File: offset_folding.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (42 lines) | stat: -rw-r--r-- 1,007 bytes parent folder | download | duplicates (7) 
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
29
30
31
32
33
34
35
36
37
38
39
40
41
42
 
; RUN: llc < %s -march=xcore | FileCheck %s

@a = external dso_local constant [0 x i32], section ".cp.rodata"
@b = external dso_local global [0 x i32]

define i32 *@f1() nounwind {
entry:
; CHECK-LABEL: f1:
; CHECK: ldaw r11, cp[a+4]
; CHECK: mov r0, r11
	%0 = getelementptr [0 x i32], [0 x i32]* @a, i32 0, i32 1
	ret i32* %0
}

define i32 *@f2() nounwind {
entry:
; CHECK-LABEL: f2:
; CHECK: ldaw r0, dp[b+4]
	%0 = getelementptr [0 x i32], [0 x i32]* @b, i32 0, i32 1
	ret i32* %0
}

; Don't fold negative offsets into cp / dp accesses to avoid a relocation
; error if the address + addend is less than the start of the cp / dp.

define i32 *@f3() nounwind {
entry:
; CHECK-LABEL: f3:
; CHECK: ldaw r11, cp[a]
; CHECK: sub r0, r11, 4
	%0 = getelementptr [0 x i32], [0 x i32]* @a, i32 0, i32 -1
	ret i32* %0
}

define i32 *@f4() nounwind {
entry:
; CHECK-LABEL: f4:
; CHECK: ldaw [[REG:r[0-9]+]], dp[b]
; CHECK: sub r0, [[REG]], 4
	%0 = getelementptr [0 x i32], [0 x i32]* @b, i32 0, i32 -1
	ret i32* %0
}