CHECK-LABEL: test_select:

  %res = call {i64, i1} @llvm.umul.with.overflow.i64(i64 %lhs, i64 %rhs)
  %flag = extractvalue {i64, i1} %res, 1
  %retval = select i1 %flag, i64 %lhs, i64 %rhs
  ret i64 %retval
; CHECK: ret
}