File: combine_loads_from_build_pair.ll

package info (click to toggle)
llvm-toolchain-21 1%3A21.1.6-3
  • links: PTS, VCS
  • area: main
  • in suites: sid
  • size: 2,245,028 kB
  • sloc: cpp: 7,619,726; ansic: 1,434,018; asm: 1,058,748; python: 252,740; f90: 94,671; objc: 70,685; lisp: 42,813; pascal: 18,401; sh: 8,601; ml: 5,111; perl: 4,720; makefile: 3,675; awk: 3,523; javascript: 2,409; xml: 892; fortran: 770
file content (22 lines) | stat: -rw-r--r-- 981 bytes parent folder | download | duplicates (17)
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=s390x-linux-gnu < %s -debug -stop-after=machineverifier 2>&1 | FileCheck %s

; REQUIRES: asserts
define i128 @func1({ i128, ptr } %struct) {
; Verify that we get a combine on the build_pair, creating a LD8 load somewhere
; between "Initial selection DAG" and "Optimized lowered selection DAG".
; The target is big-endian, and stack grows towards higher addresses,
; so we expect the LD8 to load from the address used in the original HIBITS
; load.
; CHECK-LABEL: Initial selection DAG:
; CHECK:     [[LOBITS:t[0-9]+]]: i64,ch = load<(load (s64))>
; CHECK:     [[HIBITS:t[0-9]+]]: i64,ch = load<(load (s64))>
; CHECK: Combining: t{{[0-9]+}}: i128 = build_pair [[LOBITS]], [[HIBITS]]
; CHECK-NEXT: Creating new node
; CHECK-SAME: load<(load (s128), align 8)>
; CHECK-NEXT: into
; CHECK-SAME: load<(load (s128), align 8)>
; CHECK-LABEL: Optimized lowered selection DAG:
  %result = extractvalue {i128, ptr } %struct, 0
  ret i128 %result
}