File: 2008-06-13-NotVolatileLoadStore.ll

package info (click to toggle)
llvm 2.6-9.1
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 57,604 kB
  • ctags: 44,336
  • sloc: cpp: 344,766; sh: 12,407; ansic: 10,617; ada: 3,070; ml: 2,505; perl: 2,496; makefile: 1,426; pascal: 1,163; exp: 389; asm: 307; python: 298; objc: 260; lisp: 182; csh: 117; xml: 38; f90: 36; tcl: 20
file content (23 lines) | stat: -rw-r--r-- 926 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
; RUN: llvm-as < %s | llc -march=x86 | not grep movsd
; RUN: llvm-as < %s | llc -march=x86 | grep movw
; RUN: llvm-as < %s | llc -march=x86 | grep addw
; These transforms are turned off for volatile loads and stores.
; Check that they weren't turned off for all loads and stores!

@atomic = global double 0.000000e+00		; <double*> [#uses=1]
@atomic2 = global double 0.000000e+00		; <double*> [#uses=1]
@ioport = global i32 0		; <i32*> [#uses=1]
@ioport2 = global i32 0		; <i32*> [#uses=1]

define i16 @f(i64 %x) {
	%b = bitcast i64 %x to double		; <double> [#uses=1]
	store double %b, double* @atomic
	store double 0.000000e+00, double* @atomic2
	%l = load i32* @ioport		; <i32> [#uses=1]
	%t = trunc i32 %l to i16		; <i16> [#uses=1]
	%l2 = load i32* @ioport2		; <i32> [#uses=1]
	%tmp = lshr i32 %l2, 16		; <i32> [#uses=1]
	%t2 = trunc i32 %tmp to i16		; <i16> [#uses=1]
	%f = add i16 %t, %t2		; <i16> [#uses=1]
	ret i16 %f
}