File: 2010-09-01-RemoveCopyByCommutingDef.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 (28 lines) | stat: -rw-r--r-- 1,225 bytes parent folder | download | duplicates (18) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
; RUN: llc < %s -verify-machineinstrs | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-apple-darwin10.0.0"

; This test exercises the alias checking in SimpleRegisterCoalescing::RemoveCopyByCommutingDef.

define void @f(ptr %w, ptr %h, ptr %_this, ptr %image) nounwind ssp {
  %x1 = tail call i64 @g(ptr %_this, ptr %image) nounwind ; <i64> [#uses=3]
  %tmp1 = trunc i64 %x1 to i32                     ; <i32> [#uses=1]
; CHECK: movl (%r{{.*}}), %
  %x4 = load i32, ptr %h, align 4                      ; <i32> [#uses=1]

; The imull clobbers a 32-bit register.
; CHECK: imull %{{...}}, %e[[CLOBBER:..]]
  %x5 = mul nsw i32 %x4, %tmp1                      ; <i32> [#uses=1]

; So we cannot use the corresponding 64-bit register anymore.
; CHECK-NOT: shrq $32, %r[[CLOBBER]]
  %btmp3 = lshr i64 %x1, 32                         ; <i64> [#uses=1]
  %btmp4 = trunc i64 %btmp3 to i32                  ; <i32> [#uses=1]

; CHECK: idiv
  %x6 = sdiv i32 %x5, %btmp4                         ; <i32> [#uses=1]
  store i32 %x6, ptr %w, align 4
  ret void
}

declare i64 @g(ptr, ptr)